IO Tools:
Free online developer tools including JSON formatter, text compare, hash generator, Base64 encoder, URL parser, and more. With 57+ tools across 6 categories, IO Tools helps you quickly format, convert, encode, and work with data directly in your browser. Everything runs locally for speed and privacy, and data is not stored on our servers. Built to keep useful tools simple, fast, and all in one place - dmlub2Ro
Text and Content
14 tools
Text Compare
Compare text line-by-line and word-by-word with fast difference navigation.
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.
Data and Conversion
18 tools
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.
CSV Formatter
Validate and format CSV with delimiter support for cleaner tabular data.
XML Formatter and Validator
Validate, format, and minify XML content quickly.
XML JSON Converter
Convert XML to JSON and JSON to XML with clean structured output.
Number Base Converter
Convert numbers across binary, octal, decimal, hex, and base-36.
Unit Converter
Convert length, weight, temperature, and digital storage values quickly.
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.
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.
Timestamp Converter
Convert Unix timestamps to readable dates and back.
Encoding and Security
10 tools
Base64 Encode and Decode
Encode and decode UTF-8 text using Base64 safely in browser.
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 Encoder
Create signed HS256 JWT tokens locally from JSON payload and secret.
JWT Decoder
Decode JWT header and payload locally without sending data out.
Generators
7 tools
UUID Generator
Generate single or bulk UUID v4 values instantly.
Password Generator
Create strong random passwords with configurable character sets.
Passphrase Generator
Generate memorable multi-word passphrases for stronger account security.
Nano ID Generator
Generate compact secure nano IDs with custom alphabet and length.
Random String Generator
Generate random strings for tokens, placeholders, and test data.
Slug Generator
Create clean SEO-friendly URL slugs from text.
Username Generator
Generate multiple username ideas with style and number options.
Productivity
4 tools
Quick Paste
Create secure shareable snippet links with expiry and optional password protection.
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.
UTM Builder
Build campaign tracking links with UTM parameters for analytics.
Fun
4 tools
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.