Text Diff Checker
Compare two texts and highlight every added, removed and changed line or word. Private and instant.
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Runs entirely in your browser — nothing is uploaded
How to use the Text Diff Checker
- 1
Paste the original and the changed text
Or open two files.
- 2
Pick line or word mode
Additions are green, removals red.
- 3
Review the summary
Counts of added and removed lines.
Spot what changed between two versions of a contract, config file, essay or code snippet. Differences are highlighted line by line or word by word.
Read the full guide with screenshotsFrequently asked questions
Is the Text Diff Checker free?
Yes — completely free with no daily limit and no account. ZapMorph’s viewers and developer tools are unmetered.
Is what I type sent anywhere?
No. Everything runs in your browser with JavaScript. Nothing you enter is sent to our servers, which makes it safe for API keys, tokens and private data.
Does it work on my phone?
Yes. It works in any modern browser on iPhone, Android, Windows, Mac and Linux, with nothing to install.
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