Compare Text
Online
Paste your text below to instantly find differences. A free tool for line-by-line text comparison.
Next-generation algorithms for character-by-character comparison.
Compare Text Online (Diff Tool)
Paste your text blocks below to instantly compute the diff.
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How to Diff Two Text Fragments
We combined powerful analysis algorithms with an intuitive interface for your productivity.
Paste Content
Copy and paste the old text on the left and the new text on the right.
Text Parsing & Diffing
The analyzer tokenizes the raw text into words and sentences for accurate checking.
Side-by-Side Results
Removed words are highlighted in red while newly added text appears in green.
Text Comparison Features
We combined powerful analysis algorithms with an intuitive interface for your productivity.
Lightning Fast
Processing a hundred pages of text takes mere fractions of a second.
Case Insensitive Option
You can optionally ignore uppercase/lowercase discrepancies via our settings.
Easy Copy/Paste
You don't need real files. Comparing small paragraphs from the clipboard is perfectly fine.
Frequently Asked Questions about text comparison
How does the text comparison algorithm work?
The online text difference tool (Diff checker) scans the two content fields string by string. It spots common patterns and isolates the deviations. Deleted fragments show up in red, and new inserted sentences show up in green. It's ideal for rewriters and editors.
Are there limits on text size?
You can compare massive blocks of text—easily reaching hundreds of thousands of characters (like entire chapters of an article)—without slowing down your browser and completely for free.
Do I need to download any software?
No. Our Diff Checker operates exclusively in the cloud within your web browser. This means it's Cross-Platform: it works identically on MacOS, Windows, and Linux without downloading or installing dedicated packages.