Diff Checker
Compare two texts and see exactly what was added, removed or changed, line by line and word by word.
Runs in your browser. Nothing is uploaded.
Loading the tool…
How to use it
- Type or paste your text
- Adjust the options if you want to
- Copy or download the result
Worth knowing
- Turn on “Show only changes” for long texts: unchanged stretches fold away.
- Use “Copy patch” to share the differences with developer tools such as git.
- You can open text files straight into either side with “Open a file”.
Questions
Does it compare line by line or word by word?
Both. Lines are matched first, then the words inside each changed line are compared so only what changed is highlighted.
How big a text can I compare?
Thousands of lines are fine. Two texts that are almost completely different are shown line against line without matching them up.
Is my text uploaded anywhere?
No. Everything happens in your browser, on your device. What you type is never sent to our servers.
More in Count & Analyze
Word Counter
Count words, characters, sentences and paragraphs as you type, with reading time and top keywords.
Character Counter
Count characters with and without spaces, and check your text against limits like X, SMS and meta descriptions.