Visual diffs without the false positives.
Tolvox is visual regression testing for Storybook. We only take a screenshot when a component actually changed, so you only pay for real diffs.
Launching soon
See what your pull request changed
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0.27% pixels changed
This is the actual Tolvox review UI, showing a real diff captured through the real pipeline. It's interactive. Try it out.
Everything you need for visual review
Built for teams that ship UI fast and can't afford visual regressions reaching production.
Visual diff
Flip between before and after, or let it auto-flicker, to see what changed. The overlay diff image highlights changed pixels so even subtle changes are obvious.
CSS property diff
See exactly which CSS properties changed (colour, font size, padding), not just that pixels moved. No guessing.
Carry-forward approvals
Already approved a change? If it's pixel-identical in the next build, Tolvox auto-approves it. Only review what's actually new.
Render error details
When a story fails to render, the full component stack trace is shown in the review UI. Diagnose the issue without checking out the branch.
No false positives
Every diff you're asked to review is a real, confirmed visual change, never a flaky render or a rebuild artifact. When Tolvox flags something, it's worth your time to look.
Smart change detection
A dependency-graph analysis narrows down which stories your change could possibly affect. Of those, only the ones with an actual rendered difference get a full screenshot, keeping CI fast even in large design systems.
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