Diffchecker

Diffchecker compares two texts or files and shows their differences. Besides plain text and code (for example JSON or XML), it compares images, documents such as PDF and Word files, Excel spreadsheets and folders.

The web version can be used for free in the browser. A desktop application for Windows, macOS and Linux runs comparisons offline, so that files never leave the computer, and adds folder and batch comparison and an AI summary of differences.

Diffchecker is a commercial service. The basic web plan is free with limited access to Pro features. The Pro plan with the desktop app and the Enterprise plan with single sign-on are paid per user.