Free online tool
Compress PDF Online
Compress PDF file size online for free. Reduce large PDFs for email, upload portals, or sharing. No signup, with files removed after secure processing.
Compress PDF Online
Compress PDF file size online for free. Reduce large PDFs for email, upload portals, or sharing. No signup, with files removed after secure processing. Choose your file, review the selected list, then start the tool. The browser sends the file to the processing API and returns a downloadable result.
How it works
Compression works best when the PDF contains images, scans, or redundant embedded data. Keep the original file and use the compressed result for sharing, portals, or storage limits.
The result uses the shown output filename as a fallback when the server does not provide a specific download name. compressed.pdf
File limits
One PDF file, up to 50 MB.
A text-only PDF may already be small, while photo-heavy scans can shrink much more. If the upload is too large, remove unnecessary pages or split the document before compressing.
Privacy and file handling
Files are used only for the requested PDF task and are removed from temporary storage after processing.
Documents are processed for the compression request you start. Avoid uploading confidential files unless your own policy allows online processing.
Output quality
The tool is tuned for practical everyday documents. Very complex layouts, image-heavy PDFs, or scanned pages can affect the final result.
After download, review signatures, stamps, charts, small text, and scanned pages. A practical compression result should be smaller while remaining readable at normal zoom.
Shrink PDF files for email, upload, or sharing.
Limitations and edge cases
Text-only PDFs may shrink very little because they are already efficient.
Scan-heavy PDFs can shrink more, but small text and stamps may soften.
Some forms and signature workflows can be sensitive to document rewrites.
Example input and output behavior
Input: 18 MB scan-heavy PDF with photos and stamped pages.
Output: smaller PDF intended for portal/email limits; exact reduction varies by content.
Characteristics: visual detail tradeoff is highest on image-heavy pages.
When this tool is not the right choice
Not ideal when archival print quality must remain unchanged.
Not ideal if the PDF already meets size limits and readability is critical.
Common uses
- Reducing a PDF so it fits an email attachment limit or government upload portal.
- Preparing scanned paperwork for a shared folder without sending a very large file.
Troubleshooting
- If the file barely shrinks, the PDF may already be optimized or mostly text-based.
- If the result is too soft, use the original file and reduce only the pages or scans causing the size problem.
Related tools
Complete your document task
Continue through a practical workflow without searching for the next tool.
Guides
PDF file too large to email? How to fix it
Fix a PDF that is too large to email. Learn how attachment limits work, reduce the file safely, split it when appropriate, or share a secure link.
GuidesFrequently asked questions
How does PDF compression work?
The compressor rewrites the PDF with size-focused settings that can reduce images and remove unnecessary overhead.
Will the compressed PDF look exactly the same?
Most files keep good visual quality, but very image-heavy PDFs may show some quality reduction after compression.
Do I need to sign up?
No account or login is required. Upload your file, process it, and download the result.