Best Free Testing Tools

Check SSR (server-side rendering) for any URL by visually comparing the server rendered version of the page with the regular version. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

A Dashboard for publishing automated test results and a Framework for implementing manual tests as code using GitHub. The service is [free for Open Source](https://github.com/marketplace/testspace-com) and accounts for 450 monthly results. Best for open source projects. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Open-source libraries for spinning up throwaway Docker containers in integration tests. Supports 50+ modules (databases, message brokers, AWS via LocalStack module). MIT license. Java, Go, .NET, Node.js, Python, Rust. Testcontainers Cloud bundled with Docker subscriptions (100 min/month on Docker Pro)

• −1 stale_verification We cannot confirm this offer: 2 consecutive re-check attempts have failed (most recently 2026-09-21 — The pricing page does not mention any specific free tier or bundled minutes with Docker subscriptions. It focuses on the open-source nature of Testcontainers and its capabilities, but lacks details about any deals or free usage limits. It's unclear if the previous deal still exists.), never confirmed since it was indexed. This is our inability to verify, not a change by the vendor. (a limit of ours, not a change by the vendor)

Load behvariour and page speed analysis and optimization tool. The free plan provides 10 tests per day, 5 experiments per week, and 15 GB of maximum ingested data per month. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Various free network and server tools. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Capture and inspect webhooks from your browser. Forward to localhost, or replay from history. Free to use. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Visual regression testing — 5,000 screenshots/month, unlimited users and projects, 30-day build history. Note: BrowserStack browser testing is trial-only; only Percy visual testing has a permanent free tier Best for unlimited usage needs. We could not read the page we cite for this offer when we last looked, on 2026-09-13, so we cannot confirm these terms today.

• −1 stale_verification We cannot confirm this offer: 2 consecutive re-check attempts have failed (most recently 2026-09-13 — page content too short (likely JS-rendered SPA); the rendering client failed: the rendering client did not finish in time), never confirmed since it was indexed. This is our inability to verify, not a change by the vendor. (a limit of ours, not a change by the vendor)

A continuous benchmarking tool suite to catch CI performance regressions. Free for all public projects. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Open source (MIT) Python-based load testing framework with distributed execution. Locust Cloud free tier: 200 VU-hours/month, max 100 concurrent virtual users. Best for open source projects. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

It's like CodePen but for cross-browser testing. UI-licious lets you write tests like user stories and offers a free platform - UI-licious Snippets - that allows you to run unlimited tests on Chrome with no sign-up required for up to 3 minutes per test run. Found a bug? You can copy the unique URL to your test to show your devs exactly how to reproduce the bug. Best for open source projects and unlimited usage needs. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-10, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-10, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

A free tool for developers and API testers to check if an API is CORS-enabled for a given domain and identify gaps. Get actionable insights. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Test your Android & iOS apps on this Cloud Based Android Phone / Tablets emulator and iPhone/iPad simulators directly in your browser. The free tier includes two concurrent session with 30 minutes of usage per month. No limit on app size. Best for unlimited usage needs. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Selenium Grid testing with a free plan of up to 4 simultaneous selenium nodes/10 grid starts/4,000 test minutes/month. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Test management system for Dev and QA teams. Manage test cases, compose test runs, perform tests, track defects, and measure impact. The free tier includes all core features, with 500MB available for attachments and up to 3 users. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Free on-page SEO website tester. 10 free website crawls per day. Useful SEO learning resources and recommendations on how to improve the on-page SEO results for any website regardless of technology. We could not read the page we cite for this offer when we last looked, on 2026-09-10, so we cannot confirm these terms today.

• −1 stale_verification We cannot confirm this offer: 2 consecutive re-check attempts have failed (most recently 2026-09-10 — HTTP 403), never confirmed since it was indexed. This is our inability to verify, not a change by the vendor. (a limit of ours, not a change by the vendor)

Official AWS Serverless Application Model CLI for local Lambda and API Gateway testing. Runs Lambda functions locally via Docker, emulates API Gateway, generates events. Open source (Apache-2.0). No AWS account required for local testing. Supports Python, Node.js, Go, Java, .NET, Rust runtimes Best for open source projects. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Keploy is a functional testing toolkit for developers. Recording API calls generates E2E tests for APIs (KTests) and mocks or stubs(KMocks). It is free for Open Source projects. Best for open source projects. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Desktop tool that records and replays the steps made in a web browser and creates scripts. The EveryStep Web Recorder is free; paid monitoring plans start at $38.99/month, with a 30-day free trial. We could not read the page we cite for this offer when we last looked, on 2026-09-10, so we cannot confirm these terms today.

