Compress PDF Without Losing Quality

Reduce PDF file size by up to 90% — processed entirely in your browser. No upload to servers, no signup, no file size limit.

Features

• No data transfer: Zero data transfer
• Works offline: Works offline
• HIPAA-friendly: HIPAA-friendly

How to use

1. Upload PDF: Select the PDF document from your local storage or drag it into the box.
2. Choose compression: Select the level of optimization you need for your file.
3. Download: Instantly save your compressed PDF without any watermarks.

FAQ

• Q: Is RefineDoc really free to use?
  A: Yes, RefineDoc is 100% free with no hidden charges, subscription requirements, or daily limits. We built this as a utility-first tool for everyone.
• Q: How does 'no upload' compression work?
  A: We use WebAssembly which allows your browser to run high-performance code. The compression engine runs locally in your browser tab, processing the file without ever sending data to a server.
• Q: Will the quality of my PDF decrease?
  A: Our 'Recommended' setting is designed to find the perfect balance. It optimizes image resolution and removes unnecessary metadata while keeping text crisp and vector graphics sharp.
• Q: Are my files safe?
  A: Absolutely. Since your files never leave your computer, no one else can see or access them. This makes RefineDoc safer than traditional cloud-based converters.
• Q: Is there a file size limit?
  A: There are no artificial limits. The only limit is the available RAM on your device, meaning you can often compress files that cloud services would reject for being too large.
• Q: Can I use RefineDoc offline?
  A: Yes! Once the page is loaded, the tool works completely offline since all the processing happens in your browser locally.