Developer Tools

Compress PDF File Online Free - Secure PDF Compressor

Compress PDF files online for free without uploads. Reduce PDF file size quickly while keeping quality. Secure, private, browser-based PDF compressor.

Select PDF filesor drag and drop PDF files here

Options

Setting these options is optional. The default values are a good start for most cases.

Optimization profile for specific target needs.

Flatten visible signatures into non-editable graphics.

Convert color space of raster images.

PDF OPTIMIZING PROFILES

You can select one of the following profile, depending on your needs:

webOptimization for the web (Default profile)
  • Remove redundant and unnecessary data for the web
  • Down-sample, clip, and intelligently compress images
  • Merge and subset fonts
  • Convert colors to RGB
archiveOptimization for archiving purposes
  • Remove redundant and unnecessary data for archiving
  • Intelligently compress images
  • Merge and subset fonts
printOptimization for print
  • Remove redundant and unnecessary data for printing
  • Down-sample, clip, and intelligently compress images
  • Merge and subset fonts
  • Convert colors to CMYK
mrcOptimization for scanned images
  • Profile optimized for PDFs that mainly consist of raster images
  • Compress the images without significantly reducing the visual quality
maxOptimization for maximal size reduction
  • Use the maximal possible compression
  • Might reduce the visual quality

How to Compress PDF Online

01

Click 'Select File' to upload your PDF document.

02

Choose an optimization profile (Web, Print, Archive, etc.).

03

Adjust settings like 'Flatten Signatures' if needed.

04

Click 'Compress PDF' and download the optimized file.

Key Features

Multiple Optimization Profiles

Choose from Web, Print, Archive, MRC, or Max profiles for tailored results.

Secure Client-Side Processing

Your files are processed locally in your browser and never uploaded to a server.

Structure Optimization

Removes unused objects and optimizes internal PDF structure for smaller file sizes.

FAQ

Can I compress a PDF file online without uploading it?

Yes. This PDF compressor runs fully in your browser with WebAssembly, so your files stay on your device.

How much can this tool reduce PDF file size?

File size reduction depends on content and profile. Scanned PDFs often shrink the most with the MRC profile, while text-heavy files usually keep high quality with smaller gains.

Is this PDF compressor free and watermark-free?

Yes. It is free to use with no hidden fees and no watermarks added to your output PDF.

Does this online PDF compressor work on phone and desktop?

Yes. Because it runs in the browser, it works on Windows, macOS, Linux, Android, and iOS.