Supercharge Your Workflow

Text Compare

Compare text line-by-line and word-by-word with fast difference navigation.

Diff Patch Tool

Parse unified diff and preview patch application on source text with hunk validation.

Text Case Converter

Switch between upper, lower, title, sentence, snake, camel, and more.

Word Counter

Count words online instantly with reading time and unique-word metrics.

Letter Counter

Count letters online with uppercase, lowercase, space, and symbol totals.

HTML Editor

Edit and preview HTML online in-browser with simple and advanced modes.

HTML Minifier

Minify and prettify HTML markup online for cleaner readable source.

CSS Minifier

Minify and beautify CSS stylesheets online for fast optimization.

Markdown Editor

Write Markdown and see live HTML preview with clean formatted output.

SQL Formatter

Format SQL queries for readability with keyword and indentation controls.

Regex Tester

Test regular expressions and inspect match results quickly.

Text Statistics

Analyze words, characters, lines, and reading time instantly.

Line Tools

Trim, sort, deduplicate, and clean multiline text quickly.

Text Replacer

Find and replace text with regex and case-sensitive controls.

Lorem Ipsum Generator

Generate clean placeholder paragraphs for design and testing.

Text Deduplicator Online Tool

Remove duplicate lines or words with flexible matching.

Keyword Density Analyzer

Analyze word frequency and keyword density from text blocks.

Reading Time Estimator

Estimate reading and speaking time from text content.

N-Gram Extractor

Extract frequent n-grams from text input quickly, with counts for phrase and keyword analysis.

Regex Explainer

Explain regex tokens, test match behavior, and understand pattern logic directly in your browser.

Text Similarity Checker

Compare two texts and compute token similarity metrics.

Readability Studio

Analyze readability with Flesch and grade-level metrics.

Markdown Outline Extractor

Extract a clean heading outline from markdown documents for navigation, review, and planning.

Text Redactor

Redact sensitive data like email, phone, IP, and URLs.

Unicode Inspector

Inspect code points, bytes, and character metrics in text.

JSON Formatter and Validator

Validate, format, and minify JSON with clear error feedback.

JSON and CSV Converter

Convert JSON to CSV and CSV to JSON for import and export workflows.

XML Formatter and Validator

Validate, format, and minify XML content quickly with readable output and error feedback.

XML JSON Converter

Convert XML to JSON and JSON to XML with clean structured output.

YAML Formatter and Validator

Validate, format, and minify YAML content for configuration and API workflows.

YAML JSON Converter

Convert YAML to JSON and JSON to YAML instantly with readable output.

JSONPath Tester

Evaluate JSONPath expressions against JSON data and inspect matched results.

XPath Tester

Run XPath queries on XML input and inspect element, attribute, and text matches.

Semver Comparator and Range Evaluator

Compare semantic versions and test version ranges with clear pass/fail output.

Number Base Converter

Convert numbers across binary, octal, decimal, hex, and base-36.

URL Parser

Parse URL components including query parameters in one view.

HTTP Status Lookup

Find HTTP status codes quickly with meaning and category details.

MIME Type Lookup

Look up MIME types by extension or find common extensions from MIME values.

IPv6 Tools

Expand, compress, and validate IPv6 addresses for network diagnostics.

User Agent Parser

Parse user agent strings into browser, OS, device, and engine details.

IP Viewer

View detected client IP, IP version, and forwarding headers instantly.

IP Lookup Tool

Look up IP or hostname with address resolution, reverse DNS, and geo/network metadata.

DNS Lookup Tool

Query A, AAAA, CNAME, MX, TXT, and NS DNS records from one interface.

IPv4 Subnet Calculator

Calculate network address, subnet mask, broadcast, and host range from IPv4 CIDR.

CIDR to Range

Convert IPv4 CIDR notation to full start/end range and usable host boundaries.

IP to Decimal Converter

Convert IPv4 addresses to decimal and decimal values back to IPv4 instantly.

Color Converter

Convert colors between HEX, RGB, and HSL with live preview.

CSV Formatter

Validate and format CSV with delimiter support for cleaner tabular data.

