QAKit Toolbox

A toolbox of offline utilities for developers and QA engineers: JSON, JWT, regex, hashes, color picker, screenshots and more.

QAKit Toolbox is a single side-panel home for the small utilities every QA engineer and web developer reaches for ten times a day — without leaving your browser and without sending your data anywhere. Eleven tools, zero network calls: • JSON Formatter — format, minify, validate, and query with JSONPath (with autocomplete) • JWT Decoder — split, decode, and check expiry/not-before of JSON Web Tokens • Base64 / URL — encode and decode, with auto-direction detection • Unix Timestamp — convert between epoch and human-readable dates, any timezone • UUID Generator — v4, v7 and NIL, batch generation • Regex Tester — live match highlighting, capture groups, full cheatsheet • Hash Calculator — MD5, SHA-1, SHA-256, SHA-512, for text or files • Text Diff — side-by-side and unified, ignore whitespace/case • Clipboard History — auto-capture, search, pin important items • Color Picker — pick any color on screen, copy as HEX/RGB/HSL • Screenshot — capture the active tab, annotate with rectangles, highlights, arrows, lines, freehand pen, multi-line text, crop Built for QA workflows: • Available in 6 languages: English, German, French, Spanish, Russian, Italian • Light/dark/system themes • Persistent history that survives Chrome restarts • Keyboard shortcut to open the side panel anywhere • Export/import all your settings as one JSON file Privacy first: Everything runs locally. No analytics, no telemetry, no servers. Your data lives only in this extension's sandboxed storage. We can't read it, and neither can anyone else. Open source ethos — no upsells, no accounts, no tracking. Just the tools you need, one click away.