Purpose: Reduce the file size of your PDF by removing unused objects and compressing internal structures. Runs entirely in your browser.
Compress PDF
The Compress PDF tool reduces a PDF's file size by optimising its internal structure, making documents easier to email, upload, and store.
Shrink oversized PDFs
PDFs full of high-resolution images or redundant data can be surprisingly large. The compressor optimises the file - removing unused objects and reducing internal bloat - to bring the size down so it fits within email attachment limits and upload caps, and downloads faster for whoever you send it to.
Balance size and quality
Compression that re-encodes images trades some visual quality for a smaller file; for mostly-text documents the savings come with virtually no visible change. Processing is done on your device, so confidential PDFs stay private. To reduce pages instead of size, see Split PDF.
Frequently Asked Questions
How does PDF compression reduce size?
It optimises the file's internal structure - removing unused objects and reducing bloat, and can re-encode images at a smaller size.
Will compressing lower the document quality?
For text-heavy PDFs, the change is negligible. For image-heavy files, there may be a slight quality trade-off for the smaller size.
Is my PDF uploaded to compress it?
No. Compression runs in your browser, so your document stays on your device.
Why compress a PDF?
To fit email attachment limits and upload caps, save storage, and make the file download faster for recipients.
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