Unit Converter

Convert length, weight, temperature, and digital storage values quickly.

JSON Key Extractor Online Tool

Extract nested JSON key paths and flatten object structures.

CSV Column Selector Online Tool

Select, reorder, or remove CSV columns by name or index.

JSON Diff

Compare JSON objects and arrays and list exact key-path differences quickly.

XML Diff

Compare XML documents and detect meaningful content differences line by line.

YAML Diff

Compare YAML text inputs and identify changed, added, or removed lines.

cURL Generator

Generate cURL commands from method, URL, headers, and request body values.

JSON Schema Generator

Generate JSON schema structures from sample JSON payloads.

CSV to XML Converter

Convert CSV table data into XML with configurable root/item names.

INI Parser

Parse INI config files to JSON for debugging and migration tasks.

CSV Profiler

Profile CSV columns for type, empties, and uniqueness.

JSON Flattener

Flatten nested JSON objects into path-key maps for easier analysis, exports, and comparisons.

DNS Zone Parser

Parse DNS zone files into structured record summaries.

Markdown Table Builder

Build Markdown tables from CSV or TSV input quickly, with clean formatting for docs and issues.

HTML Table Extractor

Extract table rows from HTML into CSV or TSV so web table data is easier to reuse.

JSON Schema Sample Generator

Generate sample JSON payloads from JSON Schema for testing APIs, docs, and examples.

Access Log Parser

Parse web access logs and summarize traffic patterns.

Email Header Parser

Parse raw email headers and summarize key fields for delivery, routing, and security checks.

HTTP Request Parser

Parse raw HTTP requests into structured JSON for debugging headers, methods, paths, and bodies.

HTTP Response Parser

Parse raw HTTP responses into structured JSON for debugging status lines, headers, and bodies.

CSV Random Sampler

Sample random rows from CSV input quickly for QA, previews, testing, and dataset review.

Domain Extractor

Extract domains from mixed text and URL lists for cleanup, deduplication, and analysis.

JSON Lines Merger

Merge JSON lines (JSONL/NDJSON) into a JSON array.

JSON Pointer Evaluator

Evaluate RFC 6901 JSON Pointer paths against JSON data.

JSON Merge Patch Tool

Apply RFC 7396 merge patch documents to JSON and preview the patched result safely.

INI Overlay Merger

Merge base and overlay INI files with override behavior.

OpenAPI Swagger Validator

Validate OpenAPI and Swagger JSON or YAML specs for paths, operations, responses, and metadata.

Dockerfile Linter

Check Dockerfiles for cache, security, image size, secrets, and container best-practice issues.

Kubernetes YAML Validator

Validate Kubernetes manifests for metadata, selectors, containers, resources, probes, and risky defaults.

Base64 Encode and Decode

Encode and decode UTF-8 text using Base64 safely in browser.

Base32 Base58 Base58Check Converter

Convert text and bytes between Base32, Base58, and Base58Check with checksum validation.

URL Encoder and Decoder

Convert URL components between readable and encoded forms.

HTML Encoder and Decoder

Encode and decode HTML entities safely for markup and debugging.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes.

SHA256 Generator

Generate SHA-256 hashes quickly for integrity checks.

HMAC Generator

Generate keyed HMAC signatures with SHA-256, SHA-384, and SHA-512.

Password Strength Checker

Evaluate password quality with practical security feedback.

Unicode Converter

Convert plain text to Unicode escape sequences and decode back instantly.

JWT Decoder

Decode JWT header and payload locally without sending data out.

JWT Encoder

Create signed HS256 JWT tokens locally from JSON payload and secret.

JWT Verifier

Verify JWT signatures for HS, RS, and ES algorithms using secret, PEM key, or JWKS.

PEM X.509 Certificate Decoder

Decode PEM and X.509 certificate details including issuer, subject, validity, SAN, and key metadata.

TLS SSL Certificate Expiry Checker

Check a public domain TLS certificate issuer, validity dates, SAN entries, and days until expiry.

Secure Compare Tool Online

Compare two values safely with optional normalization.

Password Policy Tester

Test passwords against configurable policy rules including length, case, digits, and symbols.

