Compress PDF
Reduce PDF file size with three compression levels
Click to upload Or drag a PDF here
How to use?
- 1
Upload PDF
Click or drag to upload the PDF file to compress.
- 2
Select compression level
High quality is suitable for everyday sharing, medium quality (recommended) balances quality and size, and low quality gives the smallest file.
- 3
Compress and download
Click "Compress and download" to automatically download the processed file. The interface will show the compression ratio.
FAQ
How does this tool compress PDF files?
The tool recompresses embedded images in the PDF by downsampling them and re-encoding them with adjusted JPEG quality, while fully preserving page structure, text, and vector graphics. It works best for PDFs with many images or scanned pages.
Will files be uploaded to the server?
No. All compression is done locally in the browser, and files never leave your device.
Why doesn't the file get much smaller after compression?
This tool reduces file size by compressing images, so it works best for image-heavy PDFs such as scanned files and illustrated reports. If the PDF is mainly made up of text and vector graphics, it is already relatively small, so compression potential is limited.
Will compression affect text readability?
No. The new method only recompresses images in the document. Text and vector graphics remain unchanged, so text stays sharp after compression and can still be selected, copied, and searched normally.
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