Three Simple Steps
No complex setup, no learning curve. Just results.
Capture Screenshots
Add your website URL to ScanU. We automatically launch Chrome and Firefox browsers and capture full-page screenshots at 6 different resolutions covering desktop, tablet, and mobile devices.
- Parallel capture across browsers and resolutions
- Full-page screenshots, not just viewport
- Automatic baseline establishment on first run
- Secure URL validation to prevent abuse
Compare Changes
Our pixel-perfect comparison engine analyzes every screenshot against its baseline. Using advanced image diffing algorithms, we detect even the smallest visual changes while filtering out noise.
- Pixel-by-pixel comparison using Pixelmatch
- Configurable diff threshold per project
- Automatic noise filtering for anti-aliasing
- Highlighted diff visualization
Get Notified
Receive instant email notifications when visual regressions are detected. Review the changes in our intuitive comparison viewer, then accept or reject each difference with a single click.
- Instant email alerts for regressions
- Summary emails when tests complete
- One-click accept or reject actions
- Set new baseline when designs change
The Full Process
A deeper look at how visual regression testing works with ScanU.
Create a Project
Sign up for free and create your first project. Enter your website URL and optionally configure a diff threshold. That's all the setup you need.
Run Your First Test
Click "Run Test" to start capturing screenshots. Your first test run automatically becomes the baseline that future runs are compared against.
Screenshots Captured
We launch real browsers (Chrome and Firefox), navigate to your URL, and capture full-page screenshots at multiple resolutions. All screenshots are stored securely in the EU.
Make Changes & Retest
When you update your website, run another test. ScanU compares the new screenshots against your baseline and calculates the visual difference.
Review Differences
Use our side-by-side comparison viewer to examine any detected changes. Toggle between overlay and diff-only modes for different perspectives.
Accept or Reject
Accept intentional changes to update your baseline. Reject unintentional regressions to flag them for fixing. Full control over your visual testing workflow.
Perfect For
ScanU helps teams of all sizes catch visual bugs.
Freelance Developers
Catch CSS bugs before clients see them. Impress your clients with professional QA without the overhead.
Small Teams
Add visual testing to your workflow without dedicated QA resources. Everyone can review and approve changes.
Digital Agencies
Manage multiple client projects in one place. Prove your work quality with visual regression reports.