Developer and Data Online Tools
Free online developer and data including JSON formatter, text compare, hash generator, Base64 encoder, URL parser, and more. With 49 IO Tools helps you quickly format, convert, encode, and work with data directly in your browser. Most tools run locally for speed and privacy, and most tool inputs are not stored on our servers. Some features that require storage (for example, Quick Paste) store data only to provide that feature. Built to keep useful tools simple, fast, and all in one place - dmlub2Ro
Developer and Data
49 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.
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.
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.
DNS Zone Parser
Parse DNS zone files into structured record summaries.
Markdown Table Builder
Build Markdown tables from CSV/TSV input quickly.
HTML Table Extractor
Extract table rows from HTML into CSV or TSV.
JSON Schema Sample Generator
Generate sample JSON payload from JSON schema.
Access Log Parser
Parse web access logs and summarize traffic patterns.
Email Header Parser
Parse raw email headers and summarize key fields.
HTTP Request Parser
Parse raw HTTP requests into structured JSON.
HTTP Response Parser
Parse raw HTTP responses into structured JSON.
CSV Random Sampler
Sample random rows from CSV input quickly.
Domain Extractor
Extract domains from mixed text and URL lists.
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.
INI Overlay Merger
Merge base and overlay INI files with override behavior.