Compress PDF Online
Reduce PDF file size directly in your browser. Choose compression quality and resolution, then download the optimized PDF without uploading your file.
Drop your PDF here
or click to choose a PDF file
Compress PDF files privately in your browser
FixImageFormat's free PDF compressor reduces the size of PDF documents directly on your device. Your original PDF is processed locally in your browser instead of being uploaded to a remote server.
How to compress a PDF
- Select or drag and drop your PDF file.
- Choose a compression preset or adjust quality and resolution manually.
- Click Compress PDF.
- Download the resulting smaller PDF.
What does PDF compression do?
PDF compression reduces the amount of data required to store a document. Image-heavy PDFs can often become much smaller by reducing image resolution and JPEG quality. The amount of reduction depends on the contents of the original document.
Is this PDF compressor private?
Yes. Processing happens in your browser using JavaScript and WebAssembly-compatible browser technologies. Your PDF does not need to be uploaded to FixImageFormat's servers.
Why didn't my PDF become much smaller?
PDFs that already contain compressed images, mostly text, or vector graphics may have limited compression potential. Image-heavy scanned PDFs generally provide the biggest reduction.
Frequently Asked Questions
Can I compress a PDF for free?
Yes. FixImageFormat provides PDF compression directly in the browser without requiring a paid subscription.
Does my PDF get uploaded?
No. The compression process runs locally in your browser.
Can I choose the compression level?
Yes. You can select Maximum, Balanced, or Quality, or manually adjust image quality and resolution.
Will compression reduce PDF quality?
Stronger compression can reduce image quality. The Balanced preset is designed to provide a practical compromise between file size and visual quality.