Usugami

Usugami

薄紙 · oo-soo-GAH-mee · Japanese for “thin paper”: a light app for making light PDFs.

Turn photos, Word documents, PowerPoint slides, Excel spreadsheets and EPUB e-books into PDFs, and split, merge, reorganize, rotate, edit, number, watermark, sign, compress, flatten and redact PDFs.

  • No ads
  • No tracking
  • No account
  • No uploads
  • Free and open source

Two ways to use it

In your browser, or on your Android phone

Usugami in your browser

The same tools on this website, for phones, tablets and computers. Nothing to install, nothing to sign up for.

  • Your files are worked on in the browser, on your device, and never uploaded.
  • Tools you have used once keep working offline.
  • In current Chrome, Edge, Firefox and Safari.
Open the web app

Usugami for Android

The original app, for Android 8.0 or newer: from GitHub, Obtainium or Usugami’s own F-Droid repository.

  • No internet permission, so it can’t upload your files.
  • No permissions to grant, not even for the camera.
  • Share files to Usugami from any app.
Download for Android

Screenshots

A look at the app

Usugami on an Android phone. The web app follows the same design.

  • Usugami home screen with search and its tools in sections
  • Arranging images before making a PDF
  • Options for creating the PDF
  • One of the PDF tools

Swipe to see more.

Features

Everything Usugami does

Grouped as on Usugami’s Home screen, where Search finds a tool as you type, by its name, what it does or a word you might use for it (“combine”, “shrink”, “scan”).

Create PDF

  • Scan document

    Take photos or upload images, then crop and clean them up

    • Take photo opens your camera app; Upload images picks one or more images.
    • Each page goes through two steps: Crop page, then Filters.
    • Usugami finds the page by itself, even a white page on a white desk or one held in a hand. Drag its corners or sides, and the page comes out straight, as if scanned.
    • Seven looks: Original, Lighten, Enhanced, Super enhanced, Grayscale, Black & white and Ink saver, with Brightness, Contrast and Apply to all pages.

  • Images to PDF

    Camera scans and images to PDF, with text recognition

    • JPG, PNG, HEIC, AVIF, WebP, BMP and GIF images. Drag to reorder; rotate, remove, or sort by name.
    • Page size Fit, A4, US Letter, US Legal, A3 or A5; orientation Auto, Portrait or Landscape; no margin, a small one or a big one.
    • One PDF with every image, or one PDF per image.
    • Always compressed: Less (200 dpi), Recommended (150 dpi) or Extreme (100 dpi). Black-and-white pages take about 10 KB.
    • Photos come out the right way up, with their location and other hidden metadata removed.

  • Text recognition (OCR)

    Make the PDF searchable

    • An optional searchable PDF in English, French, Spanish or Hindi. Hindi mode also keeps any English text.
    • Text is read from your original images, not the compressed copies, so small print is found even at Extreme.
    • In the web app, and in Usugami and Usugami OCR; Usugami Lite has no text recognition. The web app downloads what it needs from this website the first time you use each language, and your images never leave your device.

  • Word to PDF

    Documents (.docx), converted on your device

    • Keeps the page size and margins, headings and other styles, formatted text, lists, tables (with their header row repeated), pictures, page breaks, landscape pages, and headers and footers with page numbers.
    • The text stays real text, so you can search and select it in the PDF.
    • Pictures are compressed and only the letters the document uses go into the PDF, so it stays small.

  • PowerPoint to PDF

    Slides (.pptx), one page each

    • One page per slide, in order, the size of the slides. Hidden slides are left out.
    • Keeps backgrounds, text and bullets in the presentation’s own styles, shapes, pictures and tables.
    • Text too long for its box is shrunk to fit, as PowerPoint does.

  • Excel to PDF

    Spreadsheets (.xlsx), sheet by sheet

    • Each visible sheet on pages as Excel prints it: print area, title rows and columns, page breaks, paper size, orientation, margins, scale and Fit to.
    • Numbers, currencies, percentages, dates and times as Excel shows them, with fonts, colors, fills, borders, merged cells, pictures, and headers and footers.
    • Page size and orientation as each sheet was set to print, or one for every sheet, with Fit columns to page width and Gridlines.

  • EPUB to PDF

    E-books (.epub), laid out as pages

    • On A5 pages (about the size of a paperback) or A4 for printing: the cover first, then the chapters in reading order.
    • Keeps headings, paragraphs, bold, italic and underlined text, lists, quotes, simple tables and pictures.
    • The table of contents becomes the PDF’s bookmarks. Books with DRM (copy protection) can’t be converted.

Organize

  • Merge PDF

    Combine files and arrange individual pages

    • Add PDFs and put them in order, or sort them by name.
    • Switch to page mode to reorder, rotate and remove individual pages before merging.

  • Split PDF

    Extract pages or split into smaller files

    • Pick pages by tapping previews or typing numbers like 1,3,5-8.
    • Separate ranges like 1-3;5;7-9, chunks of a fixed size, or one PDF per page.
    • Combine the selection into one PDF, or save each part as its own file.

  • Reorganize PDF

    Move, turn, remove and add pages

    • See the pages in a grid: move a page earlier or later, turn it or remove it, or drag it.
    • Add pages from another PDF, or a blank page. Undo takes back one change at a time.
    • The bookmarks, links and form fields of the pages you keep stay as they were.

  • Delete pages

    Remove the pages you don’t need

    • Tap the pages to delete, or type them like 2,5-7; Usugami shows how many will go.
    • Deleted pages are really gone: their text, pictures, form fields and bookmarks aren’t left hidden in the file.

