Developer Tools - JSON, UUID, Regex, Encoding & SEO Utilities

Developer Tools

Explore free online Developer Tools. Simple, fast and easy to use utilities for developers and daily tasks.

UUID Generator
Generate UUIDs (Universally Unique Identifiers) instantly with our free online tool. Supports UUID v4 (random) and v1 (time-based). Perfect for databases, APIs, and unique keys. No registration required.
Base Converter
Convert numbers between any base (binary, octal, decimal, hexadecimal, and more) with our free online base converter. Fast, accurate, and easy to use. No signup required.
JSON Formatter & Converter
Format, minify, validate, and convert JSON to XML or CSV with our free online JSON formatter. Fast, secure, and easy to use. No registration required.
Regex Tester
Test and debug regular expressions instantly with our free online regex tester. Real-time matching, syntax highlighting, and detailed match results. No registration required.
Text Diff Checker
Compare two texts side by side and find differences instantly with our free online text diff tool. Highlight additions, deletions, and changes. Perfect for code, documents, and text comparison. No registration required.
JWT Decoder
Decode JWT (JSON Web Tokens) instantly with our free online tool. View header, payload, and verify signature. Fast, secure, and no registration required.
JavaScript Tools
All-in-one JavaScript tools: beautify, minify, encrypt, decrypt, validate, and escape JS code. Fast, secure, and free. No registration required.
Timestamp & Timezone Converter
Convert Unix timestamps to human-readable dates and vice versa with our free online timestamp converter. Also convert between timezones instantly. Fast, accurate, and no registration required.
Token Calculator
Count tokens and visualize tokenization with our free online token calculator. Uses the same cl100k_base rules as OpenAI GPT-4 and GPT-3.5. Each token is color-highlighted for easy analysis. All processing is done locally in your browser β€” no text is uploaded.
Cron Expression Parser
Parse and explain any cron expression in plain English instantly with our free online cron parser. View the next 5 scheduled run times and use one-click presets for common schedules. Powered by cronstrue β€” no server required.
Base64 Encoder & Decoder
Free online Base64 tool to encode text, decode Base64 strings, and convert images to/from Base64. Fast, secure, and easy to use. No registration required.
HTML Escape / Unescape
Escape or unescape HTML special characters instantly with our free online tool. Convert HTML code to safe entities and back. Fast, secure, and no registration required.
Hash Generator
Generate MD5, SHA1, SHA256, SHA512, and SHA3 hashes from any text instantly with our free online hash generator. Fast, secure, and no registration required.
URL Parser & Encoder/Decoder
Parse, encode, and decode URLs instantly with our free online URL tool. View URL components (protocol, host, path, query, etc.), encode special characters, and decode encoded URLs. No registration required.
Morse Code Converter
Convert text to Morse code and Morse code back to text instantly with our free online tool. Easy to use, fast, and no registration required.
JSON ↔ CSV Converter
Convert JSON arrays to CSV and CSV back to JSON instantly with our free online tool. RFC 4180 compliant quoting, handles commas and quotes automatically. All processing runs in your browser β€” no file upload required.
Meta Tag Generator
Generate, validate, and preview meta tags for your website with our free online meta tag tool. Optimize SEO with proper meta descriptions, keywords, Open Graph, and Twitter Cards. No registration required.

FAQ

What are Developer Tools?

Developer Tools are online utilities designed to simplify common tasks quickly and efficiently.

Are these tools free?

Yes, all tools on this page are completely free to use.