Password Entropy Calculator

Calculate entropy bits and strength level for passwords.

TOTP Generator

Generate time-based OTP codes from Base32 secret keys.

Webhook Signature Verifier

Verify webhook signatures using HMAC algorithms for secure integration debugging and testing.

PBKDF2 Key Generator

Derive secure keys from passwords using PBKDF2 with configurable salt, iterations, and length.

AES GCM Encrypt Decrypt

Encrypt and decrypt text locally with AES-GCM for quick private testing and validation.

CRC32 Checksum Calculator

Calculate CRC32 checksum values for text input to verify data, payloads, and file content.

JWT Timeline Inspector

Inspect JWT timeline claims like iat, nbf, and exp.

Cookie Parser

Parse Cookie header values into key-value pairs for debugging browser sessions and requests.

Set Cookie Parser

Parse Set-Cookie headers into structured attributes.

Base64 Inspector

Decode Base64 and inspect bytes, text preview, and JSON payloads.

UUID Generator

Generate single or bulk UUID v4 values instantly for testing, identifiers, and development workflows.

UUID v7 and ULID Generator

Generate sortable UUID v7 and ULID identifiers with secure randomness.

Password Generator

Create strong random passwords with configurable character sets.

Random String Generator

Generate random strings for tokens, placeholders, and test data.

Passphrase Generator

Generate memorable multi-word passphrases for stronger account security.

Nano ID Generator

Generate compact secure nano IDs with custom alphabet and length.

Username Generator

Generate multiple username ideas with style and number options.

QR Code Generator

Generate QR codes for text and URLs with size, error correction, and color controls.

QR Code Decoder

Decode QR payloads from uploaded images directly in your browser.

Barcode Generator

Generate CODE128, EAN13, UPC, and ITF14 barcodes with configurable dimensions.

Data Matrix and Aztec Generator

Generate Data Matrix or Aztec 2D codes for compact payload encoding.

QR Style Tool

Create styled QR visuals with shape and color customization.

UUID Validator

Validate UUID values by version and format and check input batches quickly.

Quick Paste

Create secure shareable snippet links with expiry and optional password protection.

File Share

Share a small temporary file with an expiring private link, optional password, and one-time download.

Image Format Converter

Convert images between PNG, JPG, and WEBP in-browser with quality controls.

Image Resizer

Resize image dimensions with aspect-ratio controls and export-ready output.

Image Compressor

Compress images with quality, resize, and output format controls directly in browser.

Background Remover

Remove image backgrounds in-browser and export transparent results quickly.

Bulk Image Compressor

Compress multiple images together and download optimized output as files or ZIP.

HEIC to JPG PNG Converter

Convert HEIC and HEIF photos to JPG or PNG directly in your browser.

AVIF WEBP Converter

Convert AVIF and WEBP files between modern and common image formats.

EXIF Metadata Remover

Strip image metadata by re-encoding pixels for safer sharing.

Image to PDF Converter

Convert one or multiple image files into a single PDF in browser.

PDF Compressor

Compress PDF files using fast rewrite mode or stronger raster mode with quality controls.

PDF Watermark

Add text watermarks to PDF pages with opacity, position, and rotation controls.

PDF Protect Password Tool

Apply password protection to PDF files directly in-browser.

PDF Unlock Tool

Unlock password-protected PDFs using the known password and save unlocked output.

PDF Rotate Reorder Pages

Rotate page ranges and reorder PDF pages in one processing step.

PDF Extract Delete Pages

Extract selected pages or delete chosen pages from PDF files.

PDF Merge and Split Tool

Merge multiple PDFs or split selected page ranges from a PDF file.

PDF to Images Converter

Render PDF pages into PNG or JPEG files with range and scale controls.

Image to Text Converter

Extract text from image files with browser-based OCR and quick TXT export.

PDF to Text Converter

Run OCR on scanned PDF pages and export recognized text in plain text format.

Make PDF Searchable

Add a hidden text layer to scanned PDFs to enable search and copy actions.

Screenshot to Text Converter

Paste or upload screenshots and convert visible text to editable plain text.

Handwriting to Text Converter (Beta)

Convert handwritten notes to editable text. Results depend on writing clarity and image quality.

