What is Compress PDF and how does it work?

Compress PDF reduces the file size of a PDF so it's easier to email, upload or store. Most of the weight in a PDF comes from oversized images, so that's where the savings are found — the text itself is left alone.

How do I use Compress PDF online?

Upload your file using the box above — drag it in, browse for it, or bring it in from your cloud storage. A preview appears so you can check you've picked the right file. Run Compress PDF, then download the result. You can rename it before you save it.

Is my file secure when I use Compress PDF?

Yes. The file you send to Compress PDF travels over an encrypted HTTPS connection and is processed automatically on our servers. It is never made public, never shared with anyone, and nobody reads it.

Does HuntPDF store my files after Compress PDF has run?

No. Your upload is deleted the moment Compress PDF finishes with it, and the file it produces is removed as soon as you have downloaded it, or when you upload another file, or when you close the page. Nothing is kept, and nothing is used to train anything.

Will the original quality and formatting be maintained?

Text stays perfectly sharp, because it's stored as vectors rather than pixels. Images are where the size is saved, and the default setting is tuned so the difference isn't visible on screen or in print.

Can I use Compress PDF on mobile?

Yes. Compress PDF works in any modern browser on phones and tablets — iPhone, iPad or Android — with nothing to install. You can upload straight from your device or from your cloud storage.

Can I rename my file before downloading it from Compress PDF?

Yes. The file Compress PDF gives you back keeps the name of the file you uploaded by default. If you'd rather call it something else, edit the name in the field next to the download button before you save it.

Do I need to install any software to use Compress PDF?

No. There is nothing to download, install or sign up for — Compress PDF is used from your browser and does the work on our servers, so it behaves the same on Windows, macOS, Linux, Android and iOS.

How long does Compress PDF take?

Most files are finished in a few seconds. A large or page-heavy file takes a little longer, because Compress PDF runs on our servers rather than on your device — but you won't be waiting around. You can upload files up to 250MB.

Is Compress PDF free to use?

Yes. Compress PDF is free, with no signup, no watermark on the result and no daily limit for normal use.

Compress PDF Online

Pick how much to compress, then shrink your PDF on our secure servers.

Drop your file here

Choose file

Processed securely over HTTPS on our servers, then deleted after processing. No file is stored, shared, or used for training.