Text Diff Viewer
Compare two texts and visualize the differences in unified or split view.
Free Web vs Desktop App
Web (Free)
- +Text Diff Viewer with basic functionality
- +No signup or account required
- +Works in any modern browser
- -Up to 5 KB per side on the web
- -Single tool per page, no integrations
Desktop App ($29 one-time)
- Unlimited size, integrated with Git client and AI agent output diff
- All 16 developer utilities in one ToolBox
- Plus terminal, HTTP client, database client, Docker manager
- AI agents, code editor, Git client, and 100+ more features
- macOS, Windows, Linux — one-time purchase, own forever
About Text Diff Viewer
Paste two texts side by side and instantly see the differences highlighted. Supports unified and split view modes. Added lines are shown in green, removed lines in red. Essential for comparing config files, API responses, code snippets, and deployment outputs.
Frequently Asked Questions
Is Text Diff Viewer free to use?
Yes! This online version is completely free with no signup required. Up to 5 KB per side on the web. For unlimited usage and full integration with 100+ developer tools, download the 1DevTool desktop app ($29 one-time).
Is my data safe?
Absolutely. All processing happens entirely in your browser. Your data never leaves your machine — nothing is sent to any server. The tool runs 100% client-side using JavaScript.
What do I get with the desktop app?
The desktop app includes Text Diff Viewer with no limits, plus 15 other developer utilities. Beyond the ToolBox, you get multi-agent AI terminals, HTTP client, database client (26 engines), Docker manager, Git client, code editor, browser preview, and more — all in one workspace. $29 one-time, no subscription.
Like this tool? There's a lot more.
Download 1DevTool to get Text Diff Viewer with no limits, plus 15 other utilities, AI terminals, HTTP client, database client, and 100+ features.