Text Tools
Text Diff Checker
Compare two texts and instantly see what changed. Side-by-side, line-by-line. Runs entirely in your browser.
Frequently asked questions
How does the diff work?
We use a longest common subsequence (LCS) algorithm to find the optimal match between your two texts, then highlight insertions in green and deletions in red.
Is my text uploaded anywhere?
No. Everything runs in your browser. Your text never leaves your device.
Can I compare code?
Absolutely. The tool treats every line independently so it works great for code, prose, JSON, CSV, anything line-based.