Open Madosuite
Alpha, about 55% ready for everyday work

PDF, a free PDF reader and editor in your browser

Read, organise, combine, split, fill, comment, redact and secure PDFs. A free alternative to Acrobat Pro.

Open PDFPDF vs Acrobat Pro

Opens

PDF (including encrypted)

Saves

PDFPNG pagesDOCX (layout is lost)

What PDF does

From the app’s own documentation, version 0.16.1.

Tools

  • Combine, extract and split, keeping links, forms and attachments
  • Rotate, delete, insert and move pages
  • Comments, form filling and form authoring
  • Redaction and sanitizing
  • Password security up to AES-256
  • Search as you type, bookmarks and thumbnails
  • Basic digital signatures and an Accessibility Checker
  • Editable document properties

Files it opens

PDF (including encrypted)

Files it saves

PDFPNG pagesDOCX (layout is lost)

Not there yet

  • Reliable editing of existing text
  • OCR beyond Latin script
  • Printing from the browser build

What PDF replaces

The paid apps people use for the same job. Prices from the vendors’ US pages on 14 November 2026.

PDF instead of Acrobat Pro

Acrobat Pro costs US$19.99 a month on an annual plan, billed monthly (US$29.99 month to month).

Read the comparisonPDF instead of Creative Cloud Pro

Creative Cloud Pro costs US$69.99 a month on an annual plan, billed monthly (US$779.88 a year paid up front).

Read the comparisonPDF instead of Microsoft 365

Microsoft 365 costs US$99.99 a year (or US$9.99 a month) for Microsoft 365 Personal.

Read the comparison

Open a file with PDF

Open .pdf files

The fixed-layout document format for forms, contracts, papers and print.

PDF questions

Is PDF free?

Yes. PDF is part of Madosuite, which is free. It runs in your browser on your own device.

Which files does PDF open?

PDF (including encrypted). It saves PDF, PNG pages, DOCX (layout is lost).

Is PDF ready for real work?

Alpha: its makers rate it about 55% ready for everyday work. Not there yet: reliable editing of existing text; ocr beyond latin script; printing from the browser build.

Can PDF replace Acrobat Pro?

For combining, splitting, filling, signing and redacting PDFs, often yes, and free. PDF does not yet edit existing text reliably, has no OCR beyond Latin script, and cannot convert Office files to PDF.

Where are my files kept?

In the browser on your device, inside Madosuite’s own Linux machine, in its home folder. Your files are not uploaded to us. Clearing the site’s data in your browser deletes them, so download what you want to keep.

Who makes the apps?

The suite apps are the ArtCraft team’s open-source Crafting Apps, under the MIT or Apache-2.0 licence. Madosuite puts them on one desktop in your browser, with Files, a Terminal and Edix, the code editor. See credits.

More apps in Madosuite

Word

Write and lay out documents with the ribbon, styles, tables, track changes and references you already know, and save real .docx files.

Grid

Spreadsheets with 500+ functions, dynamic arrays, pivot tables and charts, saved as .xlsx.

Deck

Build slide decks with themes, charts, transitions and animations, open and save .pptx, and present full screen.

Photo

Edit images with layers, masks, adjustment layers, layer styles and type, and open and save real .psd files.

PDF is PdfCraft 0.16.1 by the ArtCraft team, open source under MIT or Apache-2.0. Credits.