Compress PDF — Reduce PDF File Size Online for Free
Make your PDF smaller for easy email sharing or website uploads. Choose from three compression levels.
How to compress PDF
- 1Upload your PDF file to the upload area
- 2Choose a compression level: low (best quality), medium, or high (maximum reduction)
- 3Click 'Compress' and wait for processing
- 4Download the optimized PDF — the resulting file size will be shown
Features
- Three compression levels: low, medium, high
- Shows resulting file size and reduction percentage
- Text, links, and document structure are preserved
- Processed entirely in the browser — files never leave your device
Use cases
- Reduce a PDF before sending it by email
- Prepare a document for upload to a website or portal
- Free up disk space taken by a PDF archive
FAQ
How much can I compress a PDF?
It depends on the content. Image-heavy PDFs can be reduced 2–10×. Text-only documents compress less — they are already compact.
Will compression reduce quality?
Low compression preserves quality almost completely. High compression reduces image resolution — text always stays sharp.
Which compression level should I choose?
For business documents — low or medium: quality is preserved while size drops noticeably. High is for when minimum file size matters more than image quality.
Are links and text preserved after compression?
Yes. Hyperlinks, text content, and document structure are fully preserved at any compression level.
Can I compress a password-protected PDF?
No. First remove the protection using the 'Decrypt PDF' tool, then compress.
The file didn't get smaller — why?
The PDF may already be optimized, or it may contain only text and vector graphics. In that case, image compression has no effect.