Text diff checker
Compare two text blocks side by side. Insertions and deletions are highlighted locally.
No uploads. No account. Free to use.
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- Files never leave your device
- Runs entirely in your browser
- No signup required
- Free
What is Text diff checker?
A text diff checker compares two strings and highlights insertions and deletions with a client-side diff library.
How to use it
- Paste original and changed text.
- Compare to see insertions and deletions.
- All diffing stays in the browser.
When to use it
Copy, contracts, and patches should not be pasted into a hosted diff product if the wording is confidential.
Frequently asked questions
Are my files uploaded?
No. This tool runs in your browser. Files and text stay on your device and are not sent to our servers.
Does this use AI?
No. It is a deterministic utility. There is no model and no third-party processing of your data.
Related tools
More in Text tools.