Private by design — nothing leaves your device
Open any office document, anywhere.
Android's first OpenOffice and LibreOffice reader, shipping since 2010. Opens ODT, ODS, ODP, DOCX, XLSX, PPTX and PDF on your phone, in complete privacy: offline, without an account, and without uploading anything.
Free, ad-supported, and open source. An ad-free paid edition is on both stores.
See for yourself
This page runs the same C++ engine as the apps, compiled to WebAssembly. Drop a document below and it is decoded and laid out inside your browser — nothing is uploaded, and the page works with your network switched off.
Drop a document here
ODT, ODS, ODP, DOCX, XLSX, PPTX, PDF and more — it stays on your device
Powered by @opendocument/odr-core — the renderer is fetched only when you open something.
A reader, not a compromise
Complex formatting, embedded images, tables and charts survive the trip to a small screen — and the parts you actually need on the move are one tap away.
Search and highlight
Find a keyword anywhere in the document and see every hit marked in place.
Fix a typo on the go
Basic editing for the last correction before you send it — no round trip to a desktop.
Password-protected files
Encrypted documents open the same way, with the password never leaving the device.
Works offline
Everything is decoded on your device, so a tunnel or a plane changes nothing.
Distraction-free reading
Full-screen mode for reading notes on the bus, with the interface out of the way.
Read out loud
Text-to-speech reads a document back to you, hands free.
Select and copy text
Pull a paragraph out of a document and paste it wherever you need it.
Print
Send a document straight to any printer your device can reach.
Opens from wherever your documents already are
Tap an attachment in Gmail, Drive, iCloud, OneDrive, Nextcloud, Dropbox or Box and it opens here. Or browse your device with the built-in file explorer.
Built for ODF. Fluent in the rest.
The Open Document Format is what LibreOffice and OpenOffice write, and it is what this reader was built around. Everything else it learned because you get sent those too.
ODT
LibreOffice Writer
ODS
LibreOffice Calc
ODG
LibreOffice Draw
Microsoft Office
- DOC
- DOCX
- XLS
- XLSX
- PPT
- PPTX
PDF and plain formats
- RTF
- TXT
- CSV
- HTML
Images
- JPG
- PNG
- GIF
- WEBP
- TIFF
- BMP
- SVG
Media
- MP4
- WEBM
- MP3
- OGG
And the awkward ones
- ZIP
- EPS
- DXF
- PSD
ODF is also the format behind NeoOffice, StarOffice, Collabora, OnlyOffice, IBM Lotus Symphony, WPS Office, AndrOpen Office and a long tail of others — if a suite exports ODT, ODS or ODP, this opens it.
Privacy
Privacy you don't have to take on trust
A document reader sees everything you open with it — contracts, notes, payslips. This one has nowhere to send any of it: there is no server behind the app, and the code that opens your files is public.
Read the sourceNothing is uploaded
Documents are decoded on your device. There is no server to send them to, no account to make, and nothing to delete afterwards.
Open source, all of it
The apps, the rendering engine and its bindings are public. Read the code that opens your files, or build it yourself.
Made in Austria
A small independent project, not a division of anything. Ads in the free edition pay for the work; the paid edition has none.
Use the engine yourself
The part that reads the documents is a C++ library called OpenDocument.core. It is published for the web and for Python, under the MPL-2.0.
@opendocument/odr-core
The engine as WebAssembly. Render documents to HTML in a browser or in Node, with no server — it is what the demo above runs on.
npm i @opendocument/odr-corepyodr
Python bindings to the same C++ library, for batch conversion, indexing pipelines and anything that needs documents as text.
pip install pyodropendocument-app
The C++ engine, the Android and iOS apps, the rendering test corpus and the packaging recipes. Issues and pull requests welcome.
git clone OpenDocument.coreBoth apps compile no native code of their own — Android pulls an odr-core-android AAR from Maven Central and iOS a OdrCoreObjC Swift package, so every platform reads documents through exactly the same code.
The engine is maintained in the open and paid for by the apps. If it saves you work, you can sponsor it on GitHub.
Get OpenDocument Reader
Free on Android and iOS, and on F-Droid for a build with no proprietary dependencies at all.
Prefer it without ads? Pro is the same app, paid once: Google Play·App Store