PDF to Word Converter

Convert PDF text content into downloadable DOCX files with page grouping.

Word to PDF Converter

Convert DOCX text content to PDF in-browser for quick sharing and printing.

Image to Searchable PDF

Create searchable PDFs from one or multiple images with OCR text overlays.

Multi-page Text Export

Process multiple images and PDFs in one run, then export combined extracted text as TXT or DOCX.

Timestamp Converter

Convert Unix timestamps to readable dates and back.

Cron Expression Parser

Parse cron schedules with readable explanations and upcoming run times.

Date Difference Calculator

Calculate time difference between two dates with human-friendly breakdown.

Timezone Converter and Meeting Planner

Convert times across IANA zones and rank meeting slots by business-hour overlap.

Age Calculator

Calculate exact age in years, months, and days with next birthday details.

Online Notes

Create and edit shared notes by link with custom IDs and real-time sync.

Loan Calculator

Calculate monthly payments, total interest, and payoff estimates for loans.

Percentage Calculator

Calculate percent change, percent of value, and increase/decrease scenarios instantly.

Business Days Calculator

Count business days between dates with configurable weekend inclusion.

Merge PDF Online

Merge multiple PDF files into one document online.

Cron Expression Visualizer

Visualize upcoming run times from cron expressions.

Color Palette Generator

Generate color palettes from a base color quickly.

CSS Gradient Generator

Generate CSS linear gradients and preview output instantly.

Range List Tool

Compress number lists into ranges or expand ranges to numbers.

Date Range Generator

Generate date/time series with custom step intervals.

List Set Operations

Compute intersection, union, and differences between lists.

Favicon Generator

Generate favicon PNG sizes, app icons, manifest snippets, and browser HTML tags from an image or text mark.

Mortgage Calculator

Estimate monthly mortgage payment with down payment, taxes, insurance, PMI, and amortization summary.

ROI Calculator

Calculate ROI, net gain, annualized ROI, and payback period from investment cost and return.

Currency Converter

Convert currency amounts using a manually entered exchange rate with clear non-live-rate limits.

Invoice Generator

Generate a printable invoice summary with client details, line items, tax, discount, and notes.

EMI Loan Calculator

Calculate monthly EMI, total repayment, and total interest for fixed-rate loans.

Loan Amortization Calculator

Generate month-wise amortization schedule with optional extra monthly payment.

Simple and Compound Interest Calculator

Calculate maturity value using simple or compound interest methods.

NPV Calculator

Compute net present value from initial investment, discount rate, and cash-flow series.

IRR Calculator

Estimate internal rate of return from initial investment and periodic cash flows.

Depreciation Calculator

Calculate straight-line or declining-balance depreciation schedule.

Profit Margin Calculator

Calculate profit, margin percentage, and markup percentage from cost and selling price.

GST and VAT Calculator

Add or remove GST/VAT from an amount based on tax rate.

Invoice Total Calculator

Calculate invoice grand total with discount, tax, and shipping components.

Payroll Take-home Calculator

Estimate monthly take-home pay after taxes, social contribution, and fixed deductions.

SIP Calculator

Estimate mutual fund SIP maturity value from monthly contribution, return, and tenure.

CAGR Calculator

Calculate compound annual growth rate between starting and ending investment value.

Inflation Impact Calculator

See how inflation reduces purchasing power and future value over time.

Discount and Sale Price Calculator

Find discount amount, final sale price, and effective savings percentage.

Payback Period Calculator

Estimate time needed to recover initial investment from annual cash flows.

Retirement Corpus Calculator

Estimate required retirement corpus from expenses, inflation, and post-retirement return.

Fixed Deposit Maturity Calculator

Calculate fixed deposit maturity value with compounding frequency and interest rate.

Ohm's Law Calculator

Compute voltage, current, or resistance from any two known values.

Power Calculator

Calculate electrical power using V*I, I^2*R, or V^2/R formulas.

Resistor Color Code Decoder

Decode 4-band resistor value and tolerance from selected color bands.

LED Resistor Calculator

Calculate required series resistor and resistor wattage for LED circuits.

