Diff Checker
Compare two pieces of text and see additions, removals, and changes line by line.
Runs entirely in your browser — files never uploaded
+47 / -44 chars
Diff
The quick brown fox jumps over the lazy dog.The quick red fox jumps over the very lazy dog.
How to use Diff Checker
- 1. Paste both texts. Original on the left, modified on the right. Updates as you type.
- 2. Pick line or word diff. Line diff for code/configs, word diff for prose changes.
FAQ
Is anything sent to a server?
No. The diff runs entirely in your browser using the diff library.
How big can the texts be?
Up to a few hundred KB works fine. Multi-megabyte diffs may slow your tab — for huge files, use a desktop diff tool.
Why is my diff not showing what I expected?
The diff algorithm finds the minimum set of changes. Sometimes it 'rebrackets' edits in unexpected ways. Switch between line and word mode for different perspectives.
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