Compress PDF

Shrink your PDF without uploading it.

Reduce PDF file size right in your browser. Choose your quality level, compress in seconds, and download. Your file never touches a server.

Compress a PDF free How it works

Why does file size matter, and why does upload matter?

Sending a large PDF by email, submitting it through a portal, or sharing it with a client is often blocked or slowed by file size limits. The common fix is to "compress it online," which usually means uploading a confidential document to a third-party server you know nothing about.

The difference in one sentence

You shouldn't have to hand a confidential PDF to a stranger's server just to make it smaller.

KeptPDF compresses in your browser. Nothing is uploaded. The file is processed locally using the same rendering engine your browser uses to display PDFs. You can prove it yourself: load the page, turn on Airplane Mode, and compress a file. It still works, because your file was never going anywhere. With the network on you will see only small first-party pings for the quota and analytics, never the document.

How to compress a PDF

Three steps, entirely on your device. No account needed, and nothing gets uploaded.

1. Open your PDF

Drop it onto the page or pick from your device. It loads in your browser, nothing is sent anywhere.

2. Choose compression level

Pick screen (smallest), ebook (balanced), or print (high quality). Preview the estimated size before committing.

3. Download the compressed PDF

Save the smaller file. Text stays selectable. Images compress at your chosen quality.

Smaller file. Nothing uploaded.

No upload

Compression runs in your browser. There's no server to send it to, no third party to retain it, no upload request you can't see in the Network tab.

Quality presets

Smaller (strongest image compression, good for email), Balanced, and Higher quality (best for print and archiving). Pick what fits.

Lossless for text

Text content, vector graphics, and fonts are not degraded. Only embedded images are compressed at your chosen level, so pages that are pure text barely change in size.

Free, no account

Compress PDFs free with no sign-up, no daily limit. Pro ($29/month) supports larger files (hundreds of MB practical limit, browser memory dependent).

More tools that keep your file on your device

Combine multiple PDFs Password-protect a PDF

Questions, answered.

How much smaller will my PDF get?

It depends on what's in it. PDFs that are mostly text compress very little, because the text is already efficient and we leave it untouched. PDFs with many embedded images can shrink 50–80% on the smaller preset. The balanced preset typically achieves 30–60% reduction on image-heavy files.

Will compressing reduce the quality?

Text, vectors, and fonts stay lossless. Only embedded images are compressed. At the higher-quality preset, the difference is imperceptible for most documents. The smaller preset visibly softens images: fine for email, not ideal for print or archiving.

Is it free?

Yes. It's free with no account, no daily limit. Pro ($29/month) supports larger files (hundreds of MB practical limit, browser memory dependent).

Is my file uploaded to a server?

No. Compression runs entirely in your browser, and your file is never uploaded to a server. You can confirm it by opening your browser's developer tools and watching the Network tab while compressing a file: your file never appears in a single request.

Can I compress a password-protected PDF?

You'll need to remove the password first. Use the Unlock PDF tool to strip the password, compress the file, then re-add protection with the Protect PDF tool if needed.

Does it work on my phone?

Yes. KeptPDF compresses PDFs in mobile browsers with the same on-device processing, and nothing is uploaded from your phone.

Compress a PDF. Free, in your browser.

Open Compress PDF