Free Online Developer Tools
Fast, free and private. Every tool on this site runs 100% in your browser — nothing is uploaded, no account is needed, no waiting.
JSON Formatter & Validator
Format, minify and validate JSON instantly.
Unix Timestamp Converter
Convert between timestamps and readable dates.
Base64 Encoder / Decoder
Encode and decode Base64 with full UTF-8 support.
URL Encoder / Decoder
Percent-encode URLs and query strings safely.
UUID Generator
Generate secure version 4 UUIDs, one or in bulk.
Hash Generator
MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes.
Regex Tester
Test regular expressions with live highlighting.
Why use DevTools Hub?
- Privacy first - all processing happens locally in your browser. Your data never leaves your device.
- No sign-up - every tool is one click away, always free.
- Fast - a lightweight static site with no bloated frameworks.
- Developer-focused - tools picked for real, everyday dev workflows.
New tools are added regularly. Have an idea? Tell us.