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Big PDFs, supercharged. AI agents, CLI, API and MCP.

Free PDF tools that run in your browser: tested with 1 GB PDFs and 2,000-page documents. No account; files stay on your device.

Visit superpdf.ai Read the docs
  • Free, no account
  • 68 PDF tools
The superpdf.ai home page: Big PDFs, supercharged. AI agents, CLI, API and MCP, with Open a PDF and Chat with PDF buttons and a drop area for a PDF
What it does

PDF tools and AI in one browser tab

Everything is free and needs no account. superPDF sets no file size or page limit.

Work on PDFs

  • 68 PDF tools

    Merge, split, convert to and from Word, Excel and PowerPoint, OCR, compress, edit, fill and sign, redact and more.

  • Big files

    Tested with 1 GB PDFs and 2,000-page documents. Very large files are fastest on a computer.

  • Private by design

    The tools run in your browser and don’t upload your files. AI runs on your device or with your own API key.

AI

  • Chat with PDF

    Ask questions about a PDF. Each answer ends with numbered sources that open the cited page.

  • PDF agents

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

  • High-accuracy reading

    Optional: scanned pages, tables and math read on your device by LightOnOCR-3, a small open model.

For developers and AI agents

CLI, API and MCP server

The same PDF tools run on your computer, from the terminal, your own code or an AI agent. Files stay in the folders you allow.

  • MCP server

    AI agents get tools to read, merge, split, convert and protect PDFs in a folder you choose. Nothing is uploaded.

  • REST API

    A local API on 127.0.0.1 with a token, background jobs and webhooks, described by OpenAPI 3.1.

  • CLI

    Run tools from scripts and the terminal, or chain steps in a pipeline. Outputs are always new files.

Works with

MCP setup for each client

Other compatible agents connect the same way. The command-line tool, which also runs the API and the MCP server, installs from npm from October 14, 2026; setup steps are in the superPDF docs.

Product names and logos belong to their owners and are shown only to indicate compatibility.

Under the hood

Built with

The LightOnOCR-3 models superPDF uses are published at huggingface.co/superpdf. Where your files go.

Open a PDF, any size

Free, in your browser, no account.

Visit superpdf.ai Read the docs