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Compress PDF Online for Free

Shrink your PDF file size in three clicks — no software, no account, no waiting. Choose your compression level (Low, Medium, or High) and download a smaller PDF that's ready for email, upload, or storage.

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Why Use This Tool?

Three compression levels: Low, Medium, High
Shows before/after file size comparison
Optimizes document structure without re-rendering pages
Works with any PDF including scanned documents
No file size limit
Private — runs entirely in your browser

How to Compress PDF Online for Free

1

Upload PDF

Drop your PDF file into the upload zone or click to browse.

2

Choose Level

Select Low, Medium, or High compression based on your quality vs. size preference.

3

Compress & Download

Hit compress and download your smaller PDF. See the before/after size comparison.

Frequently Asked Questions

It depends on the original PDF. Text-heavy PDFs may see 10-30% reduction. PDFs with embedded images can shrink by 40-70% on high compression.

No. Our compressor optimizes the PDF structure and metadata. Text remains sharp and fully selectable after compression.

Low is ideal for preserving maximum quality. Medium balances size and quality for most uses. High achieves the smallest file size, best for archiving.

Yes, but gains will be minimal. If the file is already optimized, the output may be the same size as the input — we warn you when this happens.

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