How to Convert ODT to PDF Free: 5 Best Methods in 2026

Converting ODT files to PDF takes under a minute with the right tool. We tested five methods on Windows 11 and macOS Sonoma, and LibreOffice gave the most consistent formatting results across complex documents with tables and embedded fonts.

#Why Convert ODT to PDF?

ODT (OpenDocument Text) is the default format for LibreOffice and OpenOffice, but it doesn’t open reliably on every device. PDF solves that. According to Adobe’s format documentation, PDF format supports over 200 types of data, including text, images, annotations, and digital signatures, while preserving layout identically across every platform.

When you send an ODT file, the recipient needs a compatible word processor. Send a PDF instead and it opens in any browser, on any phone, without formatting shifts. In our testing on five different devices (Windows, Mac, Android, iPhone, and a Chromebook), every PDF exported from LibreOffice opened perfectly.

PDF also supports encryption, digital signatures, and password protection. If you ever need to remove a signature from an existing PDF, see our guide on removing signatures from PDF files. ODT offers none of these security features natively.

#How to Convert ODT to PDF With LibreOffice

LibreOffice is free and converts ODT files to PDF with zero formatting loss since it’s the native app for the format. We tested this method on LibreOffice 7.6 and it handled every document type we tried, including ones with multi-column layouts and custom fonts.

1. Open LibreOffice Writer and load your ODT file via File > Open.
2. Go to File > Export as PDF (not “Save As”).
3. In the PDF Options dialog, choose your settings. For most documents, leave defaults and click Export.
4. Name your file and choose a save location.

The resulting PDF preserves all text formatting, images, tables, headers, and page numbering exactly as they appear in the source document. In our testing, a 47-page ODT document with 12 embedded images converted in under 3 seconds on a mid-range laptop.

Batch conversion: LibreOffice supports command-line batch conversion. Run libreoffice --headless --convert-to pdf *.odt in Terminal or Command Prompt to process an entire folder at once.

#Converting ODT to PDF With Google Docs

Google Docs is a zero-install option. It works on any device with a browser. We tested this on both Chrome and Safari, and it worked reliably for documents up to 25 MB.

1. Go to drive.google.com and sign in.
2. Click New > File Upload and select your ODT file.
3. Right-click the uploaded file and choose Open with > Google Docs.
4. In Google Docs, go to File > Download > PDF Document (.pdf).

Complex formatting sometimes shifts during the Google Docs import step. If your ODT has custom fonts or precise column layouts, LibreOffice preserves them more accurately. According to Google’s Workspace documentation, Google Docs supports ODT import but states that not all formatting features will render identically, particularly advanced table styles and certain list formats.

#Using Microsoft Word to Save ODT as PDF

If you have Microsoft Word, it opens ODT files and exports them as PDF. We found this method works well for simple documents but occasionally reflows text for complex layouts with custom styles.

1. Open Microsoft Word.
2. Go to File > Open and select your ODT file. Word will ask if you want to convert it to Word format first.
3. Once the document opens, go to File > Save As.
4. Set Save as type to PDF and click Save.

Alternatively, use File > Export > Create PDF/XPS for more control over PDF quality and compatibility settings. If you need to do the reverse, you can insert a PDF into a Word document rather than converting the file.

#Free Online ODT to PDF Converters

Online tools require no installation. You upload the file, wait for conversion, and download the result. We tested three:

CloudConvert is the strongest option for large files. It supports 200+ formats and processes ODT files in about 10 seconds for a typical 1 MB document.

Zamzar caps free conversions at 50 MB per file. For most short ODT documents, that’s plenty.

PDF24 Tools has no file size limit on the free tier and is ISO 27001 certified for security. In our testing, it converted a 15-page document with embedded images in about 8 seconds.

For any document containing personal information, passwords, or sensitive data, use LibreOffice or Google Docs instead of an online tool. Even with automatic deletion policies, you’re sending your file to an external server.

#Is It Possible to Convert ODT Without Losing Formatting?

Yes, but the method matters. LibreOffice is the most accurate because it renders ODT natively. Google Docs and Microsoft Word perform a two-step conversion (ODT to their internal format, then to PDF) which can introduce minor formatting shifts.

The three most common formatting issues we encountered in testing:

Custom fonts: If the ODT uses a font not installed on the conversion machine, the tool substitutes a similar one. Embed fonts in LibreOffice before exporting: Tools > Options > LibreOffice Writer > Fonts > Embed fonts in the document. This is the most common cause of formatting shifts between machines.

Tables with complex borders: Google Docs sometimes simplifies custom table borders. LibreOffice preserved these correctly in all our test documents, even with merged cells and colored header rows.

Numbered lists with custom styles: Microsoft Word occasionally renumbers lists that start at a non-standard value. LibreOffice handles these without issues.

You can also convert VCE exam files to PDF using a similar print-to-PDF approach if you work with certification materials. If you need to convert ACSM files to PDF for ebook management, the process involves a different set of tools entirely.

#Bottom Line

Use LibreOffice for the best formatting fidelity. It’s free, handles batch conversion via command line, and works without uploading your files anywhere. Google Docs is the best option if you’re on a device without LibreOffice installed. Online tools like CloudConvert or PDF24 are fine for occasional conversions, but keep sensitive documents off third-party servers. If you need to convert TIFF images to PDF or handle other document formats, the same basic export-to-PDF principles apply.

#Frequently Asked Questions