Text Diff

Compare two texts line by line with clear markers.

Runs locallyNo signupMobile readyCopyableFree

⇄Text Diff

All processing happens locally

Original

New text

Result (- removed, + added)

Text Diff is a line-based text diff tool, results are produced instantly with no page reload and nothing is sent to a server.

Paste your content, press the main button, then copy or download the output from the corner of the panel.

Paste or type your content into the input field at the top, or press the sample button to load demo data.
Adjust the options below the input, such as output format, separators, letter case or precision.
Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
When the result looks right, use the copy button in the corner, or download it as a local file.

Clean up stray spaces and line breaks before pasting for more accurate results.

Can it compare large texts?+

A few thousand lines work smoothly. For very long texts, compare in sections to keep the page responsive.

Are blank lines ignored?+

Blank lines are compared by default; strip them first if you want to ignore them.

Is Text Diff free to use?+

Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.

Is the text I enter uploaded anywhere?+

No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.

Does Text Diff work on a phone or tablet?+

Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.

Can I copy the result into my own document?+

Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.