Free. Offline. Open source.
All your files.
One quiet app.
Open PDFs, documents, sheets and slides.
No accounts. No ads. Nothing in your way.
Drag an icon. Pull further to let it spring back.
At home on your PC.
PDF on Android · Your library on Windows
What it opens
One app. All the usual files.
Documents, sheets and slides, in their original layout.
More than the big four.
- DocumentsWord, PDF, OpenDocument and RTF
See formats
Read reports, letters and notes.
PDF · DOCX · DOC · ODT · RTF - SpreadsheetsExcel, OpenDocument and CSV
See formats
Browse tables and switch between sheets.
XLSX · XLS · ODS · CSV - PresentationsPowerPoint and OpenDocument
See formats
Read slide decks and speaker notes.
PPTX · PPT · ODP - Text & codeMarkdown, plain text, JSON and source code
See formats
Read notes, logs, formatted Markdown with maths, and code with its syntax coloured.
MD · TXT · JSON · XML · code - Books & picturesEPUB, comics, photos and scans
See formats
Read books and comics, and look at photos with their camera details.
EPUB · CBZ · JPG · PNG · HEIC · AVIF · TIFF · SVG
Tools
Sign it. Merge it. No website needed.
The PDF jobs people upload to a website for, done on your device. Each one saves a new file where you choose; the one you started with stays as it was.
- Fill & signType into a PDF form, then sign it: draw, type or use a photo of your signature.
- Merge PDFsPut several PDFs together, in the order you choose.
- Organize pagesTurn, move or take out pages.
- Split or extractSome pages as a new PDF, or every page as its own.
- Pictures to PDFPhotos and scans as the pages of one PDF.
- PDF to picturesEach page as a JPEG or PNG, at screen or print quality.
- Page numbers & watermarkNumber the pages from any start, or mark them DRAFT, once or all over.
- PasswordsLock a copy with a password, and choose if it can be printed or copied.
A signature you keep for next time stays on your device, like everything else. Files can also be renamed from inside the app.
Three calm themes
Find your reading light.
Change the mood.
Soft paper. Made for daylight.
Warm sand. For long evenings.
Soft charcoal. For late nights.
Or choose Auto: Paper by day, Ink at night.
Also on your PC
The same calm, on Windows.
A 22.3 MB installer with the same viewers, themes and recents, two documents side by side when you need them, in a window that stays out of the way.
Compared
A little less baggage.
Compare the essentials. Choose what fits.
| Feature | Paperwren | WPS Office | Microsoft 365 Copilot | Adobe Acrobat Reader | MobiOffice | Google Drive |
|---|---|---|---|---|---|---|
| Ads | None | Listed | Listed | Listed | Listed | None listed |
| Paid extras | None | Yes | Yes | Yes | Yes | Yes |
| Account | Not needed | For extra features | Microsoft account | For extra features | For extra features | Required |
| Data sharing | None | None declared | Declared | Declared | Declared | None declared |
| Data collected | None | None declared | Declared | Declared | Declared | Declared |
| Internet access | No access | Uses internet | Uses internet | Uses internet | Uses internet | Uses internet |
| Edits documents | Fills and signs PDFs | Yes | Yes | Yes | Yes | Separate apps |
Google Play disclosures · 27 September 2026. Listings may change. Sources & full details ↗
Questions
Fair questions.
Is Paperwren really free?
Yes. There is no paid tier, no subscription and no in-app purchase. The app is open source under the MIT licence.
Does it need an internet connection?
No. Everything works offline. The Android app does not even request the internet permission, so it works the same on a plane as it does at home. On Windows and macOS, Paperwren can check GitHub for a new version when it starts, but only if you allow it.
Which files can it open?
PDF (including password-protected files), Word .docx, Excel .xlsx, .xlsm, .xlsb and .xls, PowerPoint .pptx, OpenDocument .odt, .ods and .odp, legacy .doc and .ppt, RTF, EPUB books, CBZ comics, CSV, TSV, Markdown, plain text, logs, JSON, XML and source code, and pictures (JPEG, PNG, GIF, WebP, SVG, AVIF, HEIC and TIFF).
Can I edit documents with it?
It does not edit Word, Excel or PowerPoint files: for that, a full office suite is the right tool. It can fill in and sign PDF forms, add text or a date, put PDFs together, split them, turn and reorder pages, number them and add or remove a password. Each tool saves a new copy; the file you opened stays as it was.
Is my signature stored anywhere?
Only on your device, and only if you ask Paperwren to keep it for next time. It is never uploaded: Paperwren sends nothing about you or your files anywhere. You can forget a kept signature whenever you sign.
Where are my files stored?
Files you open stay where they are. So a recent file can be reopened after you close the app, Paperwren keeps a private copy that only it can read, capped at 250 MB in total. You can clear those copies in Settings at any time.
Why is the Android app an APK instead of a Play Store listing?
Paperwren is currently published on GitHub Releases, built automatically from the public source code. Your phone will ask once whether your browser may install apps. Paperwren itself still asks for nothing.
Does it work on Huawei phones?
Yes. Phones without Google Play, Huawei's among them, often have an older web engine, and from version 1.6 Paperwren works with it. If a file still won't show, update Huawei WebView in AppGallery, or Android System WebView on other phones.
Is there an iPhone version?
Not yet. Paperwren is available for Android, Windows and macOS.
Get Paperwren.
Free on Android and Windows. Install it, open a file, done.
Download from GitHub Releases. Open source, always.