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Summarize what changed between two PDFs

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Upload two versions of a PDF and get a plain-language summary of what changed.

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✨ AI: AI diff summary — sign in to use

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How it works

  1. 1

    Sign in — AI features run on your account, not anonymously.

  2. 2

    Pick a provider and model, or use your own API key.

  3. 3

    Upload your PDF (or paste text) and run Summarize what changed between two PDFs.

  4. 4

    Read or copy the result.

Why use this tool

Every PDF task, one place

Merge, split, compress, convert, sign, and more — no need to juggle separate apps for each job.

Private by default

Most tools process your file entirely in the browser — it's never uploaded. When a conversion needs the server, the file is deleted within the hour.

Works on any device

Runs in the browser on Windows, Mac, Linux, iOS, and Android — nothing to install, nothing to trust but the tab.

Fast by design

No queues and no desktop app to wait on — most jobs finish in a few seconds, right where you are.

Convert to and from any format

Move between PDF, Word, Excel, PowerPoint, images, and HTML — output stays true to your original formatting.

Free, always

Every tool here is free to use, with no watermarks, page limits, or forced trial period.

Frequently asked questions

From the blog

Editing a PDF in Your Browser: How a Client-Side PDF Editor Actually Works

Editing a PDF in Your Browser: How a Client-Side PDF Editor Actually Works

Adding text, filling forms, signing, and rearranging pages without a single byte leaving your machine. Here is what a browser-based PDF editor can do, what it cannot, and why that distinction matters.
How to Make Your PDFs Accessible: Screen Readers and Standards

How to Make Your PDFs Accessible: Screen Readers and Standards

A practical guide to making PDF documents accessible for screen readers and compliant with WCAG standards without rebuilding them from scratch.
How to Sign, Secure, and Password Protect Your PDFs Online

How to Sign, Secure, and Password Protect Your PDFs Online

Learn how to protect sensitive information in your PDFs, apply password encryption, and electronically sign documents directly in your browser securely.

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