Compress PDF Files Online for Free

Compress PDF files in seconds and reduce file size for email and sharing. No uploads during processing.

or drop your PDF here

Processed locally on your device. No uploads during processing.

Upload your PDF, optimize file size, compare quality, and download a smaller file in one workflow.

  • Compress PDF online for free
  • Reduce PDF size for email and uploads
  • No Adobe Acrobat required

Compress PDF

Workspace mode
Local processing
Compress PDF

Upload your PDF, optimize it, then download instantly.

Supported format: PDF

Why use this compress PDF tool

Compress files fast

Reduce PDF size quickly with a clear optimize-and-download flow.

Free to use

Compress PDF files online for free with no account required for basic usage.

No software install

Works in your browser so you can compress PDF files without Adobe Acrobat.

Step by step

How to compress PDF file size

  1. Upload your PDF file.
  2. Click Optimize PDF to start compression.
  3. Review before and after file size and visual preview.
  4. Download your compressed PDF.

Common compress PDF searches we cover

How to compress PDF file size

Upload and optimize one PDF to reduce size quickly.

Compress PDF online for free

Run compression in your browser with no account required for basic use.

Compress PDF for email

Lower file size to make sharing and attachments easier.

Compress PDF without Adobe Acrobat

Use this browser workflow on Mac, Windows, iPhone, or Android.

After compression, you can split large sections, merge files back together, or protect the final PDF.

Compress PDF FAQs

Do you upload or store my PDF files when I compress them?

No. The compression process runs locally in your browser, so your files stay on your device.

Is this compress PDF tool really free?

Yes. You can compress PDF files online for free with no account and no watermark on output.

How do I compress PDF file size?

Upload your PDF, click Optimize PDF, review the result, then download the compressed file.

Will compression reduce PDF quality?

Compression can reduce image quality depending on your file content, but text and layout usually remain clear.

Why did my PDF size barely change?

Some PDFs are already optimized, so additional compression may only reduce size slightly.

Can I compress PDF files without Adobe Acrobat?

Yes. This tool works in your browser, so no Adobe Acrobat installation is required.

How do I compress PDF files on Mac or Windows?

Open this page in your browser, upload your PDF, optimize it, and download the result.

How do I compress PDF files on iPhone or Android?

Use a mobile browser, upload your PDF, optimize it, then download the compressed file.

Can I compress PDF files offline?

In supported browsers, the tool can work offline after first load when required assets are already cached.

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