PDF → PDF · Server processing
Compress PDF
Reduce PDF file size with low, medium, or high compression levels.
The instrument
Convert with intent.
Drop a file and set your options. Review the result before downloading.
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Accepts .pdf — max 70 MB
Allowed formats: .pdf. Maximum file size: 70 MB.
Before you convert
Higher compression reduces image quality. Text-only PDFs may not shrink much because there is little to optimize.
Shrink a bulky PDF for email and upload limits
Compress PDF reduces file size by optimizing internal content — mainly recompressing embedded images and stripping redundant data.
Choose low, medium, or high compression. Higher levels shrink more but visibly degrade image quality; low keeps quality nearly intact while removing overhead.
Useful situations
- Fit a document under an email attachment limit.
- Speed up uploads to portals with small size caps.
- Reduce storage for archived scans.
How to use Compress PDF
- Select a PDF within the size limit.
- Pick a compression level — medium balances size and quality.
- Convert and compare the output size against the original.
What to expect
- Image-heavy PDFs shrink dramatically; text-only files may barely change.
- High compression can visibly blur or block images — check before sharing.
- Already-optimized PDFs may not compress further.
Frequently asked questions
Why did my PDF barely get smaller?
Text is already compact, and if images were already well-compressed there is little to reclaim. A PDF that is mostly vector content will not shrink much.
Does compressing a PDF make text fuzzy?
Compression targets embedded images, not the text layer — text stays sharp. Image quality, however, drops at higher levels.
Is it safe to compress a signed or form PDF?
Compression can invalidate digital signatures and may alter form internals. Keep the original when legal validity matters.