Compress PDF Online Free | MyToolbox

Reduce PDF file size by up to 80% without losing quality. Free PDF compressor online. No signup, no watermarks.

Drop files or click to upload

Accepts: .pdf files

Files are processed on our secure server and automatically deleted after 5 minutes. Max file size: 50MB.

How to Use PDF Compressor

1

Upload your PDF

Drag and drop your PDF file or click to browse. Works with any PDF regardless of how it was created.
2

Choose compression level

Select between light compression (higher quality, moderate size reduction) and strong compression (smaller file, slightly lower image quality).
3

Download the compressed PDF

See the original and compressed file sizes, then download your optimized PDF.

Why Use Our PDF Compressor

Up to 80% Size Reduction

Advanced compression optimizes images, removes redundant data, and streamlines the PDF structure. Most files see 40-80% size reduction.

Adjustable Compression

Choose light, medium, or strong compression depending on whether you prioritize quality or file size.

Text Stays Sharp

Text and vector graphics are not affected by compression. Only raster images are optimized, so documents remain crisp and readable.

Email-Ready Output

Compress PDFs to meet email attachment size limits. Turn a 25 MB report into a 5 MB file that any email provider accepts.

No Watermarks

The compressed PDF is identical to the original except for file size. No added branding or quality stamps.

Frequently Asked Questions

Is the PDF compressor free?

Yes, completely free. Compress as many PDFs as you need with no limits, no signup, and no watermarks.

Is my PDF data secure?

Your file is processed and automatically deleted after compression. We do not read, store, or share your documents.

How much smaller will my PDF be?

Results depend on the content. PDFs with large images typically see 60-80% reduction. Text-heavy PDFs with few images may see 10-30% reduction.

Can I compress PDFs for email attachments?

Yes. This is the most common use case. Compress a large report or portfolio to fit within Gmail's 25 MB attachment limit or Outlook's 20 MB limit.

How does this compare to Adobe Acrobat's compressor?

Adobe Acrobat Pro costs $22/month. MyToolbox provides free PDF compression with comparable quality for most common documents.

Does compression affect text quality?

No. Text and vector elements remain perfectly sharp. Compression only affects embedded raster images, and even those remain visually clear at the default setting.

Does this work on all devices?

Yes. The tool works in any modern browser on Windows, Mac, Linux, Chromebooks, iOS, and Android devices.

Is there a file size limit?

Files up to 100 MB are supported. For extremely large files, strong compression typically brings them well under email attachment limits.