Yes, 100% safe. Files are processed exclusively in your device's browser memory, without uploading to any server.

How much can the PDF file size be reduced?

The reduction depends on the content. PDFs with high-resolution photos or heavy graphics can typically be reduced by 50% to 80% of their original size.

Does the text remain readable?

Yes. Compression balances resolution and rendering to ensure complete text sharpness for on-screen reading or printing.

Compress PDF Online

Reduce PDF file size while maintaining the best visual quality.

Click or drag a PDF here Format: .pdf (100% local processing in your browser)

PDF

document.pdf

0 pages • Tamanho original: 0 KB

Choose compression level:

Extreme

Smallest size possible. Ideal for sending by email with a strict attachment limit.

High compression, lower quality

Recommended

The perfect balance between excellent sharpness and significant weight reduction.

Good quality, good compression

Low

Subtle compression preserving the maximum original quality of the file.

High quality, low compression

ℹ️ How compression works on Onflip

• Optimization of PDF object streams and removal of redundant metadata.
• Smart resampling of heavy images at the selected DPI level.
• 100% private: all compression processing runs directly in your browser memory.