Text Diff Checker
Compare text quickly with our text diff checker and diff checker. Use this text compare tool to compare text online, identify changes, and find differences between two versions of content. Our text difference checker, compare two texts, and online text comparison features make it easy to review documents, code, articles, and revisions. Use the text comparison tool, difference checker, or text diff tool to compare text files and identify additions or changes. Wondering how do I compare two texts, how can I find differences between two texts, or how do I compare two text files online? Paste both versions and compare them instantly.
How to use the Text Diff Checker
- Paste the original into the first box and the changed text into the second.
- Read lines marked - (removed) and + (added).
Text Diff Checker features and limits
- Line-based comparison using longest common subsequence
- Limitation: inputs above roughly 2,000 lines each are rejected.
How the Text Diff Checker works
The page finds the longest common run of lines and labels everything else as removed or added.
Privacy and browser processing
Your input is processed locally in this page and is not uploaded or stored by Best Web Tools. Your hosting provider may still keep ordinary server logs for page requests.
Frequently asked questions
Does it highlight changes inside a line?
No. A changed line shows as one removal and one addition.
Related tools
Browse all Text Tools or return to the Best Web Tools homepage.
Why use the Text Diff Checker?
Comparing drafts, configs or contract versions by eye is error-prone. A line diff shows what changed at a glance.