QAKit Toolbox

Offline dev & QA utilities in Chrome's side panel.

Thirteen small utilities that every QA engineer and web developer reaches for ten times a day — bundled in a single Chrome side panel. No accounts, no telemetry, no servers. Everything runs locally.

New in 0.2.0: Password Generator, a JSON → YAML converter, and a rebuilt Screenshot editor with blur, step numbers, emoji stamps, curved arrows, and full undo/redo.

Add to Chrome — Free

See it in action

Regex Tester with live highlighting, capture groups and cheatsheet — **Regex Tester** Live highlighting · capture groups · cheatsheet

JWT Decoder showing header, payload, signature and expiry — **JWT Decoder** Header · payload · expiry check

Home screen with tools grouped by category and a Recent section — **Home** All tools, grouped by category

Screenshot editor with step numbers, arrow and rectangle annotations — **Screenshot** Blur, step numbers, emoji, curved arrows

JSON Formatter in JSONPath mode with path autocomplete — **JSON Formatter** JSONPath with autocomplete

Password Generator with length slider and character-set options — **Password Generator** Strong passwords, flexible rules

JSON to YAML converter showing live conversion output — **JSON to YAML** Convert, copy, or download

What's inside

JSON FormatterFormat, minify, validate, JSONPath with autocomplete.

JSON to YAMLConvert JSON to YAML, copy or download.

JWT DecoderDecode and check expiry/not-before.

Base64 / URLEncode & decode with auto-direction.

Unix TimestampEpoch ↔ human-readable, any timezone.

UUID Generatorv4, v7, NIL — batch generation.

Password GeneratorStrong random passwords, flexible rules.

Regex TesterLive highlighting, capture groups, cheatsheet.

Hash CalculatorMD5, SHA-1, SHA-256, SHA-512 — text or files.

Text DiffSide-by-side or unified, ignore whitespace/case.

Clipboard HistoryAuto-capture, search, pin important items.

Color PickerPick any pixel on screen, HEX / RGB / HSL.

ScreenshotCapture, annotate (blur, steps, emoji, arrows), crop.

Why QAKit

Truly offline. No network requests, ever. We don't even have a backend.
Six languages — English, German, French, Spanish, Russian, Italian.
Side panel, not a popup. Stays open while you switch tabs.
Light, dark, and system themes.
Persistent history survives Chrome restarts. Export everything as one JSON.
Keyboard shortcut opens the side panel from anywhere (Alt+Shift+D by default).

Privacy

Your data lives only inside this extension's sandboxed storage. We do not collect, transmit, or sell anything. Read the full policy: