Compress a PDF file for free

Reduce the size of your PDF files for free in just a few clicks

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Drag-and-drop your file or click here to

Compressing PDFs is simple and easy!

Compress your PDF files in just a few clicks. It's easy and free. Start by selecting or dragging-and-dropping your PDF file directly on our website.

Your files are private

All files compressed using our service are kept private. We do not resell or share any of your personal data.

Compatible with all your devices

1pdf is compatible with your computer (linux, macOS, Windows...) and your smartphone or tablet (iOS, Android...).

A powerful Cloud architecture

Our 1pdf service provides an upgradeable and high-performing platform to ensure our tools and your PDF files are readily available.

Unlimited use

1pdf is a free online service offering unlimited use. Merge, divide, compress, convert, encrypt, or rotate your PDF files in just a few clicks.

How can I compress a PDF file for free?

1. Select the file you would like to compress

To start using this tool, first select the PDF file(s) you would like to compress on your computer, smartphone, or tablet.

2. Choose a compression level

Once the PDF files are uploaded, choose a level of compression and click on submit to start the compression.

3. Download the compressed file

Voilà! Download or share your compressed PDF file(s) on your computer or smartphone and get compressing again whenever you'd like.

Why use 1pdf to compress files?

Are you looking to send one or several PDf files via email but your email host has a size limit on attachments? Are you filling a form that requires you select and send one or several PDF files but the website has a size limit for these files?

1pdf lets you choose the compression level for your PDF files and documents. Choose low compression to get the highest document quality, medium compression for a standard quality and a medium compression level, or choose high compression for a low quality document and a high compression level.

This way you can email your PDF file(s) without exceeding the attachment size limit set by your email host. You can also upload the PDF file(s) on an online form without exceeding the size limit.

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