PDF Compressor
Reduce PDF file size for email, online forms, assignments, and document sharing with adjustable compression levels, readable output, and no signup.
Upload PDF File
Choose one PDF, optimize it, and download the smaller version.
Compression Level Selector
Choose the balance between size reduction and visible quality.
Before/After Size Display
Download Compressed PDF
Your optimized PDF is ready.
How to use
Upload your PDF
Select the file you want to shrink for email, upload portals, or sharing.
Choose compression level
Pick low, medium, or high depending on whether quality or file size matters more.
Compress and download
Run the compression, review the size difference, and save the optimized PDF.
What is PDF compression?
PDF compression reduces the size of a PDF while keeping the document readable. It is useful when an email inbox, school portal, job application, government form, or business upload page rejects large files.
This free PDF compressor is designed for the long-tail task people usually search for: compress PDF without losing quality. The tool gives you low, medium, and high compression choices so you can decide whether readability or the smallest file matters more.
Why reduce PDF file size?
Smaller PDFs upload faster, download faster, and are easier to share on mobile data. Compression is especially helpful for scanned documents, reports with photos, invoices, assignment files, resumes, certificates, and multi-page PDFs.
Lossy vs lossless compression
Lossless compression keeps quality nearly unchanged, while lossy compression removes some visual detail to save more space. Higher compression usually means smaller files but more visible quality changes, especially on scanned pages and screenshots.
Best practices for optimizing PDFs
- Use low compression for contracts, forms, certificates, and text-heavy documents.
- Use medium compression for most email attachments and everyday sharing.
- Use high compression for large scanned PDFs and strict upload limits such as 100KB, 200KB, or 1MB.
- Keep the original file if you may need maximum quality later.
- Open the compressed PDF and zoom in before submitting it to make sure the text is readable.
More PDF workflows
Merge related files
Combine multiple PDFs into one document before submission or archiving.
Split large documents
Extract only the pages you need before compressing the final PDF.
Convert documents
Turn Word documents into PDFs before sharing a polished final version.
Add watermarks
Mark drafts, confidential documents, and proofs before sending them.