Compare ODT Documents
Compare two ODT documents online without LibreOffice. The text of both files is extracted and diffed in your browser. Free, with no upload.
Files never leave your browser.
About ODT Diff
Compares the text of two OpenDocument Text files. Each .odt file is read in your browser and its text is compared at character, word, or line level. The document never leaves the browser.
How to use
- Drop or pick the left .odt file.
- Drop or pick the right .odt file.
- Set Granularity to Character, Word, or Line, and turn on Ignore whitespace or Ignore case under Options.
What this tool doesn't handle
- Only the text is compared. Layout, images, fonts, and styling are not.
- Embedded macros and forms are ignored.
Frequently asked questions
Do my files ever leave my browser?
No. Every comparison runs locally in your browser. Nothing you paste, drop, or load is uploaded to a server; the tool keeps working even if you go offline after the page loads.
Is this tool free to use?
Yes. All DiffResolver tools are free, with no account, sign-up, or installation. Because processing happens on your device, there are no server-imposed usage limits.
Do I need LibreOffice installed to compare ODT files?
No. The .odt files are read in your browser and their text is compared there, with no office suite and no upload.
Is the comparison based on text or layout?
Text. The text of both documents is extracted and compared at character, word, or line level. Layout, images, and styling are not compared.
Is there a file size limit?
No server limit applies, because nothing is uploaded. The memory of your device sets the practical limit. Above 10 MB for text, 40 MB for images, 100 MB for documents, or 500 MB for archives, the tool warns you that the work can be slow, but it never blocks the file.
Does this tool work offline?
Yes. The browser keeps a copy of the tool after the first visit, so a page you opened before still works without a network. You can also install DiffResolver as an app from the browser menu. Installation stays optional; the site works the same in a normal tab.
Where is my data stored?
Your files are stored nowhere. They stay in the memory of the page and are gone when you close the tab. Only what you save yourself stays in this browser: a snapshot, your tool options, and your theme. To remove it, open Settings and select Clear all local data.