Compress PDF Online: Reduce File Size in Your Browser
Reduce PDF file size in your browser with adjustable image quality. Best for scanned and image-heavy files, and your files stay private. Compress now.
Drop PDF files here
or choose files from your device. Processing starts only when you press the button below.
How to Compress a PDF
1. Add one PDF. 2. Choose a quality and render scale. 3. Process the file. 4. Compare the output with the original before using it as a final document.
Important Compression Limitation
Because this browser tool rasterizes pages, the resulting document may behave differently from the original PDF. It does not replace a full PDF optimizer. If your document relies on live text, vector graphics, forms or accessibility tags, use a tool that keeps that structure.
PDF Quality vs File Size
Lower JPEG quality and a smaller rendering scale usually produce smaller output. Higher settings preserve more visual detail but may increase the final file size. Test the output when text clarity is important.
Which PDFs Compress Best
The tool rebuilds each page as an image. It helps most with scans, photo-heavy reports and slide decks saved as PDF. A text-only document is often small already, and rebuilding it as images can make it bigger, not smaller. If the result is larger than the original, keep the original.
How to Fit an Email or Upload Limit
- Check the exact size limit of the site or mail service you are using.
- Start with the Balanced setting, then try Higher compression if the file is still too big.
- Lower the render scale (Compact) for a smaller file, at the cost of sharpness.
- If it is still too large, split the document with Split PDF and send it in parts.
Supported Files and Output
Accepts one PDF up to 50 MB. The result is a new PDF built from page images, at the image quality and render scale you choose. Its name starts with compressed-.
Read the guide: How to Compress a PDF and Reduce File Size · What Is PDF Compression?
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Frequently Asked Questions
Can I still select text in the compressed PDF?
No. The compressed file is made of page images, so text selection and search are not preserved. Keep the original if you need searchable text.
How much smaller will my PDF be?
It depends on the file. Scans and photo-heavy PDFs shrink the most; text-only PDFs may not shrink at all.
Is it safe to compress a private document?
The work happens in your browser and the file is not uploaded.