Text Difference Checker

A text difference checker compares two versions of text and highlights additions, removals, and edits. TextDiffTool lets you inspect those differences by word, character, or line.

Paste your original text into the first editor and your modified text into the second. Choose Word, Character, or Line, then click Compare text to see the differences.

Copy the text from each document into the Original text and Modified text editors, then click Compare text. You can also import plain-text files. The comparison checks text content, rather than document formatting or page layout.

Yes. TextDiffTool is a free online text comparison tool with no account, subscription, or payment required. You can compare text, import files, review changes, and export results for free.

Paste both versions, select Word under Compare by, and click Compare text. Word by word text comparison highlights added and removed words so you can review wording changes in context.

Add both versions, select Line under Compare by, and click Compare text. Line by line text comparison highlights added and removed lines, which is useful for lists, logs, and source code.

Use Upload file in each editor, or drop a UTF-8 plain-text file into each side, then click Compare text. Supported files include TXT, Markdown, CSV, JSON, and source code. Each side supports up to 500,000 characters and 10,000 lines.

A text diff checker is another name for a text difference checker. It shows the changes needed to turn an original text into a modified version, using highlights for additions and removals.

Compare the versions in Word mode. Added words appear in green with an underline, while removed words appear in red with a strikethrough. A replacement appears as removed wording followed by added wording.

Yes. TextDiffTool runs in your web browser with no software installation or browser extension required. Open the website with JavaScript enabled, paste both texts, and click Compare text.

Paste the earlier draft into Original text and the revised draft into Modified text. Use Word mode to review wording changes, then navigate between differences. You can copy the text diff or download an HTML report.

Word comparison highlights changes to individual words and suits articles or drafts. Character comparison reveals smaller edits to letters, digits, and punctuation. Line comparison shows changes to whole lines and suits logs, lists, and code.

Yes. Switch to Code to use TextDiffTool as an online code diff checker. Paste or import two source files and compare them with syntax highlighting. Your code is compared as text and is not executed.

Select Code, put the original code in the first editor and the revised code in the second, then click Compare text. Choose Line for whole-line edits, Word for changed tokens, or Character for small changes to identifiers and punctuation.

TextDiffTool processes comparisons and reads imported files locally in your browser; your text is not uploaded to a server or included in URLs. Drafts are saved only when you choose and stay in that browser until you delete them or clear browser data.