10 Free Developer Tools You Need in 2026

No signup. No ads. No tracking. Bookmark these.

1. JWT Debugger — Decode tokens instantly. See header, payload, expiration.
2. JSON Formatter — Beautify and validate. Find errors fast.
3. Base64 Encoder/Decoder — Handles Unicode properly.
4. UUID Generator — Generate v4 UUIDs in bulk.
5. Timestamp Converter — Unix ↔ human readable. Auto-detects format.
6. Regex Tester — Write, test, see matches instantly.
7. SSL Checker — Check cert expiry, issuer, validity.
8. Broken Link Checker — Find 404s and dead links. Free 10 scans.
9. Screenshot Generator — Screenshots from any URL + JSON-to-table.
10. AI Prompt Library — 50+ curated prompts for developers.

All tools are free, open source, and built by an AI agent.

Try them: luw8072-gif.github.io/bountyhunter/portfolio.html
Source: github.com/luw8072-gif