Free PDF compressor.

Compress large files into a tidy PDF for easy sending.
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You’ve got the files, we’ve got the tools.
Try Lumin's free PDF compressor tool.

  • Reduce the size of your PDFs

    Reduce the size of your PDFs

    When it comes to sending crucial documentation, you want to ensure it reaches its destination! That’s where we come in. Compress to reduce the size of your PDF and send it on its way.

  • Compress and go

    Compress and go

    Our tool is quick and easy to use. Just create your free account with Lumin Tools, select Compressor and upload your files. You’ll be good to go.

  • Compress, don't zip

    Compress, don't zip

    While the old right-click and zip method is common, it can corrupt your data; especially when it’s transferred from person to person. Keep your info safe and compress with Lumin instead.

  • Reduce the size of your PDFs

    Reduce the size of your PDFs

    When it comes to sending crucial documentation, you want to ensure it reaches its destination! That’s where we come in. Compress to reduce the size of your PDF and send it on its way.

  • Compress and go

    Compress and go

    Our tool is quick and easy to use. Just create your free account with Lumin Tools, select Compressor and upload your files. You’ll be good to go.

  • Compress, don't zip

    Compress, don't zip

    While the old right-click and zip method is common, it can corrupt your data; especially when it’s transferred from person to person. Keep your info safe and compress with Lumin instead.

  • Reduce the size of your PDFs

    Reduce the size of your PDFs

    When it comes to sending crucial documentation, you want to ensure it reaches its destination! That’s where we come in. Compress to reduce the size of your PDF and send it on its way.

  • Compress and go

    Compress and go

    Our tool is quick and easy to use. Just create your free account with Lumin Tools, select Compressor and upload your files. You’ll be good to go.

  • Compress, don't zip

    Compress, don't zip

    While the old right-click and zip method is common, it can corrupt your data; especially when it’s transferred from person to person. Keep your info safe and compress with Lumin instead.

Do more doing with Lumin.
Try our PDF compressor for free.

How to compress a PDF

  • 1. Sign up

    Head to tools.luminpdf.com, a sub-site of Lumin, and create a free account. Once logged in, select the ‘Compressor’ tool.

  • 2. Add files

    Drag and drop your files or upload them straight from Google Drive, Dropbox or your computer.

  • 3. Download & go

    Done! Once your PDF file size has reduced, you can download your finished file or save it to your preferred document storage solution.

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Frequently Asked Questions

  • What is Lumin vs Lumin Tools?

    Lumin Tools is a sub-site of Lumin hosting more advanced editing features such as the PDF Unlocker tool, OCR reader, Convert, Compress and more. Both sites are completely free to use.

  • Is Lumin free?

    Sure is! Though we do have options for people and businesses wanting to unlock all our features – such as unlimited storage and certain tools only available to Pro and Business users – you can try Lumin Pro free for 7 days, or stay on a Free plan. Discover our plans to learn which one is the right fit for you.

  • How do I use Lumin?

    Lumin works on your browser, or you can download our desktop app and keep Lumin handy on your computer. We’ve also got a mobile and tablet app which includes Lumin’s most popular features.

  • Can I just compress a PDF and go?

    Yes, absolutely. You do need to create an account in order to use Lumin Tools, but it’s easily done and you’ll be accessing the compressor function in no time. You’ll have a range of other PDF features at your disposal too, should you choose to explore them.

  • Why is compressing better than ZIP?

    When you ZIP a PDF file and send it from person to person, your files and data have a higher chance of becoming corrupt along the way. Plus, Lumin’s compressor tool is fast, easy and free. Save yourself the trouble and compress from the get-go!