Voltage Divider Calculator

Calculate output voltage and divider current for two-resistor divider networks.

RC Time Constant Calculator

Calculate RC time constant tau and approximate settling time.

Capacitor Charge and Discharge Calculator

Compute capacitor voltage at a given time during charge or discharge.

555 Timer Calculator

Calculate astable frequency/duty or monostable pulse width for 555 timer circuits.

ADC and DAC Converter Calculator

Calculate ADC code from analog input and DAC output from digital code.

PWM Duty and Frequency Calculator

Convert between period/on-time and frequency/duty cycle representations.

Motor Full Load Current Calculator

Estimate motor full-load current from power, voltage, power factor, and efficiency.

Power Factor Correction Calculator

Calculate required capacitor bank size to improve power factor.

Short Circuit Current Estimator

Estimate transformer-based short-circuit current from rating and impedance.

UPS Battery Backup Time Calculator

Estimate UPS backup duration from battery voltage, capacity, load, and efficiency.

Cable Conduit Fill Calculator

Estimate cable count inside conduit from diameters and fill percentage.

Signal Attenuation dB Calculator

Calculate attenuation in dB from input and output power values.

Transformer Sizing Calculator

Estimate transformer kVA and full-load current from connected load, power factor, and utilization.

Cable Tray Fill Calculator

Estimate allowable cable count and fill percentage for rectangular cable trays.

Earthing Grid Resistance Estimator

Estimate grounding resistance from grid and rod parameters using simplified equations.

Harmonic Distortion THD Calculator

Compute total harmonic distortion from fundamental and harmonic magnitudes.

Generator Sizing Calculator

Estimate generator kVA from running load, power factor, starting factor, and derating.

Arc Flash Boundary Estimator

Estimate simplified arc-flash boundary distance from voltage, current, and arc duration.

Solar PV System Sizing Calculator

Estimate panel count, inverter size, and battery storage from daily energy demand and sun hours.

Circuit Breaker Sizing Helper

Suggest breaker size from load current and standard derating margins.

Earthing Conductor Sizing Calculator

Estimate grounding conductor area from fault current and fault-clearing time.

Bolt Torque Calculator

Estimate tightening torque from preload, nominal diameter, and nut factor.

Shaft Power and Torque Calculator

Convert between shaft power and torque at a given rotational speed.

Gear Ratio Calculator

Compute gear ratio and output speed from driver and driven tooth counts.

Belt Length Calculator

Estimate open-belt length from pulley diameters and center distance.

Bearing Life Calculator

Calculate L10 bearing life in million revolutions and operating hours.

Machining Speed and Feed Calculator

Estimate spindle speed and feed rate from cutting speed and cutter data.

Tap Drill Size Calculator

Estimate metric tap drill size from major diameter, pitch, and engagement.

Thermal Expansion Calculator

Calculate linear thermal expansion from length, coefficient, and temperature change.

Spring Rate Calculator

Calculate helical compression spring rate from geometry and shear modulus.

Weld Size Calculator

Estimate fillet weld throat area and approximate capacity from allowable stress.

Tolerance Stackup Calculator

Compute total dimensional tolerance using worst-case or RSS method.

Press Fit Interference Calculator

Estimate diametral interference and contact pressure for press fits.

Center of Gravity 2D Calculator

Calculate 2D center of gravity from point masses for quick mechanical layout checks.

Plate Weight Calculator

Estimate plate mass and weight from dimensions and material density.

Anchor Bolt Pullout Estimator

Estimate anchor pullout capacity from diameter, embedment, and concrete strength.

GD&T Positional Tolerance Calculator

Calculate total positional tolerance with MMC bonus and virtual condition.

Fits and Tolerances ISO Helper

Estimate hole-shaft limits and resulting clearance/interference for common ISO fit classes.

Fatigue Life Estimator

Estimate fatigue life from simplified S-N curve inputs with mean stress correction.

Weld Distortion Estimator

Estimate weld shrinkage and angular distortion from heat input and section properties.

Sheet Metal Bend Allowance Calculator

Compute bend allowance, outside setback, and bend deduction for sheet-metal bending.

