Why superPDF

Big PDFs and AI that stay on your device. superPDF is free, with no account and no upload.

Six reasons

• Big files stay on your computer

  Open and edit 1 GB PDFs and 2,000-page documents right in your browser. Your files aren't uploaded.

• AI that doesn't take your files

  Chat, summaries and agents run on your device or with your own AI key. No superPDF server in between.

• Scanned pages, read for you

  Scans are recognized automatically. For hard pages, an optional open model reads them more accurately, on your computer.

• Agents you stay in charge of

  Describe the result. The agent plans the steps; you approve, edit or skip each one, and can undo it.

• Works with your AI tools

  A command-line tool, REST API and MCP server let Claude Code, Cursor and Codex work on PDFs on your machine (available from October 14, 2026).

• Free. No account.

  Every tool, with no sign-up and no limits on file size.

Performance

• 10 s

  Redact two pages of a 1 GB, 2,000-page PDF, in your browser.

• 4.4 s

  Turn 2,000 pages into Markdown.

• 2.4 min

  Read 50 scanned pages on your device.

See all measurements