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Compress PDF

Shrink a PDF so it is easy to email, upload or store, without leaving your browser. Free and private.

100% privateFree foreverWorks everywhere

Select a PDF

Drag files here or click to choose

Everything runs in your browser. Your files are never uploaded.

Why use this tool

Smaller files

Rebuild and optimise the document to bring the file size down.

Meet upload limits

Get under the size caps on email, forms and government portals.

Stays private

Compression runs on your device, so the file is never uploaded.

How it works

  1. 1

    Add your PDF

    Drop in the PDF you want to make smaller.

  2. 2

    Compress

    Click Compress PDF and the document is optimised in place.

  3. 3

    Download

    Save the lighter file, ready to send or upload.

Compress PDF. Working with business documents on a laptop

When to use it

  • Email attachments

    Fit a heavy PDF under the 10MB or 25MB limits most inboxes enforce.

  • Online forms

    Meet strict upload caps on job, visa and tender application portals.

  • Storage and backups

    Keep archives smaller so they take up less space over time.

Frequently asked questions

How do I reduce the size of a PDF?

Add your PDF above and click Compress PDF. The tool rebuilds the document with an optimised structure and gives you a smaller file to download.

How much smaller will my PDF get?

It depends on the file. Documents with heavy or duplicated structure shrink the most, while already-optimised PDFs change less.

Will compressing lower the quality?

The tool optimises the file structure rather than crushing images, so pages stay readable and text stays sharp.

Is my file uploaded to compress it?

No. Compression happens in your browser, so your PDF stays private on your device.

Is there a file size limit?

The limit is your device memory rather than a fixed cap, so very large files simply take a little longer to process.

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