CNC Surface Speed Feed Optimizer

Suggest speed and feed from material presets with practical machine constraints.

Geo Distance Calculator

Calculate great-circle distance between two latitude/longitude points.

Bearing Calculator

Calculate initial bearings between two geographic points.

Coordinate Format Converter

Convert coordinates between decimal degrees and DMS formats.

Geographic Midpoint Calculator

Compute midpoint coordinate between two points on Earth.

Polygon Area Calculator

Estimate polygon area and perimeter from latitude/longitude vertex list.

UTM Zone Finder

Find UTM zone number and hemisphere from latitude and longitude.

Geohash Tool

Encode lat/lon into geohash or decode geohash to approximate coordinate.

Map Scale Calculator

Calculate map ratio from map and ground distance or reverse-calculate ground distance.

Elevation Grade Calculator

Calculate grade percentage and slope angle from elevations and horizontal distance.

Destination Point Calculator

Compute destination coordinates from start point, bearing, and travel distance.

Survey Traverse Closure Calculator

Compute traverse closure error and relative precision from distance-bearing legs.

Coordinate Transformation Helper

Apply translation, rotation, and scale transformations between local and global coordinate frames.

Traverse Adjustment Bowditch

Adjust traverse latitude/departure values by Bowditch rule and compute corrected coordinates.

Contour Interval Volume Estimator

Estimate volume from contour elevation-area rows using end-area method.

Line of Sight Visibility Tool

Check theoretical line-of-sight visibility from heights and path length with curvature/refraction.

Solar Shadow Azimuth Calculator

Estimate solar azimuth/altitude and shadow direction/length from date and solar time.

Bearing Distance Resection Helper

Estimate unknown point coordinates from bearings observed to two known control points.

Area and Perimeter Calculator

Calculate area and perimeter for rectangle, circle, triangle, and trapezoid.

Volume and Surface Area Calculator

Calculate volume and surface area for cube, cuboid, cylinder, sphere, and cone.

Slope and Grade Calculator

Convert rise and run to slope ratio, grade percentage, and angle.

Concrete Volume Calculator

Estimate concrete volume for slabs, footings, columns, and beams.

Rebar Weight Calculator

Estimate steel rebar weight from diameter, bar length, and quantity.

Brick and Block Quantity Calculator

Estimate brick or block quantity using wall area, unit size, mortar, and wastage.

Paint Quantity Calculator

Estimate paint requirement from area, coats, coverage rate, and wastage.

Tile Quantity Calculator

Estimate floor tile count from floor dimensions, tile size, and wastage.

Beam Reaction Calculator

Calculate support reactions for simply supported beams with UDL and point load.

Earthwork Cut and Fill Calculator

Estimate cut/fill volume and earthmoving balance with swell and shrinkage factors.

Pipe Flow Velocity Calculator

Calculate internal flow velocity from pipe diameter and volumetric flow rate.

Pipe Pressure Drop Calculator

Estimate pressure loss with Darcy-Weisbach relation from line inputs.

Pump Power Calculator

Estimate hydraulic and shaft power from flow, head, density, and efficiency.

Voltage Drop Calculator

Estimate single-phase and three-phase voltage drop from cable and load inputs.

Cable Size Calculator

Suggest a practical copper cable size from current and installation factors.

Section Properties Calculator

Calculate area and second moments of area for common section shapes.

BOQ Estimator

Estimate bill-of-quantities totals from item lines with overhead and contingency.

Bearing and Azimuth Converter

Convert surveying bearings and azimuth angles in both directions.

Chainage and Stationing Calculator

Generate chainage stations from start, interval, and count.

Leveling Rise and Fall Calculator

Calculate rise, fall, and net level change from BS/FS observations.

Coordinate Area Calculator

Calculate polygon area and perimeter from coordinates using shoelace method.

Stress and Strain Calculator

Calculate stress, strain, and approximate modulus from force and deformation.

Factor of Safety Calculator

Calculate factor of safety from strength and working stress.

Column Slenderness Calculator

Calculate KL/r slenderness ratio from effective length and radius of gyration.

Beam Deflection Calculator

Estimate simply-supported beam deflection under UDL and point load.

