Text Diff Checker & Compare
Compare two versions of any text side-by-side. See exactly what was added, removed, or changed — line by line, word by word, or character by character.
Original Text
0 lines • 0 words • 0 charsNew / Modified Text
0 lines • 0 words • 0 chars⚙️ Comparison Settings
How to Compare Two Texts Online
Using our text diff checker takes only a few seconds. Follow these simple steps:
- Paste your original text in the left box — or upload a TXT file directly.
- Paste the modified version in the right box. Both sides update counters live.
- Choose your diff mode — Line, Word, or Character — and pick Side-by-Side or Unified view.
- Toggle smart filters like Ignore Case, Ignore Whitespace, or Ignore Punctuation if needed.
- Review the highlighted result — added lines turn green, removed lines turn red, changed lines turn amber.
The comparison runs automatically as you type. No button click is required — though you can always hit “Compare Text” for an instant refresh.
Why Use Our Diff Checker?
Whether you’re comparing two versions of an article, checking code changes, or validating CSV exports, our text diff checker gives you the clearest view of what actually changed.
Unlike basic compare text online tools that just show you raw differences, this diff checker highlights added, removed, and modified content with colour-coded rows. You get eight useful statistics — total lines, added, removed, changed, unchanged, words added, words removed, and similarity percentage — all updated in real time.
Everything runs inside your browser. Your text never leaves your device, which makes it safe for sensitive content like contracts, code, or private notes.
Powerful Features of Our Text Compare Tool
Built for anyone who needs to compare two texts quickly and accurately.
🔍 Three Diff Modes
Compare by line, by word, or by character. Line diff is great for documents, word diff for essays, and character diff for code or precise edits.
📺 Two View Modes
Switch between Side-by-Side for a traditional diff layout, or Unified / Inline for a compact view that shows changes line by line.
⚙️ Six Smart Filters
Ignore case, whitespace, blank lines, line breaks, punctuation, and trim lines. These options let you focus only on the differences that matter.
📊 Eight Live Statistics
See total lines, added, removed, changed, unchanged, words added, words removed, and similarity percentage — updated instantly after every comparison.
💾 Export & Copy
Copy the full diff result to your clipboard or download it as a .txt file. The report includes both the statistics summary and the line-by-line comparison.
🔒 100% Browser-Based
No API key, no signup, no upload. Your text is processed entirely in your browser, so private content never touches any server.
Who Can Use This Text Comparison Tool?
This diff checker is built for anyone who works with text regularly:
- Writers & editors — track revisions between two drafts of an article.
- Developers — compare code snippets, config files, or log outputs.
- Students & researchers — verify changes between two versions of an essay.
- Data analysts — spot differences between CSV exports or JSON dumps.
- Legal & business teams — review edits in contracts and agreements.
Frequently Asked Questions
What is a text diff checker?
A text diff checker is a tool that compares two blocks of text and highlights exactly what was added, removed, or changed. It’s commonly used for document revisions, code reviews, and data validation.
Is this diff checker free to use?
Yes — completely free. No signup, no hidden limits, no premium tier. Paste your text and compare as many times as you want.
What’s the difference between line, word, and character diff?
Line diff compares entire lines — best for documents. Word diff compares individual words — great for essays. Character diff compares every character — ideal for code and precise edits.
Can I compare text without uploading files?
Yes. You can paste text directly into both boxes, or upload .txt files. Everything runs in your browser — nothing is uploaded to any server.
How does the similarity percentage work?
The similarity score is calculated from the ratio of unchanged lines to the total number of lines. If 8 out of 10 lines are unchanged, similarity is 80%.
Does it work on mobile devices?
Yes. The text compare tool is fully responsive and works smoothly on Android, iOS, tablets, and desktop browsers.
What is the difference between side-by-side and unified view?
Side-by-Side shows the original on the left and the modified text on the right. Unified view shows both in a single column with + and − prefixes, similar to GitHub diffs.
Can I download the comparison result?
Yes. After comparing, click “Download .txt” to save a full report containing statistics and the complete line-by-line diff. You can also copy the result to your clipboard.
Start Comparing Your Texts Now
Scroll back up, paste both versions of your text, and see every difference highlighted in seconds. Whether you need to compare text online once or every day, this diff checker is ready — free, fast, and fully private.
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