L10ndiff
TextDiff for translators
Drop a file here
Drop a file here
Results
Rows are aligned line by line so you can see what changed. If auto-alignment drifts, press ↓ on a correct row to realign everything below.
Text compare tool for translators
L10ndiff is a free text compare (diff) tool for translation and localization. Paste or import original and revised text to review line, character, and word differences — all in your browser.
- Review differences with smart, character, or word highlighting in side-by-side or stacked view, then filter what matters
- Import documents or ZIP files and copy spreadsheet-ready formatting
- Compare entirely in your browser without sending input to a server
Keyboard shortcuts
FAQ
What kind of text compare tool is L10ndiff?
L10ndiff is an online diff built for translation and game localization workflows. You can also use it for everyday document comparison.
Is my comparison text uploaded to a server?
No. Comparison runs only in your browser. Input text used for diffs is not sent to or stored on L10ndiff servers.
How is L10ndiff different from a generic text comparison tool?
You can ignore whitespace, punctuation, speaker/ID, and tags common in translation QA, plus use smart highlighting, side-by-side or stacked views, filter changed rows, and copy with spreadsheet-ready formatting.
Which files can I import?
Plain text plus docx, xlsx, pptx, odt, ods, zip, and similar formats — text is extracted in the browser.