Material Cost Estimator

Estimate material procurement cost with tax and transport.

Labor Cost Estimator

Estimate labor spending from crew size, wage, days, and overtime.

Construction Schedule Duration Calculator

Estimate task duration from quantity, crew size, productivity, and daily hours.

Break-even Calculator

Calculate break-even units and revenue from fixed and variable costs.

Soil Bearing Capacity Calculator

Estimate gross allowable and ultimate bearing capacity from net allowable pressure and footing geometry.

Retaining Wall Pressure Calculator

Estimate active lateral earth pressure and resultant force location using Rankine method.

Compaction Control Calculator

Calculate relative compaction and moisture deviation from Proctor reference values.

Manning Flow Calculator

Compute open-channel discharge and velocity using Manning equation inputs.

Weir Discharge Calculator

Estimate rectangular and V-notch weir discharge from crest head and coefficient.

Hazen-Williams Calculator

Estimate pipe head loss and pressure drop in water lines with Hazen-Williams equation.

Cooling Load Estimator

Estimate sensible cooling demand from envelope and internal gains.

Duct Velocity Calculator

Calculate air velocity from airflow and duct dimensions for rectangular or circular ducts.

Air Change Rate Calculator

Compute required airflow for target ACH and achieved ACH from supplied airflow.

Earned Value Calculator

Calculate CPI, SPI, variances, and EAC from planned, earned, and actual cost.

Resource Allocation Calculator

Estimate team size requirements from work content, duration, and daily capacity.

Project Cash Flow Calculator

Estimate monthly net cash profile with retention and mobilization assumptions.

NPSH Available Calculator

Estimate NPSH available from pressure head, static head, and suction losses.

Pipe Friction Loss Calculator

Calculate Darcy-Weisbach friction loss from flow, pipe size, and fluid properties.

Reynolds Number Calculator

Calculate Reynolds number and determine laminar or turbulent flow regime.

Heat Exchanger LMTD Calculator

Compute logarithmic mean temperature difference for parallel and counterflow exchangers.

Psychrometric Air Properties

Estimate humidity ratio, dew point, and moist air enthalpy from dry-bulb and RH.

Compressor Power Estimator

Estimate compressor shaft power from flow, pressure ratio, and efficiency.

Infinite Slope Stability Calculator

Estimate infinite-slope factor of safety using friction angle, cohesion, and pore pressure.

Cantilever Beam Multiple Loads Calculator

Estimate fixed-end reactions and tip deflection for cantilever beam with multiple loads.

Concrete Mix Ratio Calculator

Estimate cement, sand, and aggregate quantities from nominal concrete mix ratio.

RCC Beam Design Helper

Estimate tensile steel demand for rectangular RCC beam sections from factored moment.

Slab Reinforcement Estimator

Estimate slab bar count, total bar length, and steel weight from slab dimensions and spacing.

Footing Sizing Estimator

Estimate footing area and dimensions using service load and allowable bearing pressure.

Steel Section Selector

Estimate required section modulus and indicative inertia for preliminary steel member sizing.

Wind Load Estimator

Estimate wind pressure and lateral force from speed factors, coefficients, and projected area.

Seismic Base Shear Estimator

Estimate seismic base shear using design spectral acceleration, response factor, and seismic weight.

Pump Affinity Laws Calculator

Use affinity laws to estimate flow, head, and power changes with speed or impeller diameter adjustments.

Water Hammer Pressure Estimator

Estimate surge pressure from abrupt velocity changes using Joukowsky relation inputs.

Pipe Network Headloss Calculator

Estimate headloss in a pipe run using Hazen-Williams or Darcy-Weisbach with practical unit support.

Tank Fill Drain Time Calculator

Estimate time required to fill or drain tanks from flow rate and volume values.

Orifice Flow Calculator

Estimate discharge through sharp-edged orifices from head, diameter, and coefficient of discharge.

Detention Basin Sizing Calculator

Estimate required detention storage volume using inflow, outflow, and storm duration assumptions.

Psychrometric Process Plot Helper

Compare two psychrometric states and estimate sensible and latent process components.

