Text Diff Checker – Compare Two Texts Online Free
About the Text Diff Checker
The Text Diff Checker compares two blocks of text and highlights exactly what’s changed between them. Paste your original and revised text, choose a comparison mode, and the tool instantly shows added and removed content with clear color-coded highlighting — no manual proofreading required.
This tool is built for writers, developers, editors, and SEOs who need to spot changes between two versions of content quickly, whether comparing edited articles, revised code snippets, or updated page copy. With line, word, and character comparison modes plus an ignore-case option, you get exactly the level of detail you need. If you’re comparing cleaned-up text, you may also find our Remove Duplicate Lines and Case Converter useful before running a comparison.
Our team compared different versions of articles, code snippets, and plain text to verify that additions, removals, and edits are highlighted accurately across all comparison modes.
Choose Line mode to compare full paragraphs or blocks of text and quickly spot which entire lines were added, removed, or changed — ideal for articles and documents. Choose Word mode to compare text word-by-word, useful for catching smaller edits like rewordings within a sentence. Choose Character mode for the most detailed comparison, highlighting even single-letter changes — best for short strings, code snippets, or typo-checking.
How to Use the Text Diff Checker
- Paste your original text into the Original Text box.
- Paste your revised text into the Changed Text box.
- Choose a comparison mode: Line (full lines/paragraphs), Word (word-by-word), or Character (letter-by-letter).
- Enable Ignore Case if you want uppercase and lowercase letters treated as identical.
- Click Compare Texts to generate the results.
- Review the highlighted output — added content is shown in green, removed content in red.
Need to compare URL lists instead of text? Try our URL List Comparator to quickly find missing or matching links.
Frequently Asked Questions
A text diff checker compares two versions of text and highlights exactly what was added, removed, or changed between them, making it easy to spot edits at a glance.
Line mode compares text line by line and is best for spotting changes across full paragraphs or documents. Word mode compares individual words, making it useful for catching rewordings within a sentence. Character mode compares text letter by letter, offering the most granular detail — ideal for short strings, code snippets, or typo-checking.
When enabled, it treats uppercase and lowercase letters as identical, so “Hello” and “hello” won’t be flagged as a difference.
Yes, Character or Word mode works well for comparing short code snippets, though for full source files a dedicated code diff tool may give more context.
Yes, this tool is completely free with no signup required.
