Upload a PDF and the tool re-saves it with optimized compression. Nothing is uploaded.
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Upload PDF to Compress
Optimizes structure to reduce file size
All processing happens in your browser — nothing sent to any server. Back to all tools
Frequently Asked Questions
How much will it be reduced?
PDFs with redundant structure may reduce 10-30%. Already-optimized PDFs may see minimal reduction.
Does compression affect quality?
No — structural optimization only. Text and graphics are not affected.
Is my PDF uploaded?
No — compression uses PDF-lib in your browser.
Why is my file larger after compressing?
Some PDFs are already optimized. Re-saving occasionally adds slight overhead.
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