Chiller Tonnage Estimator

Estimate refrigeration tons from cooling load or chilled-water flow and temperature difference.

Duct Friction Rate Calculator

Estimate duct friction rate using airflow, diameter, and roughness.

Fan Static Pressure Estimator

Estimate required fan static pressure from duct and component pressure losses.

Heating Load Estimator

Estimate heating load from envelope losses, ventilation, and internal gains.

Cooling Tower Approach Range Calculator

Compute cooling tower approach, range, effectiveness, and heat rejection.

Retaining Wall Stability Check

Check overturning and sliding factors of safety for simplified cantilever retaining walls.

Bar Bending Schedule Calculator

Generate simplified rebar cut-length and weight totals by diameter and quantity.

Staircase Design Calculator

Estimate riser, tread, and stair geometry from floor height and run constraints.

Beam Shear Moment Diagram Generator

Compute support reactions and generate simplified shear and moment diagram tables.

Rainwater Harvesting Tank Sizing

Estimate storage tank size from roof area, rainfall, runoff coefficient, and demand.

Pipe Size from Flow Velocity Calculator

Calculate required internal diameter from target flow rate and design velocity.

Critical Path CPM Calculator

Compute earliest/latest times, float, and critical activities for simple CPM networks.

UTM Builder

Build campaign tracking links with UTM parameters for analytics.

Slug Generator

Create clean SEO-friendly URL slugs from text with lowercase, separator, and cleanup controls.

Open Graph Twitter Card Preview

Preview Open Graph and Twitter card metadata from URL or pasted HTML before publishing.

XML Sitemap Validator

Validate sitemap XML syntax, URL entries, duplicates, and sitemap index structure.

Robots.txt Tester

Test robots allow/disallow behavior for any user-agent and path.

Schema Markup Validator

Parse and validate JSON-LD schema markup with missing-field warnings.

Broken Link Checker

Crawl a single page and detect outbound links that are broken or unreachable.

Robots.txt Generator

Generate clean robots.txt files with allow/disallow paths, sitemap links, and crawler directives.

XML Sitemap Generator

Generate XML sitemaps from page paths with configurable changefreq and priority defaults.

CSP Generator

Build Content-Security-Policy headers from common directives for production-ready deployment.

CSP Evaluator

Analyze CSP header strings for missing directives, duplicate rules, and weak security patterns.

HTTP Header Checker

Parse and inspect raw HTTP headers with duplicate detection and security header checks.

Canonical URL Generator

Normalize URLs and generate canonical link tags for SEO consistency.

Hreflang Generator

Generate alternate hreflang tags from locale and URL rows.

Meta Description Generator

Draft and validate meta title/description length with snippet preview output.

Redirect Rules Generator

Generate Apache or Nginx redirect rules from old,new URL maps.

Color Contrast Checker

Check WCAG AA/AAA contrast ratio between two colors.

Robots Rule Tester

Test robots allow/disallow behavior for user-agents and paths.

Schema Markup Generator

Generate FAQ, HowTo, and Product JSON-LD schema markup.

HTML Heading Extractor

Extract an H1-H6 heading outline from HTML snippets to review page structure and SEO hierarchy.

CSP Nonce Hash Generator

Generate CSP nonce and hash values for inline scripts.

URL Batch Analyzer

Analyze URL lists for domains, protocols, and query params.

HTML Link Extractor

Extract links and asset URLs from HTML content for audits, cleanup, and crawler-style review.

Sitemap Auditor

Audit sitemap XML for duplicates and invalid URLs.

Robots Meta Generator

Generate robots meta tag and X-Robots-Tag directives.

URL Normalizer

Normalize URL lists by stripping trackers and sorting params.

HTML Meta Extractor

Extract title, description, canonical, and OG tags from HTML.

Map Plotter

Plot latitude and longitude points on an animated world grid instantly.

Dice Roller

Roll one or multiple dice with animation and instant totals.

Coin Flip

Flip a virtual coin with smooth animation and streak tracking.

Random Number Picker

Pick fair random numbers from custom ranges with animated draw.

Random Number Wheel

Pick random numbers instantly from a configurable range.