Compress PDF
Choose a PDF file or drag it here
Files stay on your device. Never uploaded.
Free · Unlimited use · No signup
Preview
Your PDF is ready
Download Compressed PDFSelected files
Check the file and settings, then try again. You can also choose another file.
Reduce PDF file size with flexible quality options. Choose the right balance between smaller files and image quality for sharing or storage.
How to use Compress PDF
- Select or drag the PDF file you want to compress into the upload area. The file stays on your device and is processed in your browser.
- Review the file name, size, page count, and first-page preview to make sure you selected the correct document.
- Choose a compression level. Less and Recommended Compression preserve selectable text. Extreme Compression reduces image-heavy PDFs more by converting pages to readable JPEG images, so text will no longer be selectable.
- Click Compress PDF, wait for processing to finish, then review the size reduction and download your optimized PDF.
Frequently Asked Questions
Will compressing a PDF reduce its quality?
It depends on the level you choose. Less and Recommended Compression preserve selectable text. Extreme Compression converts pages to readable JPEG images, which can slightly reduce image quality and makes text no longer selectable in the result.
Are my PDF files uploaded to a server?
No. Compression runs locally in your browser, so your PDF stays on your device and is never uploaded to a server.
Is there a file size or usage limit?
There is no fixed upload or usage limit. The practical limit is your device memory and browser performance, because compression is performed locally in your browser.
Will the original PDF be changed?
No. innoPDF creates a separate compressed copy and leaves the original file unchanged. You can keep both versions on your device.
Why is the compressed file sometimes the same size?
Some PDFs are already optimized or contain little compressible data. innoPDF keeps the original-sized version when a compressed result would be larger, so you do not receive a bigger file.
Which compression level should I choose?
Start with Recommended Compression for most documents. Choose Less Compression when image quality is most important, or Extreme Compression when minimizing file size matters more than image detail.