Online PDF size reducer
Reduce PDF File Size Online
Large PDF files are slow to upload, share and open. Whether you are attaching a document to an email, uploading it to the cloud or submitting a form, reducing file size is one of the most useful PDF fixes.
Reduce PDF sizeWhat makes a PDF file large?
Image resolution usually has the biggest impact. Photos, scans and screenshots can add several megabytes per page. The page count, embedded fonts and scan quality also affect the final size.
A document exported for high-quality printing may be much larger than necessary for email or online reading. A PDF file size reducer can lower that overhead while keeping the content clear.
How to reduce PDF file size in seconds
Choose the compression level that matches how you plan to use the document.
- Open the PDF compressor and choose the document you want to make smaller.
- Select Strong for the smallest result, Balanced for everyday sharing or Light when print detail matters most.
- Preview the compressed PDF, compare the size and download the version that fits your needs.
How small can you make a PDF?
With Strong compression, most PDFs can be reduced by 50–80%. The result depends on how much image content the file contains.
Scanned documents and presentations usually have the most room for reduction. Files that mostly contain text may already be compact, so the change is smaller.
| Document type | Typical reduction |
|---|---|
| Scanned documents | 50–80% |
| Presentations and portfolios | 40–75% |
| Text-first documents | 15–45% |
Other ways to reduce PDF size
Remove pages that recipients do not need, extract only the relevant section or optimize the PDF for faster web viewing. These steps can lower PDF size further when compression alone is not enough.
Frequently asked questions
What is the best way to reduce PDF file size?
Compress the PDF with Balanced mode first. Switch to Strong for strict email or upload limits, and remove unnecessary pages if needed.
Does reducing PDF size affect print quality?
It can reduce image detail. Use Light compression for documents intended for high-quality printing and preview the result before downloading.
Can I reduce the size of a password-protected PDF?
Unlock the PDF with the correct password first, then compress the unlocked copy.
Is there a limit to how much I can reduce a PDF?
Yes. The result depends on the original content. Image-heavy PDFs shrink more than files that are already optimized or mostly text.