Is the compressed PDF watermarked?

No, we never add watermarks. Your compressed PDF looks exactly like the original, just smaller in file size.

Can I compress password - protected PDFs?

Yes, you'll need to enter the password first. Your password is only used for processing and is never stored.

Does this work on mobile devices?

Yes, our PDF compressor works on all devices including iPhones, Android phones, and tablets. No app required.

Compress PDF - Online PDF Compressor

Compression happens entirely in your browser. Your PDF is not uploaded to our servers.

How to reduce PDF file size When email attachments fail or an upload has a strict size limit, shrinking the PDF is often the only option. Compress in your browser without installing anything. When possible, files stay on your device. Useful for office workers and students. Useful when: • emailing PDFs • submitting forms with limits • saving storage space

Reduce PDF file size while keeping text and images readable. Useful for email attachments, uploads, and storage.

Show detailed guide & explanations▼

Why you may need this tool

PDF uploads often fail due to size limits in email, portals, and document management systems. Scans and image - heavy PDFs are especially prone to large file sizes. When deadlines are tight, recreating the file is costly; compression is usually the fastest first step. Compression is a practical way to reduce size while keeping the content readable for submission or sharing.

How to use

Upload the PDF, choose a compression level if available, and then verify readability on key pages after compression.

Upload your PDF file by clicking or dragging
Select compression level (low, medium, or high)
Click 'Compress' to reduce file size
Download your compressed PDF

Examples

Meeting portal upload limits for scanned documents

Portals often enforce strict size limits. Compressing a scan can make the difference between repeated failures and a successful upload.

Emailing a PDF without exceeding attachment limits

Email systems commonly reject large attachments. Compressing first reduces friction and avoids switching to alternative delivery methods at the last minute.

Benefits & differentiators

Reducing file size improves upload and delivery success. Smaller PDFs also reduce storage overhead and speed up sharing, especially on slower networks. A careful review step matters: compression can affect image clarity, so verifying legibility and important details helps ensure the compressed file still fits the purpose.

Who this is for

Recommended if you: - upload PDFs to portals with size limits - share scans and image - heavy documents - need faster delivery and smaller storage footprints - want a quick first step before recreating a file