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A free Chrome extension that turns a click on a broken webpage element into a structured bug report (with screenshot, browser/OS context, console errors) pushed straight to Linear or Jira, instead of a back-and-forth email/Slack explanation.
FreeNo sign-up
What to know▼
How it works
Click to pin an element, captures CSS selector, coordinates, browser/OS/viewport/console errors, one click sends to tracker
What's different
Works anywhere Chrome can open a page, including localhost and behind VPN, no dashboard/account needed
We check every product on this page once a day and record whether it still answers.
A bug-capture tool that records a browser session, console errors, and network requests into one file that Claude Code, Cursor, or Windsurf can debug via a local MCP server.
FreeNo sign-up
What to know▼
How it works
Captures a session replay plus console/network evidence into an offline HTML file, then exposes it to AI coding agents through a local MCP server.
We check every product on this page once a day and record whether it still answers.
Regression testing for Claude Skills — catches when a model update silently breaks a trigger, an instruction gets ignored, or a redteam attack succeeds, and writes each failure as a permanent eval case instead of just failing CI. Also includes OWASP-mapped security lint, git-native bisect, and cross-model regression testing.
We check every product on this page once a day and record whether it still answers.
Frames your web page inside a real iPhone, Pixel, Galaxy or iPad simulation in your browser — true viewport, pixel density and touch signals, running 100% locally so localhost and logged-in pages just work.
Free
What to know▼
How it works
Runs entirely in-browser against 93 verified device profiles; includes screenshots, recording, side-by-side compare and environment spoofing.
Pricing
Free on Chrome, Edge and Firefox.
Best for
Developers and QA testing responsive design without physical devices.
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Records every decision an ML model makes with the exact inputs and context so it can be replayed and debugged later, self-hostable with a free community edition.
Free
What to know▼
How it works
Records the exact state that produced each model decision, allowing replay months later; supports incident debugging as a query, per-entity drift tracking, and training data joins without label leakage.
Pricing
Free Community Edition; runs on your own infrastructure.
Best for
ML teams needing to audit or debug model decisions after the fact.
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A free, signup-free hub covering the whole software interview prep journey (mock voice interviews, coding challenges, system design, resume) so developers stop juggling separate tools.
FreeNo sign-up
What to know▼
How it works
Practice with a live AI voice interviewer that adapts to your role and level, plus machine coding challenges under real timers, DSA patterns, frontend/backend system design roadmaps, company-tagged problems, JavaScript conceptuals, Git mastery, interview guides, and a resume builder.
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A bug-capture tool that logs console/network/video and routes fixes through an MCP workflow into Jira, Linear or Slack, plus free WCAG accessibility scans to reduce legal exposure.
Watch out · Also includes a free instant WCAG scan (axe-core + IBM Equal Access) plus human-backed accessibility audits, without overlay band-aids.
Free
What to know▼
How it works
Captures bugs with console/network logs and video, then routes them through an MCP workflow that can auto-trigger a fix and open a PR; integrates with Jira, Linear, and Slack.
Pricing
Free tier included.
Watch out
Also includes a free instant WCAG scan (axe-core + IBM Equal Access) plus human-backed accessibility audits, without overlay band-aids.
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Captures a bug's console/network logs and a screenshot from Chrome's side panel, drafts the report with AI, and sends it to your tracker — free, no signup.
FreeNo sign-up
What to know▼
How it works
Captures a bug's console/network logs, environment details and a screenshot from Chrome's side panel, lets you tweak CSS live for before/after comparisons, and drafts the report with AI before sending it to your tracker.
Pricing
Free, no account required.
Best for
Developers or QA reporting bugs who want logs and environment context captured automatically instead of typed by hand.
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Captures full runtime state the instant an error fires and replays it locally, feeding coding agents like Claude Code real debugging context instead of a bare stack trace.
Free
What to know▼
How it works
Captures the full runtime state the instant an error fires — stack, variables, network, DOM — and hands it to Claude Code, Cursor, or any MCP-compatible agent; install a 2-line SDK, then run `rv replay snap_id` to restore the local environment.
What's different
Unlike Sentry or LogRocket, it doesn't just show you what happened — it lets you replay the exact state locally.
Pricing
Free plan forever.
Best for
Developers debugging with AI coding agents who are tired of working from a bare stack trace.
