Keep your product on-brand, every commit.
Diffender reasons about consistency across your product's visual and interactive surface. It extracts your real design system, detects drift as it happens, proposes the reconciliation — and keeps designers and engineers speaking the same language.
How it works
From live app to reconciled design system
Diffender extracts your design system, reviews every change against it, and proposes the fix when a commit drifts — reasoning in your tokens, not pixels.
- 01
Extract the design system
Diffender reads your live app and lifts its real design system — colors, type, spacing, motion and components — straight from the deployed UI.
- 02
Review every change
On each commit it renders the diff and reasons about it against those tokens, classifying the change: accidental regression, intentional redesign, or platform constraint.
- 03
Reconcile the drift
When a change drifts off-system, Diffender explains why — in your tokens, not pixels — and proposes the on-token fix, keeping designers and engineers aligned.
Features
A design system that reviews itself
Detect drift, understand intent, and reconcile changes — all grounded in the tokens your product already ships.
Live design system
Your product's real tokens and components, extracted from the deployed app — a single source of truth for what “on-brand” means.
Drift detection
Every commit is checked against the system. Hardcoded values, off-scale spacing and out-of-palette colors get flagged before they ship.
Reasoned classification
Not a lint rule — a verdict with a confidence score that tells a regression apart from a deliberate redesign or a platform constraint.
Proposed reconciliation
For regressions, a ready-to-apply diff that reverts hardcoded values back to your design tokens.
Designers + engineers aligned
One shared language — the design system — so a change reads the same way to the person who drew it and the person who shipped it.
Before / after, side by side
See exactly what the change did to the rendered UI, with the reasoning attached to the commit that caused it.
And it films the demo, too
The same engine that drives your app to review a change can drive it to record one. Describe a flow and Diffender films a deterministic walkthrough — captions, voice-over and a shareable link — straight from your real components.
Auto captions
Synced, on-brand subtitles from the narration — readable with the sound off.
AI voice-over
A narrated walkthrough in a natural, optionally cloned voice.
Share analytics
Track views and unique viewers on every public link.
Ship fast without shipping drift.
Connect your app and let Diffender guard your design system on every commit.