  • Rotate PDF

    Turn pages the right way up

    • Turn single pages left or right, or all of them at once, and watch them turn.
    • Only the way each page is shown changes: text, images and quality stay exactly as they were.

Edit and sign

  • Edit PDF

    Add text, drawings, shapes and pictures

    • Add text, drawings, highlights, shapes (rectangles, ellipses, lines and arrows) and pictures on top of any page.
    • Drag into place and resize; six colors; Undo and Redo.
    • Text stays real, searchable text, Hindi included, and drawings stay sharp at any zoom.

  • Sign PDF

    Draw your signature and place it

    • Draw your signature in black or blue ink, then drag it into place on the page and choose its size.
    • A sharp picture with a see-through background, exactly where the preview shows it.
    • Kept only while Usugami is open, so you can sign another PDF; it isn’t saved anywhere else.

  • Add page numbers

    Number pages at the top or bottom

    • At the top or bottom, on the left, in the center or on the right; small, medium or large.
    • Skip pages, such as a cover (1) or 1-2,5. Each page keeps its own number.
    • Numbers go where you see the bottom (or top) of the page, even on pages turned sideways.

  • Add watermark

    Stamp text across every page

    • Any text, such as DRAFT or CONFIDENTIAL, large and diagonally across every page.
    • Gray, black, red, blue or green; translucent, semi-opaque or opaque, with a preview.
    • Accents and Hindi included. The watermark is real text, not a picture.

Optimize and protect

  • Compress PDF

    Shrink images, keep text sharp

    • Less, Recommended or Extreme. Text stays selectable and drawings stay sharp; only images are reduced.
    • Never makes a PDF bigger: if compressing can’t save space, you keep the original.
    • Each new PDF says how much smaller it got.

  • Redact PDF

    Black out text and pictures for good

    • Draw a box over anything, or use Find text to box a word or phrase on every page.
    • True removal, not a black box on top: each page with a box is saved as a picture of itself with the boxes painted in.
    • Also removes the document’s title, author and other details, bookmarks, attached files and scripts.

  • Flatten PDF

    Make forms and comments part of the page

    • Filled-in form fields, comments, highlights, drawings and stamps become part of the page, so nothing can be changed any more.
    • Every PDF viewer then shows them the same way, and links keep working.
    • If a PDF has nothing to flatten, Usugami tells you instead of saving a copy.

Everywhere

  • Several files at once

    Compress, number, watermark or flatten many PDFs, or convert many documents, each into a PDF of its own, named as you like. Save them one by one or as one ZIP file.

  • Share to Usugami

    Share images, PDFs, Word, PowerPoint, Excel or EPUB files from another app, and they open in the right tool.

  • Recent files

    The files you save, newest first, on Home: open, share or remove them, up to 50.

  • Password-protected PDFs

    Opened with their password. The new files have no password, and Usugami tells you so.

  • Four languages

    The Android app comes in English, French, Spanish and Hindi; change it any time in Settings. The web app is in English for now.

  • Light and dark

    Follows your device, or pick Light or Dark in Settings, Appearance.

  • Finds a tool as you type. Case and accents don’t matter.

  • Open, share and save

    Open, Share, Save to Downloads or Save as…, and several PDFs as one ZIP file.

  • Usugami watermark

    Off unless you turn it on: a small “Usugami” in the corner of each page, to support the app, with Size and Opacity sliders. The switch is at the top of the result screen.

Privacy

Private by design

Usugami does not collect, share or sell any data about you. The developer receives nothing from it.

  • No uploads

    The Android app has no internet permission, so it can’t upload your files. The web app works on them in your browser and never sends them anywhere.

  • No ads, no tracking, no account

    No ads, no analytics, no tracking, no accounts and no in-app purchases. This website has no cookies either.

  • Only the files you pick

    Usugami asks for no permissions. It gets just the images, PDFs and documents you choose or share with it.

  • Temporary copies are cleaned up

    While you work, copies live in Usugami’s private storage and are deleted automatically.

  • Recent files stays with you

    The list of files you saved, at most 50, is kept on your phone, or in your browser for the web app, and nowhere else.

  • No Google code in Lite and OCR

    Usugami Lite and Usugami OCR contain no Google code and make no network connections. In the main edition, only text recognition uses Google Play services.

Read the privacy policy

Android app

Three editions

Every edition has Images, Word, PowerPoint, Excel and EPUB to PDF and every PDF tool, fully offline. They differ only in text recognition (OCR).

  • Usugami

    Recommended

    About 3 MB

    Text recognition runs on your phone through Google Play services, which downloads Google’s model the first time you use each language. Pick it if you’re not sure.

  • Usugami Lite

    About 2.8 MB

    No text recognition. The smallest app, with no Google code at all, and it never needs the internet.

  • Usugami OCR

    About 14 MB

    Open-source text recognition built into the app. Works with no internet, forever, and without Google Play services.

Compare and download

Open source

Free software, for any purpose

Usugami is free and open source, with no ads or paid features. You can use it for any purpose, including commercial work. It is licensed under the GNU General Public License, version 3 or (at your option) any later version. Copyright © 2026 Nathan Kumtakar.

Because text recognition in the main edition uses Google ML Kit, which isn’t open source, the license includes an additional permission that allows combining Usugami with it. Usugami Lite and Usugami OCR contain no Google libraries.

This website and the web app are free software too, under the same license. Their source code is in its own repository, with the third-party notices for the libraries, fonts and data the web app includes.

Like Usugami? Please star the repository. It’s free and helps other people find the app.

Nath-Goa/usugami on GitHub

Source code License: GPL-3.0-or-later Questions and ideas Report a problem