Developer Tools
A collection of 10 free developer tools built for programmers, engineers, and technical professionals. Whether you need to format JSON, decode a JWT, generate UUID values, convert number bases, or compute cryptographic hashes — all tools run directly in your browser with zero server-side processing. No login required, no data uploaded.
JSON Formatter
Format, validate and minify JSON
Base64 Encoder
Encode and decode Base64 strings
URL Encoder
Encode and decode URL components
Unix Timestamp
Convert between timestamps and dates
UUID Generator
Generate random UUID v4 values instantly — create up to 10 at once, copy one or all. No server needed, runs entirely in your browser.
Hash Generator
Compute MD5, SHA-1 and SHA-256 cryptographic hashes for any text instantly. Browser-side computation — no uploads, no server involved.
JWT Decoder
Decode and inspect JWT tokens without a secret key. View header algorithm, payload claims and expiry — useful for debugging API auth.
Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case and UPPER_SNAKE_CASE at once. Ideal for coding and API naming.
Number Base Converter
Convert integers between binary, octal, decimal and hexadecimal. Type in any field and all other bases update instantly.
HTML Entity Encoder
Encode and decode HTML entities — convert <, >, &, " and ' to their entity equivalents and back. Essential for safe HTML and template code.
Regex Tester
Test regular expressions with live match highlighting. Toggle g/i/m/s flags and inspect capture groups instantly — runs entirely in your browser.
Cron Expression Parser
Parse standard 5-field cron expressions into a human-readable schedule description and see the next 5 upcoming run times.
SQL Formatter
Format or minify SQL queries with support for Standard SQL, MySQL, PostgreSQL and more dialects, plus configurable indentation.
JSON to TypeScript
Paste any JSON and instantly generate matching TypeScript interfaces, with nested object and array type inference.
.gitignore Generator
Pick templates by language, framework, editor and OS to generate a merged, de-duplicated .gitignore file — copy or download instantly.