Local-first
Images and comparison results stay in this browser and are not sent to an external server.
About Visual Diff Tool
Product scope, local-first privacy, and supported comparison modes.
What you can do
Visual Diff Tool is a local-first tool for comparing Before and After images entirely in your browser.
Use Slider, Overlay, Split, Diff, and Blink modes with alignment and diff-region inspection.
Slider · Overlay · Split · Diff · Blink
Key features
Five view modes
Review differences with Slider, Overlay, Split, Diff, and Blink.
Alignment and diff regions
Correct image offsets and inspect changed regions through metrics and a navigable list.
History and offline use
Save comparison sessions on this device and keep working offline after the app loads.
Supported formats and limits
| Format | Limit | Availability |
|---|---|---|
| PNG | 100 MB / 50 MP | Supported |
| JPEG / JPG | 100 MB / 50 MP | Supported |
| WebP | 100 MB / 50 MP | Supported |
| AVIF | 100 MB / 50 MP | Supported |
| HEIC / HEIF | — | Unavailable in this release |
Privacy
Image Blobs, comparison settings, and diff results are stored in IndexedDB in this browser and are never uploaded to a server.
Developer
GitHub — @ishiyama0530opens in a new tabVisual Diff Tool is maintained as a small, local-first open-source project.