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Text Diff Checker
Text Diff Checker
What is this tool?
The Text Diff Checker is a free, browser-based comparison tool. Paste your original text into one box and the revised text into another, and the tool highlights the differences between them so you can quickly review edits, track changes, or verify that two documents match.
When to use it
- Comparing two drafts of an article or email before sending
- Checking what changed between two versions of a contract or policy document
- Reviewing edits a colleague made to shared text
- Spotting differences between two snippets of code or configuration
- Verifying that a copied block of text matches the original exactly
How to use it
- 1Open the Text Diff Checker tool.
- 2Paste your original text into the first box.
- 3Paste the revised or comparison text into the second box.
- 4Review the highlighted differences — additions, deletions, and changes are marked visually.
- 5Copy or note the changes you need, then adjust your text as needed.
Frequently asked questions
Is my text sent to a server for comparison?
No. The comparison runs entirely in your browser using JavaScript, so your text never leaves your device.
Can I compare code snippets with this tool?
Yes. It works on any plain text, including code, since it compares text content line by line.
Does it show exactly which words changed, or just which lines?
The tool highlights the differing sections between the two texts so you can see what was added or removed.
Is there a limit to how much text I can compare?
There's no fixed limit, but very large blocks of text may take longer to process since everything runs on your device.
Do I need to create an account to use it?
No. The tool is free and requires no sign-up.