Automate visual testing without writing code
Zero code. Zero setup. Zero excuses.
Install the app. Open your site.
Browse normally, we capture everything.
Run it again tomorrow: every difference shows up.
Built to understand change — calmly
Clear results. No noise.
Record without coding
Browse your site normally. Delta-QA captures your actions automatically.
Replay in one click
Run your scenarios whenever you want. Tests execute on their own.
See what changed
Side-by-side visual comparison. Differences are highlighted automatically.
Why it feels different
- No code to write
- No selectors to maintain
- No mandatory cloud
Good engineering doesn't shout.
It just keeps things under control.
Visual and functional comparison — side by side
See layout changes.
See behavior changes.
See content changes.
If a pixel moved, you'll see it.
If nothing moved, you'll see that too.
What Delta-QA detects
429 validated test cases. 0 false positives.
One scenario. Multiple browsers.
Because users have opinions.
Browsers too.
Control is not optional
Whether you run tests locally, on-premise, or in the cloud:
- Your data stays yours
- Your tests remain accessible
- Nothing is hidden behind black boxes
We like to know where things run.
And where data lives.
Built in France. Designed for trust.
We take privacy seriously.
It's a European thing.
Frequently Asked Questions
Everything you need to know about Delta-QA
Delta-QA is a free visual regression testing tool that automatically detects visual changes on your web pages by comparing screenshots pixel by pixel. The desktop version is completely free with no limitations.
Yes, Delta-QA desktop is completely free for macOS and Windows. No signup, no credit card, no time limit. Team and Business plans with advanced features are coming soon.
Delta-QA is available for macOS and Windows. Cloud and On-Premise versions are coming soon. Interested? Let's talk!
Delta-QA requires no coding. Simply record your user journeys by browsing normally, then replay and compare automatically. No scripts, no configuration files, no command line.
Delta-QA keeps everything on your machine. No mandatory cloud, no dependency on external services. Your screenshots, reports and comparisons never leave your computer. On-Premise option also available for enterprise servers. Contact us
Delta-QA renders both versions in a real browser and compares the result pixel by pixel. It detects 38+ categories of CSS changes including colors, typography, layout, borders, animations and responsive breakpoints — with zero false positives.
Delta-QA compares web pages pixel by pixel using a 5-pass structural matching algorithm. Unlike text diffs, it detects real visual differences that users see on screen: shifted elements, color changes, font differences, spacing issues.
With Delta-QA, record your user journeys by simply browsing your site. The tool captures each step, then replays and compares automatically. No test frameworks, no code — just browse and click.
A text diff compares source code line by line and misses CSS rendering differences. A visual comparison like Delta-QA renders both pages in a browser and compares the actual result pixel by pixel, detecting the real differences users see on screen.
Delta-QA uses a Git-like 5-pass structural matching algorithm that achieves zero false positives across 429 validated test cases. Each detected change includes a strength score (0-100%) so you can filter minor variations and focus on real regressions.
We don't just run tests.
We keep receipts.
And we know where they're stored.