Free online tool
Compress PDF online — reduce file size free
Shrink PDF file size for email and sharing. Choose high, medium, or strong compression and preview the result before downloading.
OyoPdf Compress PDF runs in your browser — your document stays on your device.
Why use OyoPdf
- Free compression with quality presets
- Preview before download
- Text stays sharp; images optimized
- Browser-based privacy
- Up to 20 MB per file
How to compress pdf online
- Upload your PDF.
- Select a compression preset.
- Preview and download the smaller file.
Frequently asked questions
- Will compression ruin text quality?
- Text remains sharp. Compression mainly affects embedded images.
Learn more
Read the full guide: How to Compress a PDF Without Losing Quality. Browse all PDF guides or conversion tools.