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Your AI agent for autonomous web app testing
Free
What to know▼
How it works
Give it a URL and it explores your web app the way a real user would — mapping flows, finding bugs, and generating test cases; describe a flow in plain English and it tests it, and tests adapt on their own when the UI changes.
What's different
Self-healing tests that adapt automatically when the UI changes, and can run locally against apps behind a firewall or on localhost.
Pricing
Free tier open, no card required.
Best for
Developers who need automated web app testing, including apps on private networks or localhost.
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A free, on-device tool that lets you draw and talk over your screen so your AI coding agent sees exactly what you mean — built for Claude Code, Cursor and Codex users.
FreeNo sign-upWorks offline
What to know▼
How it works
Draw directly on your screen and talk while your coding agent watches, then get back annotated screenshots, a voice transcript, and a timeline of what you pointed at, all combined together.
What's different
Runs 100% on-device and works with Claude Code, Codex, and Cursor.
Pricing
Free, no account required.
Best for
Developers who need to show an AI coding agent a visual bug or layout idea instead of describing it in words.
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A free, keyless MCP database of verified step-by-step fixes and documented failure modes (like Stripe webhooks breaking) that AI agents can query before attempting a task.
Free
What to know▼
How it works
An MCP server that AI agents query before attempting a task; it returns verified 'routes' — step sequences plus documented failure modes (e.g. express.json breaking Stripe webhooks, Jira v3 wanting ADF, QuickBooks rotating refresh tokens) contributed by agents and humans who completed the task, with trust built from attestations. One MCP install works with Claude, OpenAI, LangChain, and CrewAI.
What's different
Reads are free and keyless, and it publishes 8,700+ routes across 2,100+ domains with live metrics.
Pricing
Reads are free and keyless.
Best for
Developers running AI agents that repeatedly hit the same known integration failures and want documented fixes up front.
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A tool for building and running automated integration tests across many API types — HTTP, SOAP, databases, message queues and more — for QA and engineering teams, not a hosted API itself.
Watch out · Data is saved offline on your local machine rather than in the cloud.
FreeWorks offline
What to know▼
How it works
A tool for building and running automated integration test cases across many API types — HTTP, SOAP, relational databases (Oracle, SQL Server, PostgreSQL, H2), JMS, FTP(S), SFTP, AMQP, MQTT, IBM MQ and IBM ACE. Includes HTTP stubs/mock servers, data-driven testing, endpoint management and Git-based team collaboration.
What's different
Covers many non-HTTP protocols and database types, not just REST/HTTP APIs.
Pricing
Free.
Best for
QA and engineering teams doing integration, microservices, ESB or SOA testing who need low-code test authoring.
Watch out
Data is saved offline on your local machine rather than in the cloud.
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Generates realistic fake data across 120+ fields and exports to CSV, Excel, JSON, SQL, XML or YAML — a free browser tool for developers testing forms or databases, no signup needed.
FreeNo sign-upCan export my data
What to know▼
How it works
Generates realistic fake data across 120+ fields and 15 templates, exporting to CSV, Excel, JSON, SQL, XML or YAML, running entirely in the browser.
Pricing
Free, no signup.
Best for
Developers who need placeholder data for testing forms or databases without creating an account.
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A keyboard-first issue tracker built for dev teams working alongside AI coding agents, linking to GitHub/GitLab/Gitea and exposing 40+ MCP tools so agents can file and resolve issues.
Free
What to know▼
How it works
A keyboard-first issue tracker with board, list, calendar, and roadmap views that links directly to GitHub, GitLab, and Gitea, catches duplicate reports automatically, and exposes 40+ MCP tools so agents in Cursor or Claude Code can search, file, and resolve issues.
Pricing
Free forever for solo devs; simple seat pricing for teams.
Best for
Dev teams that work alongside AI coding agents and want issue tracking reachable from their agent tools.
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A call-QA tool that scores 100% of sales or support calls against a script, instead of a manual sample, flagging missed phrases and coaching signals on a dashboard.
Free
What to know▼
How it works
Scores every call recording against a script, checking mandatory phrases and script stages (passed/partial/missed), with agent coaching signals on real-time dashboards.
Pricing
300 free minutes on your own recordings, no credit card.
Best for
Call centers wanting full QA coverage instead of manual sampling.
