PDF Compressor

Reduce the file size of a PDF while keeping it readable.

Low = best quality · High = smallest file.
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How to use PDF Compressor

Three quick steps — no sign-up needed

  1. Step 1

    Upload your PDF

    Drag and drop your PDF into PDF Compressor, or click to browse.

  2. Step 2

    Choose compression

    Pick a quality level — see the size saving before you download.

  3. Step 3

    Download

    Save your smaller PDF, optimised for sharing and faster loading.

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About PDF Compressor

PDF Compressor is a free online tool that lets you reduce the file size of a pdf while keeping it readable — straight from your browser, with no software to install, no sign-up, and no watermarks. It runs on Windows, Mac, Linux, Android, and iOS, so you can use it on whatever device you happen to have to hand.

It's perfect for shrinking files that are too large to email, upload to a website, or attach to a form. PDF Compressor analyses your file and removes wasted data while preserving the visual quality, so the result looks the same but downloads and shares far faster. Files and data are processed securely and removed automatically afterwards, and many steps run entirely on your own device for extra privacy. Because PDF Compressor is completely free and unlimited, you can use it as often as you need for work, study, or personal projects.

Benefits of PDF Compressor

Smaller file size Cut your PDF down by up to 90% so it's quick to email, upload and store.
Keep the quality Smart compression keeps your file looking sharp while stripping wasted bytes.
Faster loading & sharing Lighter files load faster on the web and slip under email and upload limits.
No watermarks Your compressed PDF comes back clean — never branded or stamped.

Frequently asked questions

How much can PDF Compressor reduce my file size?

It depends on the original, but savings of 50–90% are common while keeping the file looking sharp. You can see the saving before downloading.

Will compressing reduce the quality?

Compression removes wasted data rather than visible detail. At normal settings the difference is hard to spot; you can choose a higher-quality level if you prefer.

Why should I compress my file?

Smaller files upload and email faster, fit under attachment limits, load quicker on websites and take up less storage.