• −1 stale_verification We cannot confirm this offer: 2 consecutive re-check attempts have failed (most recently 2026-09-10 — HTTP 403), never confirmed since it was indexed. This is our inability to verify, not a change by the vendor. (a limit of ours, not a change by the vendor)

Automatically create API and load tests by analyzing network traffic. Simulate up to 50 concurrent users for up to 60 minutes for free monthly.

• −1 stale_verification We cannot confirm this offer: 1 consecutive re-check attempt has failed (most recently 2026-09-19 — The pricing page does not explicitly mention a free tier with the described limits (50 concurrent users for 60 minutes). It focuses on a Computer-Using Agent (CUA) for mobile testing powered by AI, and highlights features like turning Jira stories into executable tests. While it mentions 'Generative AI for Test Automation' and offers a 'Book a Demo' option, there's no clear indication of a free tier with the specified characteristics. It's possible the free tier exists but isn't prominently displayed or is accessed through a different path.), never confirmed since it was indexed. This is our inability to verify, not a change by the vendor. (a limit of ours, not a change by the vendor)

Open source browser automation and testing framework. Self-hosted grid for parallel test execution across browsers. No usage limits. Best for open source projects. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Open-source Python library that mocks AWS services for testing. Covers 100+ AWS APIs including S3, DynamoDB, Lambda, SQS, SNS, IAM, EC2. Apache-2.0 license. No cloud component, no auth required. Drop-in replacement for boto3 calls in tests. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

Provides a testing platform that can help teams of all sizes at different levels of testing maturity, including Katalon Studio, TestOps (+ Visual Testing free), TestCloud, and Katalon Recorder. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

• −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)

holistic visual regression testing for your Storybook, Ladle, Histoire stories and Web Apps — Lost Pixel is sunsetting the product and building what's next. A 'Hobby Free' tier is available with 7,000 shots per month. Paid tiers include Startup ($100/mo, 40,000 shots), Business ($250/mo, 100,000 shots), and Scale ($670/mo, 300,000 shots). Best for personal projects and startups. Note — discovered 2026-08-28: Lost Pixel is being sunset as they are joining Figma. While a free tier still exists, it's now listed as 'Hobby Free' and offers 7,000 snapshots/month. There are also paid tiers: Startup ($100/mo), Business ($250/mo), and Scale ($670/mo). Source ↗

• −3 free_tier_withdrawn Recorded product deprecation on 2026-08-28: Lost Pixel is being sunset as they are joining Figma. While a free tier still exists, it's now listed as 'Hobby Free' and offers 7,000 snapshots/month. There are also paid tiers: Startup ($100/mo), Business ($250/mo), and Scale ($670/mo). Source: https://lost-pixel.com

AWS cloud emulator for local development — Hobby plan is free and includes 30+ emulated services, 1 personal sandbox, and CI testing. Base plan is $29/month (billed annually) or $35/month. Ultimate is $89/month. LocalStack for Snowflake also has tiers and pricing. Best for personal projects. Note — 2026-03-23: LocalStack drops open-source Community Edition. Single unified image requires auth token. Free tier replaced with non-commercial-only tier requiring registration. Commercial use requires paid plan starting at $39/month Source ↗

• −3 free_tier_withdrawn Recorded free tier removal on 2026-03-23: LocalStack drops open-source Community Edition. Single unified image requires auth token. Free tier replaced with non-commercial-only tier requiring registration. Commercial use requires paid plan starting at $39/month Source: https://blog.localstack.cloud/the-road-ahead-for-localstack/

AI-powered visual testing for Playwright, Cypress, Selenium and Storybook — no permanent free tier. Free trial; the Starter plan is $667/month paid annually, with unlimited users and 100,000 component checkpoints or 1,000 page checkpoints. Best for unlimited usage needs. Note — discovered 2026-09-03: The free tier no longer exists. The lowest tier is 'Starter' at $667/month, offering 100,000 component checkpoints or 1,000 page checkpoints. Source ↗

• −3 free_tier_withdrawn Recorded free tier removal on 2026-09-03: The free tier no longer exists. The lowest tier is 'Starter' at $667/month, offering 100,000 component checkpoints or 1,000 page checkpoints. Source: https://applitools.com/platform-pricing/
• −2 time_limited_offer Tier "Trial" is a trial that expires, not an ongoing free tier.