Free PDF editor

Every PDF tool you need,
right in your browser

PdfPhi reads, organizes, merges, splits, fills, signs, redacts and protects PDFs. It opens in a tab and works on your own device, so your documents are never uploaded. No download, no account, no watermark.

Open PdfPhi, it's free See what it can do

Works in Chrome, Edge, Safari and Firefox. Best on a laptop or desktop.

PdfPhi showing a 13-page showcase PDF, with the All tools panel on the left and threaded comments on the right
Organize pagesRotate, delete, insert, duplicate and reorder pages, with deep undo.
Merge PDFsCombine any number of files into one, with a bookmark for each.
Split & extractSplit every n pages or pull out just the pages you pick.
Fill & signFill in forms, add text and your signature anywhere on the page.
Comment & mark upHighlights, notes, shapes, ink, stamps and threaded replies.
Protect & unlockAdd a password, set permissions, or open encrypted files from RC4 to AES-256.
RedactBlack out text and areas for good, and remove hidden information.
Find & readSearch as you type, bookmarks, two-up reading and a dark theme.
Organize, merge, split

Move pages around like cards on a table

See every page at once, select a few, and rotate, delete, duplicate or move them into place. Merge several PDFs into one, or split a long document into parts. Links, form fields, layers and bookmarks come along intact.

  • Merge files
  • Split every n pages
  • Extract pages
  • Insert from file
  • Rotate & crop
  • Page numbers
  • Bookmarks
  • Compress
Organize a PDF
PdfPhi's Organize pages grid with three pages selected and the page tools above
An interactive PDF form in PdfPhi with highlighted text fields, checkboxes, radio buttons and a signature field, and the Fields panel listing every value
Fill, sign and comment

Finish the paperwork without printing it

Type into form fields, tick the boxes, add your signature and send it back. Review documents with highlights, sticky notes, shapes and stamps, and keep the conversation going with threaded replies.

  • Fill forms
  • Create forms
  • Signatures
  • Highlights & notes
  • Stamps
  • Watermarks
Fill a PDF
Private by design

Nothing to install. Nothing uploaded.

  • Your files stay on your deviceMost online PDF tools upload your documents to their servers. PdfPhi doesn't: it reads, edits and saves files inside your browser.
  • Starts in secondsNo installer, no sign-up and no trial. Open the page and drop in a PDF.
  • Open source, built in RustA clean-room PDF engine written from scratch in Rust and compiled to WebAssembly. Free forever, with no watermark.
Open PdfPhi
pdfphi.com/app
PdfPhi in two-up Read mode with the dark theme, showing two facing pages of a document

Questions people ask

Is PdfPhi really free?

Yes. There's no trial, no watermark, no page limit and no account. PdfPhi is open source under the MIT and Apache 2.0 licenses.

Are my PDFs uploaded anywhere?

No. PdfPhi runs entirely in your browser on your own device. Your files are read and saved locally and are never sent to a server.

Can I merge several PDFs into one?

Yes. Choose Combine files, pick the PDFs in the order you want, and save the result. Each source file gets a bookmark, and its own bookmarks are nested underneath.

Does it open password-protected PDFs?

Yes. Enter the password and PdfPhi opens files encrypted with anything from 40-bit RC4 to AES-256. It honours the author's permissions, and edits to encrypted files are saved encrypted.

Which browsers does it work in?

Current Chrome, Edge, Safari and Firefox. It works best on a laptop or desktop computer.

Open a PDF right now

Free, private, and in your browser.

Open PdfPhi