On-device page rendering, page navigation, pinch-to-zoom, sharing, and printing. Search, bookmarks, and text selection are not part of v1.
Folio PDF.
A free, ad-free Android opener for PDF, DOCX, RTF, XLSX, CSV, PPTX slide outlines, Markdown, and plain text - one app, no account.
Free public utility. No subscription, no in-app purchase, no ads.
v1.1.1 · 9.8 MB
- Open from anywhere. Tap a document in your file manager, email, or chat and choose Folio — or open Folio and pick the file yourself. It registers for every format it reads.
- Read.Move through PDF pages, pinch to zoom, or open the app’s focused reading views for documents, sheets, and slides.
- Edit the editable. Markdown and plain text open in a live editor and save back to the same file. Everything else is faithful read-only.
- Share only when you choose. Nothing leaves the phone unless you tap share yourself.
Word documents
.docx and .rtf in a read-only editorial view. Text, headings, and tables are supported; embedded DOCX images appear as placeholders in v1.
Spreadsheets
.xlsx and .csv in a read-only table view, including the values stored in workbook cells. Legacy .xls and OpenDocument .ods files are not supported in v1.
Slides
.pptx as a clear read-only outline of slide titles and body text. Pixel-faithful layouts, speaker notes, legacy .ppt, and .odp are outside the v1 scope.
Markdown
Built-in source editor with a native preview. Edit and save back to the same file without a WebView.
Plain text
UTF-8 safe, large-file friendly. Open log files and config files without thinking about encoding.
Reading a document should not require a subscription.
Most Android document apps either charge a monthly fee, fill the screen with ads, or both. Folio PDF is the opposite of that — a fast, ad-free reader for the formats you already have. It costs nothing because reading documents should not cost anything.
The app is part of the ClassEve product family but it does not require a ClassEve account. Open it, point it at a file, and read.
Android 10 or later
Works on Samsung, Pixel, OnePlus, Xiaomi, and every major manufacturer.
Storage access
Files open through the system picker - the app reads only what you point at, not the rest of your storage.
Offline by construction
Rendering happens entirely on-device — and the app doesn’t even request internet permission, so it physically cannot send your files anywhere.
Frequently asked questions
What is Folio PDF?
Folio PDF is a free, ad-free document reader for Android. It opens PDF, DOCX, RTF, XLSX, CSV, PPTX slide outlines, Markdown, and plain text in one app, with no account or subscription.
What file formats does Folio PDF open?
PDF; Word (.docx and .rtf); spreadsheets (.xlsx and .csv); slide outlines (.pptx); Markdown; plain text; JSON; and XML. Legacy .doc, .xls, and .ppt plus OpenDocument formats are not supported in v1.
Is Folio PDF really free, with no ads?
Yes. No subscription, no in-app purchase, and no ads. It is a free public utility from ClassEve.
Does Folio PDF require an account?
No. There is no sign-up. Open the app, pick a file, and read.
Is it private and offline?
Yes. Rendering happens entirely on-device. No file leaves your phone unless you share it yourself.
What Android version is required?
Android 10 or later, on any major manufacturer — Samsung, Pixel, OnePlus, Xiaomi, and others. Download the APK directly from the Folio PDF page — it installs like any Android app.