Can it compare Word or PDF?

This tool compares plain text. Copy the content out as text first, then paste it in.

Is it line or character based?

Line based, which fits most copy and code cases; a small in-line change shows as a removed line plus an added line.

Are my files or data uploaded?

No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.

Do I need to sign up or pay?

No. The site is completely free, needs no account and has no usage limits.

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🆚Text Diff - Online Text Comparison / Diff Tool

Compare two blocks of text line by line to find added, removed and unchanged lines with color highlighting. Built on a longest-common-subsequence algorithm for clear results. Optionally ignore case or leading/trailing whitespace. Great for checking copy changes, config differences and code snippets, all locally.

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How to use Text Diff

1Paste the original text on the left
2Paste the changed text on the right
3Read the highlighted diff below

FAQ

Can it compare Word or PDF?: This tool compares plain text. Copy the content out as text first, then paste it in.
Is it line or character based?: Line based, which fits most copy and code cases; a small in-line change shows as a removed line plus an added line.
Are my files or data uploaded?: No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.
Do I need to sign up or pay?: No. The site is completely free, needs no account and has no usage limits.