DevToolab
Free online developer tools. No registration required.
UUID Generator
Generate UUID v1, v4, and v7 universally unique identifiers individually or in bulk (up to 100,000)
JSON Validator & Formatter
Validate JSON syntax, format with proper indentation, or compress by removing whitespace
JWT Decoder
Decode and inspect JSON Web Tokens (JWT). View header, payload, signature, and check token expiration
Hash Generator
Generate cryptographic hashes using MD5, SHA-1, SHA-256, SHA-384, and SHA-512 for text and files
Timestamp Converter
Convert between Unix timestamps and human-readable dates with support for multiple formats
Base64 Encoder / Decoder
Encode text or files to Base64, decode Base64 to text, and validate Base64 strings
Why DevToolab?
Privacy First
All tools run locally in your browser. Your data never leaves your device.
Fast & Simple
No sign-up required. Just open and start using the tools instantly.
100% Free
All tools are completely free to use. No hidden fees or limitations.