Diff Checker - Compare Text Side by Side
Compare two blocks of text with a line-by-line side-by-side diff
Comment ça marche
- 1Paste both versions
Drop the original into the left column and the changed version into the right.
- 2Read the diff
Additions highlight green on the right, removals highlight red on the left, line numbers on both sides.
- 3Toggle whitespace
Enable 'Ignore whitespace' to hide trailing-space or indentation-only diffs.
À propos de Diff Checker - Compare Text Side by Side
Free online diff checker. Paste two blocks of text to see a side-by-side line diff - additions in green, removals in red, with line numbers. Optional ignore-whitespace mode. Runs entirely in your browser. Diff Checker - Compare Text Side by Side sur 712 Tools tourne entièrement dans ton browser via des APIs JavaScript natives - aucun server ne voit jamais tes données. Résultats instantanés, privacy complète, et aucune limite d'upload.
Que ce soit pour une session de debug, un sanity check rapide ou un incident en prod, cet outil est gratuit à utiliser autant que tu veux. Pas de watermarks, pas de signup et pas d'ads dans l'outil.
Questions fréquentes
What algorithm is used?
A longest-common-subsequence (LCS) diff, the same approach used by git diff. Runs entirely in the browser.
Is there a size limit?
The LCS algorithm is O(n·m) in memory. Very large diffs (10,000+ lines) may slow the browser.
Are my texts uploaded?
Never. Both blocks stay in your browser - nothing is sent to any server.
Outils similaires
Word Counter
Count words, characters, sentences, paragraphs, reading time
Case Converter
Convert text to UPPERCASE, lowercase, camelCase, snake_case, kebab-case, and more
Text Diff
Compare two texts and highlight the differences
Find & Replace
Bulk find and replace text with regex support
Slugify
Turn any text into a clean URL slug - Unicode-aware
String Escape
Escape or unescape strings for JSON, JavaScript, and XML