Sharajdev

Chrome Web Store • 27 Free Developer & QA Tools

Free Chrome extensions for developers & QA who
build and break things.

A curated marketplace of focused, free Chrome extensions for developers and QA engineers — AI test case generation, API testing from live network traffic, flow recording, GitHub repo inspection and more. Each one does a single job well.

Free · Manifest V3 · Source code on GitHub · Chrome, Edge, Brave & Arc

Extension Catalog

Recently updated: Refract SEO · RepoSpector · QAtalyst · Sherpa · Hotshot · Pathfinder

Free

QAtalyst

AI Test Case Generator

Turn any feature, user story or requirement into structured test cases — positive, negative, edge and boundary scenarios — in seconds. Stop writing QA test cases by hand.

Add to Chrome Explore QAtalyst →
Free

XHRScribe

AI API Test Generator

Capture live XHR and fetch network traffic and auto-generate runnable API tests with AI — payloads, headers and assertions included. No hand-written requests.

Add to Chrome Explore XHRScribe →
Free

FlowScribe

UI Test Script Generator

Record clicks, inputs and navigation in the browser and turn them into ready-to-run UI test scripts — no manual selector writing or test boilerplate.

Add to Chrome Explore FlowScribe →
Free

APItiser

Integration Test Generator from Code

Generate integration tests straight from your code — APItiser reads your API endpoints and produces runnable tests with request setup and assertions, no hand-writing required.

Add to Chrome Explore APItiser →
Free

RepoSpector

AI Code Review & Code Query Engine

AI-powered code review plus a natural-language query engine for any repository — get review feedback and ask questions about the codebase right on the page.

Add to Chrome Explore RepoSpector →
Free

Gotcha

One-Click Bug Reports

File a complete, reproducible bug — screenshot, console, network, auto-recorded repro steps and DOM snapshot — into Linear or Jira. Every report ships with a runnable Playwright regression test.

Add to Chrome Explore Gotcha →
Free

Telltale

API Drift & Schema Detector

Passively learns your API's contract from real browser traffic and tells you the moment a response drifts — missing fields, type changes, unexpected nulls and more. Local-first, zero config.

Add to Chrome Explore Telltale →
Free

Mockingbird

Mock & Edit HTTP Traffic

Hold, edit and mock a tab's HTTP traffic from a side panel — breakpoints, passthrough rewrites, replay and HAR export — with no backend, no account and no setup.

Add to Chrome Explore Mockingbird →
Free

StyleSpy

CSS & State Inspector

Inspect CSS of static, hidden and dynamic elements. Freeze hover/focus states, reveal ghost DOM, track mutations — and copy ready-to-use selectors and XPath for Selenium, Playwright and Cypress.

Add to Chrome Explore StyleSpy →
Free

LingoAI

Localization (l10n/i18n) QA

Audit the localization quality of any page — untranslated strings, clipped UI, grammar and formatting — with severity, a suggested fix and on-page overlays. Local-first, export to Jira/GitHub.

Add to Chrome Explore LingoAI →
Free

litmus

System Prompt Tester

Test, analyze and version system prompts against the LLM you ship on — LLM-as-judge rubrics, deterministic tool/agent checks, variance and speed metrics. Local-first, BYOK, no backend.

Add to Chrome Explore litmus →
Free

PerfLens

Real-Session Performance Observer

Reads page timing locally from real user sessions — Core Web Vitals, long tasks, layout shifts, and resource weight — and sends nothing anywhere. DevTools panel & score popup.

Add to Chrome Explore PerfLens →
Free

speeDB

Grounded DB Query Optimiser

Scan any GitHub or GitLab repo for database queries and get grounded, output-identical rewrites re-verified against your actual codebase before you see them.

Add to Chrome Explore speeDB →
Free

Briefly

Speech ⇄ Text

Two-way speech and text in any tab: dictate with speech-to-text, and read articles, docs or emails aloud with natural text-to-speech. Great for accessibility and multitasking.

Add to Chrome Explore Briefly →
Free

PingMeet

Meeting Reminders

Smart, lightweight meeting reminders right in your browser so a call never sneaks up on you. Timely pings keep you on schedule without a heavy calendar app.

Add to Chrome Explore PingMeet →
Free

Pathfinder

Autonomous UI Test Exploration

Autonomously explores your web app's UI — mapping screens and flows to surface untested paths and build exploratory UI test coverage without a written script.

