Developer Tools
Regex, cron, HTTP references, and everyday dev helpers.
JSON Formatter
Beautify and format JSON with configurable indentation.
JSON Validator
Validate JSON syntax and surface errors with line numbers.
JSON Minifier
Remove whitespace from JSON to reduce payload size.
JSON Diff
Compare two JSON structures and see what changed.
JSON Path Finder
Click any value in your JSON to copy its path.
Base64 Encode / Decode
Encode text or files to Base64 and decode them back.
URL Encode / Decode
Percent-encode URLs and query parameters, and decode them.
JWT Decoder
Decode and inspect JWT header and payload.
JWT Debugger
Decode, verify, and edit JWTs with a signing secret.
UUID Generator
Generate v4 UUIDs in bulk — up to 100 at a time.
Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes.
HMAC Generator
Compute HMAC signatures with a shared secret.
QR Code Generator
Turn any text or URL into a downloadable QR code.
Random Number Generator
Generate random numbers with configurable ranges.
Case Converter
Convert text between camelCase, snake_case, kebab-case, and more.
Slug Generator
Turn any text into a clean, URL-safe slug.
Text Diff
Compare two blocks of text side-by-side.
Markdown Preview
Live split-pane Markdown editor with HTML preview.
String Escape / Unescape
Escape strings for JSON, HTML, URL, JavaScript, or SQL.
Regex Tester
Test regular expressions with live match highlighting.
Cron Expression Parser
Translate cron expressions into plain English.
CSS Minifier
Minify CSS to reduce file size.
JavaScript Minifier
Minify JavaScript with variable mangling.
SQL Formatter
Format and beautify SQL queries.
HTML Prettifier
Format and indent HTML for readability.
HTTP Status Codes
Searchable reference for every HTTP status code.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
Unix Timestamp Converter
Convert Unix timestamps to and from human dates.
URL Parser
Break a URL into protocol, host, path, query, and hash.
User Agent Parser
Extract browser, OS, and device from a UA string.
SVG Optimizer
Remove unused metadata and shrink SVG file size.
Percentage Calculator
Compute percentages of, from, and between numbers.
Date Difference Calculator
Calculate time between two dates in multiple units.
Byte / Data Size Converter
Convert between B, KB, MB, GB, TB, and PB.
Aspect Ratio Calculator
Solve for width or height given a target aspect ratio.
Text to Binary
Convert text to binary and back, bit by bit.
IP Address Inspector
Validate and classify IPv4 and IPv6 addresses.
chmod Calculator
Toggle Unix permissions and get the numeric chmod value.
HLS m3u8 Parser
Parse HLS master & media playlists — variants, renditions, segments, SCTE-35 ad markers.
WebSocket Tester
Interactive WebSocket client — connect, send text or binary, inspect every message.
MIME Type Lookup
Search IANA MIME types by extension, type, or description — category filters included.