Compress PDF
Compress PDF files online with adjustable quality. Reduce large scanned PDFs privately in your browser with no signup.
How to Use Compress PDF
- Select a PDF from your device or drag it into the upload box.
- Move the quality slider toward a smaller file or sharper pages depending on your goal.
- Click 'Compress PDF' to flatten pages into optimized JPEG-backed PDF pages.
- Compare the original size, compressed size, and percentage saved after processing.
- Download the compressed PDF and keep your original file unchanged.
Tips for Best Results
- Use about 60% quality for email attachments when you need a strong size reduction.
- Scanned PDFs, image-heavy reports, portfolios, and brochures usually shrink the most.
- For contracts or text-only PDFs, choose a higher quality setting to keep lettering crisp.
- If the PDF will be printed, preview the result and use the sharpest acceptable setting.
Why Use DigitalBox24's Compress PDF Tool?
- Reduce bulky PDF attachments before sending them through email or chat.
- Keep document processing private because compression runs on your own device.
- Save storage space on cloud drives, phones, laptops, and shared folders.
- Control the size-versus-quality balance instead of accepting a fixed preset.
Frequently Asked Questions
How much can I reduce a PDF file size?
Image-heavy and scanned PDFs often shrink by 40-80%. Text-only PDFs may already be optimized and produce smaller savings.
Will compression change my original file?
No. DigitalBox24 creates a new compressed PDF download. The original PDF on your device is not modified.
Is my PDF uploaded during compression?
No. The PDF is rendered and recompressed inside your browser, so the file stays on your device.