Add to Chrome Explore Pathfinder →
Free

skiller

Auto Skill Generator for Jira Tickets

Automatically turns your Jira tickets into reusable skills — converting ticket requirements into ready-to-run automation without manual setup.

Add to Chrome Explore skiller →
Free

EngGauge AI

Engineer Skill Assessment

Evidence-based engineer skill assessment from GitLab & GitHub review data. Your keys, your browser, no backend — every claim cites a specific pull or merge request.

Add to Chrome Explore EngGauge AI →
Free

Sherpa

Local Help Search

Crawl a documentation site, index it entirely in your browser, and answer questions from that index with source citations — zero servers, zero per-query cost.

Add to Chrome Explore Sherpa →
Free

SignalX

AI News Summarizer & Reader

Read BBC, Reuters, CNN and more in one fast side panel. Compare how sources cover the same story and get instant AI summaries with your own API key — OpenAI, Claude or Gemini.

Add to Chrome Explore SignalX →
Free

ForgetMeNot

Sticky Notes & Notepad

Fast, private sticky notes and notepad in your browser. Quickly save, organize, search and pin notes offline — zero cloud sync, zero tracking, no account needed.

Add to Chrome Explore ForgetMeNot →
Free

Daybook

Local-First Task List

A local-first task list built around a morning brief and an end-of-day check. No account, no server, no network access — 100% on-device in your browser.

Add to Chrome Explore Daybook →
Free

Hotshot

Exact Screenshot & Element Capture

Capture elements, custom regions, or full scrolling pages with on-page markup, true pixel redaction, and direct export to Jira or Notion. 100% on-device.

Add to Chrome Explore Hotshot →
Free

Tracely

Trace Bugs to Code & Flows

Trace reported bugs to exact repository lines and broken user flows. Use local Ollama or your own API key to diagnose root causes with test verification.

Add to Chrome Explore Tracely →
Free

GitScribe

LLM Repo Digests & Code Maps

Turn GitHub or GitLab repos and PRs into token-budgeted LLM digests. Generate hallucination-checked architecture READMEs with zero tracking or telemetry.

Add to Chrome Explore GitScribe →

Browse by job: QA testing · API testing · AI developer tools · Guides · More from Sharaj (games, shopping, focus)

Free Chrome extensions built for developers and QA engineers

This is a small, curated collection of Chrome extensions for the people who spend their day in the browser doing real engineering work — software developers, QA engineers, SDETs and testers. The focus is the testing and API workflow: generating test cases from a feature description, turning captured network traffic into runnable API tests, generating UI and integration test scripts, exploring UIs autonomously, and AI-assisted code review — all without leaving the page.

Every extension is free on the Chrome Web Store and built to do one job well, rather than be a bloated all-in-one platform. Whether you need an AI test case generator, an API testing Chrome extension that writes tests from real traffic, or a way to record and document browser flows, there is a purpose-built tool above. They run in Chrome and any Chromium browser, and new extensions are added regularly.

What you can do with these extensions

Who builds these

I'm Sharaj Rewoo. I work on software quality and test automation, and I build these extensions to take the repetitive parts out of my own day: writing test cases, turning traffic into API tests, filing reproducible bugs and checking performance. Every tool starts as something I needed on a real project, and I keep updating the ones people use — the update dates above come straight from each Chrome Web Store listing.

You can reach me on LinkedIn or through the contact form below.

Frequently asked questions

Are these Chrome extensions free?
Yes — every extension here is completely free to install from the Chrome Web Store, with no paid tier required to get started.
Which extension generates test cases?
QAtalyst is the AI test case generator — give it a feature, user story or requirement and it produces structured positive, negative and edge-case scenarios. To generate API tests from real network traffic instead, use XHRScribe.
How does the AI API test generator work?
XHRScribe records the XHR and fetch requests your app makes as you use it, then uses AI to turn that captured traffic into runnable API tests — including payloads, headers and assertions — so you don't write them by hand.
Do these extensions work in Edge, Brave or Arc?
Yes — they run in any Chromium-based browser, including Microsoft Edge, Brave, Arc and Opera, in addition to Google Chrome.
Is my data safe?
Each extension requests only the permissions it needs to function. You can review the exact permissions and privacy details on every Chrome Web Store listing before you install.
Who builds Sharaj dev?
Sharaj dev is an independent collection of developer and QA extensions, built and maintained by Sharaj Rewoo and published on the Chrome Web Store. The source for every extension is on GitHub at github.com/srewoo.