Converts LibreOffice/OpenOffice ODT files to PDF and supports converting several files at once with a single ZIP download.
Introduction
ODT is the native file format of LibreOffice Writer and OpenOffice Writer — free, open-source word processors used in many schools alongside or instead of Microsoft Word. An ODT file and a PDF represent a finished document very differently: ODT keeps everything editable, with styles, fonts, and layout stored in a way a word processor can reopen and change. A PDF instead fixes the exact position of every line and character so the document looks identical everywhere it's opened, on any device, with no editing software required. Converting ODT to PDF trades editability for that fixed, share-anywhere reliability — which is exactly what's needed once a document is finished and ready to hand in, print, or send.
How the conversion works
This tool renders your ODT document the way a desktop word processor would print it, then exports that render as a PDF. For a typical document — headings, paragraphs, standard fonts, images, simple tables — the output matches what you'd see printing the file directly from a desktop word processor. It accepts .odt files up to 20 MB. If your document is already in Word format, use Word To PDF instead — this converter is built specifically for ODT.
You can convert more than one ODT file in the same session: drop in several files and each converts independently, with its own progress and download link. Once two or more have finished, a "Download all" option appears to collect the results into a single ZIP file, so there's no need to download each one separately.
A note on ODT and fidelity
ODT is defined by the OpenDocument Format standard, maintained by OASIS — a different, independently specified format from Word's own .docx. That matters for conversion fidelity: an ODT file created natively in LibreOffice or OpenOffice tends to convert the most predictably, since it was built directly to the format's own rules rather than exported from a different program's interpretation of them. An ODT that was itself exported or "saved as" from Word can occasionally carry over small formatting quirks from that round trip — a font substitution or a spacing shift that wouldn't happen with a natively-created ODT file. Either way, a quick check of the output is worth doing, the same as with any automated conversion.
What to check before you submit the result
No automated conversion is perfect for every document, and it's worth knowing where this one is more likely to shift something:
- Uncommon fonts: if your document uses a font that isn't widely available on the server doing the conversion, a similar font gets substituted — spacing and line breaks can shift slightly as a result. Common fonts (Arial, Calibri, Liberation Sans, Times New Roman) convert most predictably.
- Selecting a large file doesn't guarantee it will convert. The upload screen allows selecting files up to 100 MB, but the conversion itself only accepts ODT files up to 20 MB — a file larger than that will start uploading and then come back with an error rather than being blocked upfront. If you have a large file with embedded images, consider compressing the images in LibreOffice/OpenOffice before converting.
- Password-protected documents are likely to fail to convert, since the tool has no way to enter a password on your behalf — remove protection first if the file needs it.
- Heavily nested tables, embedded objects, or tracked changes left unresolved may render with minor layout differences. Accepting or rejecting tracked changes before converting gives a cleaner result.
None of this means the tool is unreliable for normal classroom use — most assignments, worksheets, and reports convert cleanly — but it's worth a glance at the output before submitting or distributing something important.
If accessibility matters — for example, a document that needs to stay usable with a screen reader — test the converted PDF directly rather than assuming it. Automatic conversion does not guarantee the same accessibility tagging as a manual accessible export.
When this is the right tool
- Students submitting work created in LibreOffice or OpenOffice: converting before submission means the assignment looks the same on the teacher's device as it did on yours, regardless of whether they have the same software installed.
- Teachers distributing materials made outside Microsoft Word: worksheets or handouts built in LibreOffice open identically for every student once converted to PDF, with no dependency on which office suite they have.
- Anywhere Word isn't installed but a document still needs to leave the classroom: schools and shared computer labs often run LibreOffice specifically because it's free — converting the finished document to PDF removes any question of what the recipient has installed.
If the document is still being actively edited or reviewed by multiple people, keep working in the ODT file — converting to PDF is a last step, not a working format.
Example
A student writes a history essay in LibreOffice Writer on a shared school computer, since that's what's installed in the library. At home they only have a phone, and they're not sure the teacher's grading device can open ODT files at all. Converting to PDF before submitting removes that uncertainty entirely — the essay's formatting, headings, and any inserted images stay exactly where they were placed, and the file opens the same way on any device the teacher happens to use.
FAQs
Which format does this tool accept?
ODT files only, up to 20 MB. For Word documents, use Word To PDF instead.
Can I convert several ODT files at once?
Yes. Each file converts independently, and once two or more finish, a "Download all" button bundles them into a single ZIP file.
Will the formatting look exactly the same?
For documents using common fonts and standard formatting, generally yes. Uncommon fonts, an ODT that was itself converted from Word, or heavily customized layouts may shift slightly — see "A note on ODT and fidelity" above.
Do I need LibreOffice or OpenOffice installed?
No — the conversion runs through this page; no software installation or account is required.
Is my file kept afterward?
No. Files are processed only to complete the conversion and are automatically deleted within 2 hours — see the Privacy Policy for details.
What happens to a password-protected document?
The conversion will likely fail, since the tool can't supply a password on your behalf. Remove the password in LibreOffice or OpenOffice before uploading.
