What is the difference between the three compression levels?

High compression gives smallest size (up to 90% reduction) but may affect image clarity. Medium balances size and quality (50-70% reduction). Low maintains best quality with 20-40% size reduction.

Will the text be affected by compression?

No, text remains clear and copyable/searchable in all compression levels. Compression only affects embedded images and graphics.

Why didn't my file size change much after compression?

If the file contains only text or already-compressed images, it won't shrink much. Files with uncompressed or high-resolution images benefit the most.

Can I compress an already-compressed file again?

You can try, but results will be limited. Each additional compression gives less reduction and may affect quality. We recommend compressing once at the appropriate level.

Does compression change the number of pages?

No, compression does not change file content or page count. It only reduces storage size by optimizing embedded images and fonts.

optimize

Compress PDF

Compress PDF files up to 90% smaller — perfect for email attachments under 25MB. No quality loss, no signup, no software. Shrink any PDF in seconds. Try free!

Choose PDF file

or drag and drop

Supported: .pdf

About This Tool

Compress PDF files up to 90% smaller — perfect for email attachments under 25MB. No quality loss, no signup, no software. Shrink any PDF in seconds. Try free!

Your files are secure and automatically deleted within 1 hour

Tutorials

How to Compress PDF Files Without Losing Quality

Practical techniques I use daily to reduce PDF size while keeping documents sharp and professional.

Read article8 min read

What is this tool?

The PDF compression tool reduces PDF file sizes while maintaining content quality. This tool is essential when you need to send large files via email (which typically limits attachments to 25MB), save storage space, or speed up document loading on the web. We offer three compression levels to choose what suits your needs. The tool uses smart algorithms that distinguish between text, images, and graphics, applying different compression ratios to each type. The result: up to 90% file size reduction while maintaining text clarity and acceptable image quality. Ideal for sharing financial reports, emailing presentations, or uploading documents to government platforms with file size limits.

How to Use

1Upload the PDF file you want to compress
2Choose compression level: High (smallest size), Medium (recommended), or Low (best quality)
3Click the "Compress PDF" button
4Wait for processing then download the compressed file
5Compare the new size with the original size

Key Features

Three compression levels to choose from

Reduce size by up to 90%

Maintain readability

Smart image and font compression

Suitable for printing and sharing

Display size savings percentage

Tips & Best Practices

💡For email: use "High" compression to reduce size under 25MB — Gmail and Outlook limit.
💡For printing: use "Low" compression to maintain image quality at 300 DPI.
💡Text-only files (no images) won't shrink much — text is already compressed by nature.
💡Files with high-resolution images (like photographs) will get the highest compression ratio.
💡To compress multiple files: compress each separately then merge — this gives better results than merging first.

Frequently Asked Questions

Your files are safe and protected. All files are processed over an encrypted connection and automatically deleted from our servers within one hour.

Rate this tool