Diffchecker
Operator: Checker Software Inc.
Compares images and screenshots, highlights pixel differences and also compares text, documents and spreadsheets.
Image, Video & Geo
Comparisons saved on the web and shared by link can be viewed by anyone with that link.
Product
Availability and source date
As of: 25 October 2026.
Check: 25 October 2026.
Image comparison of two self-created PNG test graphics.
An additional area was highlighted, with 1,681 changed pixels (10.51%) and one change region displayed.
Use in OSINT research
Compares versions of images, screenshots and documents. Highlighted differences, overlays and metadata help identify changes between two files.
Queries
| Input | Result | Result type |
|---|---|---|
| Image | Highlighted pixel differences and change regions between two images, with optional text and metadata comparison. | Derived |
| Document / file | Comparison of text, formatting and content between two document versions. | Derived |
Features
- Highlights pixel differences and groups them into change regions.
- Compares images side by side, as an overlay, with a slider or as a difference image.
- Aligns images automatically or manually before comparison.
- Compares recognised text in images and file metadata, including EXIF.
- Exports image comparisons as PNG.
- Also compares text, Word/PDF documents and spreadsheets; the desktop application processes files offline.
Categories
- Image, Video & Geo
- Image forensics & deepfake detection
Coverage
Dataset
Access
Installation and deployment
Web comparison and a separate locally installable desktop application. According to the image FAQ, image comparison runs in the browser.
Requirements
Export
Provider
Country of establishment
Interfaces
API
MCP
AI agents
Legal note
Limitations
- The free plan limits PNG export to five attempts per month.
- Saving and sharing require an account.
Guides and practical reports
Official · Diffchecker: API introduction
Checker Software Inc. · EN
Explains authentication, allowances and comparison endpoints.