Developer Toolkit: URL, Timestamps, UUID & JWT

WaiHub now offers six in-browser developer tools: JSON formatter, Base64 codec, URL encoder/decoder, Unix timestamp converter, UUID generator, and JWT decoder. This guide focuses on the last four and when to reach for each.

URL encoding & decoding

Query strings, redirect URLs, and API payloads often need encodeURIComponent or decodeURIComponent. WaiHub supports component-level and full-URL encoding, plus Query ↔ JSON conversion.

Typical uses: debugging OAuth callback URLs, parsing name=value pairs, turning JSON configs into query strings.

Unix timestamp conversion

Logs, databases, and APIs frequently return Unix timestamps in seconds or milliseconds. The converter auto-detects second/ms/µs/ns lengths and shows UTC vs local time plus ISO 8601 output.

When debugging timezone issues, compare UTC and local side by side — and watch for 10-digit seconds vs 13-digit milliseconds.

UUID generator

Generate UUID v4 for test primary keys, session IDs, or trace IDs. Batch mode supports uppercase, braceless, and braced formats with copy or .txt download.

The single UUID at the top is independent from the batch list — grab one or generate many without cross-contamination.

JWT decoder

Paste a Bearer token to inspect Header, Payload, and exp/iat expiry status during OAuth or API debugging. Decoding is not signature verification — never paste production tokens into untrusted sites.

See our JWT Security Best Practices article for production hardening tips.