Compress PDF

Compress PDF files online to reduce file size. Free, private, browser-based PDF compressor with adjustable quality.

How to Use Compress PDF

1. Upload your PDF file by dragging it into the upload area.
2. Adjust the quality slider to balance between file size and visual quality.
3. Click 'Compress PDF' to start the compression process.
4. View the compression results showing original size, compressed size, and percentage saved.
5. Your compressed PDF downloads automatically.

Tips for Best Results

• For email attachments, use Medium quality (60%) which typically reduces file size by 50-70%.
• PDFs with high-resolution images benefit most from compression.
• Text-heavy documents are already small — expect 10-20% savings.
• Use Maximum quality for documents that will be printed professionally.

Why Use DigitalBox24's Compress PDF Tool?

• Send large PDFs via email without hitting attachment size limits.
• Save storage space on cloud drives and local devices.
• Faster upload and download speeds for shared documents.
• Adjustable quality ensures you get the right balance for your needs.

Frequently Asked Questions

How much can I reduce a PDF file size?

Typically 40-80% depending on the content. Image-heavy PDFs see the largest reductions.

Does compression reduce text quality?

No. Text remains sharp and readable. Only embedded images are re-encoded at the chosen quality level.

Can I compress a password-protected PDF?

You need to remove the password first, then compress, and optionally re-add password protection.