Developer Utilities

Small browser-side utilities for everyday engineering tasks. No data leaves your machine.

Runs entirely in your browser. No data sent to any server.

Text

Regex Tester

Live match highlighting and capture group table.

Encoding

Base64

UTF-8 safe encode and decode in the browser.

Web

JWT Decoder

Inspect header and payload; expiry countdown (no signature verify).

Data

JSON Formatter

Pretty-print or minify JSON with instant validation errors.