pdfcosmos

Privacy-first PDF tools

A complete, free, and fast PDF toolkit, built with your privacy in mind. Your files are processed on your device and never uploaded to any server.

PDF tools

Filter tools by category

Organize PDF

· 20 tools
View all Organize PDF tools →

Edit PDF

· 24 tools
View all Edit PDF tools →

Convert to PDF

· 24 tools
View all Convert to PDF tools →

Convert from PDF

· 19 tools
View all Convert from PDF tools →

How it works

Three steps, and your file never leaves the tab it is in.

  • 1

    Pick a tool

    Search or browse all 100 tools and open the one you need. No account, no install.

  • 2

    Your device does the work

    The tool runs inside your browser tab, on your own computer or phone. Your file is never sent to a server.

  • 3

    Download the result

    Save the finished file straight away. Close the tab and nothing is left behind.

Our biggest difference

Your files never leave your device

Most online PDF sites upload your file to their servers, process it there, and ask you to trust what happens next. pdfcosmos does not upload anything. The tools run inside your browser, so your documents stay with you.

  • Processed in your browser

    The PDF engines run on your device, not on our servers.

  • No uploads

    There is no upload step, so there is no copy of your file anywhere else.

  • Nothing is kept

    Files live in the tab's memory only. Close it and they are gone.

  • Check it yourself

    Open your browser's Network tab while you work. You will see nothing sent.

Why pdfcosmos

All the power you need, with none of the usual trade-offs.

  • 100 free tools
  • 6 categories
  • No sign-up
  • No watermarks
  • Works on phone, tablet & desktop
  • Incredibly fast

    The engines are compiled to WebAssembly and run at near-native speed. With no upload or download to wait for, results are nearly instant.

  • Free, no sign-up

    Every tool is completely free. No account, no installs, and no watermarks added to your files.

  • Works everywhere

    Runs in any modern browser, from your phone to your desktop, fully responsive and touch-friendly.

  • Open-source engines

    Your PDFs are handled by mature, inspectable libraries (qpdf, pdf-lib, pdf.js and Tesseract), not a black box.

See the full list of open-source libraries that power pdfcosmos on our Credits & licenses page.