Open the Compress PDF Tool
Go to our Compress PDF tool. The tool loads instantly with no registration. Your PDF never leaves your device.
How to Compress PDF Files (Free)
Large PDF files can be difficult to email or upload. Our free PDF compressor reduces file size while maintaining readable quality. No sign-up, no server uploads—everything processes in your browser.
Upload Your PDF
Click to select your PDF file or drag and drop it onto the page. The tool will analyze your document and show you the current file size.
Compress and Download
Click "Compress PDF" to reduce the file size. You can often achieve 30–50% reduction with minimal quality loss for text documents. Download your compressed PDF when ready.
When to Compress a PDF
- Email limits — Attachments exceed size limits
- Forms & applications — Uploading to forms or job applications
- Storage — Reducing storage space
- Web embeds — Speeding up page loads for embedded PDFs
What Compression Does
Compression reduces file size by optimizing images and streamlining the internal structure of the PDF. Text and vector graphics are already efficient; the biggest savings usually come from resizing or re-encoding embedded images. The result is a smaller file that remains readable and professional. For more on reducing PDF size for email specifically, see our guide to reducing PDF size for email.