Compress PDF
Reduce your PDF file size by re-optimising its internal structure. Works best on PDFs with redundant objects or uncompressed streams.
Compression removes redundant internal objects and re-serialises the file. Results vary — PDFs that are already well-optimised may see little or no size reduction. This tool does not downsample or remove images.
Drop a PDF here or click to select
Select a PDF file. Processing happens entirely in your browser.
How it works
- 1. Select fileChoose a PDF from your device.
- 2. CompressClick Compress PDF. The tool re-serialises the document, removing redundant data.
- 3. DownloadIf the result is smaller, download it. Original and compressed sizes are shown honestly.
Frequently asked questions
- Why didn't my PDF get smaller?
- PDFs that are already well-optimised have little redundant data to remove. This tool re-serialises the internal structure but does not downsample images or remove content.
- Are my files uploaded to a server?
- No. All compression happens in your browser. Your PDF never leaves your device.
- Will compression affect the quality of my PDF?
- No. This tool only removes redundant internal data. Text, images, and layout are not changed.
- Can I compress a password-protected PDF?
- No. The file must be an unencrypted PDF. Remove the password first if needed.