Folio is a PDF reader, editor and scanner for Android. You can read and annotate a PDF, fill in and sign a form, merge or split files, compress a large PDF, scan paper with the camera, and convert between PDF and Word, Excel, PowerPoint or images.
Your PDFs are processed on your phone. Folio has no account and no sign-in, and it does not upload your documents.
What it does
Read PDFs comfortably
Read with day, night or sepia themes, vertical scroll, page flip or a two-page view. Search the whole document, add bookmarks, jump to a page, auto-scroll, and have the text read aloud.
Merge and split PDFs
Combine several PDFs into one in the order you choose, or pull out a page range into a new file. You can also delete, rearrange and rotate pages.
Compress PDF, one or many
Make a PDF smaller to email or upload, choosing a light, balanced or strong setting. Batch Compress handles many PDFs in one run.
Sign PDFs and fill forms
Draw your signature and place it on the page. Fill in text fields, check boxes and drop-downs in PDF forms, or build a fillable form of your own.
Edit text and annotate
Cover existing text and retype it in a matching style, add text anywhere, and mark up pages with highlights, underline, strikethrough, pen, shapes and notes.
Scan paper to PDF
Scan receipts, contracts and IDs with your camera, with edge detection and color, grayscale or black-and-white filters. Turn photos and images into a PDF too.
Convert to and from Office files
Turn Word, Excel and PowerPoint files into PDF, turn PDF text into an editable Word document, and save PDF pages as JPG images.
OCR, redact and protect
Pull text out of scanned pages or make a scan searchable with OCR. Black out sensitive content, add a watermark or page numbers, and set or remove a PDF password.
Where your data lives
Folio processes your PDFs on your phone, and your documents are not uploaded or sent to us. There is no account. Folio uses Google services for crash reports, usage statistics and the in-app tools described in the privacy policy; none of that includes the contents of your documents. Some on-device models (Gemini Nano, and the English model used by Smart Extract) are downloaded from Google over the internet, and nothing from your documents is sent as part of that download. The full list is in the privacy policy.
Questions
Does Folio upload my PDFs?
No. Every tool, including OCR, scanning, conversion and the AI tools, runs on your phone, and the code contains no upload path for documents. One exception you start yourself: in Smart Extract, tapping a tracking number, flight number or ISBN opens a web search for that value in your browser.
Can Folio summarize a PDF on my phone?
Yes. AI Summary gives a bullet-point summary and AI Abstract gives a one-sentence version. They run on your phone and your document never leaves it. Phones with Gemini Nano use it; on other phones Folio pulls out the key points from the document instead.
What PDF tools does Folio have?
Reader, annotations, Edit Text, Add Text, Add Signature, Fill Forms, Fillable PDF, Create PDF, Merge, Split, Delete Pages, Rearrange Pages, Rotate Pages, Compress, Batch Compress, Scanner, Image to PDF, PDF to Image, PDF to Text, OCR, Smart Extract, Redaction, Smart Erase, Watermark, Page Numbers, Bates Numbering, Password tools, Word/Excel/PowerPoint to PDF, PDF to Word, Overlay Compare, Side by Side.
Does compressing a PDF reduce quality?
It can. Compress re-saves the images inside a PDF at a lower JPEG quality; text stays sharp. Light keeps the most image detail, Strong gives the smallest file. How much a file shrinks depends on its images. If a file cannot be processed that way, pages may be saved as images.
Will Word to PDF keep pictures?
Not always. Word to PDF converts text and tables from .docx files, and the result tells you when pictures in the document were not converted. PDF to Word converts the text of a PDF into an editable .docx; it does not rebuild the page layout.
Is redaction permanent?
Yes. The black marks you apply are burned into the saved PDF, and the covered content cannot be recovered from that copy. Keep the original file if you may need it. Folio does not claim to meet any legal or regulatory standard, so check the result before you share it.
Does Folio work on tablets?
Yes. Folio has layouts for larger screens and rotates freely on tablets. On phones it stays in portrait.
Why does Folio ask for All files access?
So it can find, open and save PDFs anywhere on your phone, not only in one folder. Folio uses it only to read and write documents you choose, and does not read files in the background. You can also open a PDF from another app or your file manager.
Requirements
- Android 8.0 or later
- Phones and tablets
More from LogicGateGames
FotolokA photo vault that opens from behind a working calculator.
QuiNotesNotes and checklists, with search that reads the text inside your images.
ThecaA file manager, a cleaner and an encrypted vault in one app.
DiurnaA planner and journal you can restyle to suit how you think.
PermittoPractice for the US learner's permit test, for all 50 states and DC, in English and Spanish.
WAKEMAn alarm that stays on until you finish the task you set it.
Privacy policy · Terms. Questions, bugs and feature requests go to logicgategames@gmail.com — it is read by the person who wrote the app.