Developer Tools
Format and validate JSON, encode Base64 and URLs, convert Unix timestamps and generate UUIDs — all inside your browser.
23 tools in this category
JSON Formatter
Pretty-print or minify JSON, with the exact position of any syntax error.
JSON Validator
Check whether a document is valid JSON and get the line, column and reason when it is not.
Base64 Encoder / Decoder
Encode and decode Base64 text or files, including data URLs.
URL Encoder / Decoder
Percent-encode or decode URLs and query string components.
Unix Timestamp Converter
Convert between Unix time and human dates in any timezone.
UUID Generator
Generate cryptographically random UUID v4 values in bulk.
JSON Minifier
Strip whitespace from JSON to produce the smallest possible payload.
JWT Decoder
Decode and inspect JWT header, payload and signature without a secret.
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text.
HTML Encoder / Decoder
Encode special characters as HTML entities and decode them back.
Regex Tester
Write and test regular expressions against sample text with live highlights.
Password Generator
Generate strong, cryptographically random passwords with custom rules.
Color Converter
Convert colors between HEX, RGB and HSL instantly with a live preview.
Markdown to HTML
Convert Markdown to HTML with a live preview. Expose it as an API.
Text Diff Checker
Compare two texts side-by-side and highlight additions, deletions and changes.
SQL Formatter
Format and beautify SQL queries for MySQL, PostgreSQL, SQLite and more.
XML Formatter
Format, indent and validate XML documents in your browser.
Number Base Converter
Convert numbers between decimal, hexadecimal, binary and octal instantly.
URL Parser
Parse any URL into its components: protocol, host, path, query params and hash.
Cron Expression Parser
Translate CRON expressions into human-readable schedules with next run times.
Chmod Calculator
Calculate Unix file permissions visually and get the chmod octal and symbolic notation.
JSON Diff
Compare two JSON objects and highlight added, removed and changed keys.
CSS Minifier
Remove whitespace and comments from CSS to reduce file size.