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Compress PDF Document

Reduce file size while optimizing quality for web and email.
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Compression Level
Recommended
Less Comp. Good Quality Max Comp.
Custom KB

Standard compression. Balances size reduction with good document quality.

  • On your device
  • Max 100 MB per file
  • Works offline after first use
  • Usually a few seconds, up to a minute for a small target size on many pages
  • Current versions of Chrome, Edge, Firefox and Safari on desktop, Android and iPhone.
  • Works offline after first use
  • Compression re-renders pages as images, so text in the result is no longer selectable. Use a higher quality level to keep small text readable.
  • Trust Center

About Compress PDF

Reduce PDF file sizes quickly using our free PDF compressor. Choose your compression level, optimize documents for faster sharing and email delivery, and download a smaller file — all without uploading to external servers.

What is PDF Compression?

PDF compression reduces document file size by optimizing internal resources such as embedded images, fonts, and metadata. The result is a smaller file that loads faster, uploads quicker, and is easier to share — while keeping document content readable and functional.

Features

  • Reduce PDF file sizes with adjustable compression levels
  • Choose between light, medium, and heavy compression
  • Compress to an exact target size, such as 100 KB or 200 KB, for upload portals and application forms
  • Optimize embedded images within PDF documents
  • Preserve text readability and document formatting
  • Browser-based processing without external uploads
  • No software installation required
  • Supports desktop and mobile devices

Privacy Focused Compression

Document compression occurs locally inside your browser using client-side processing. Sensitive documents are never transmitted to or stored on external servers during the process.

Common Use Cases

  • Email Attachments: Shrink large PDFs to meet email attachment size limits
  • File Storage: Reduce disk and cloud storage consumption
  • Website Uploads: Optimize PDFs for faster download on web pages
  • Sharing: Make documents faster to send via messaging platforms
  • Archiving: Create space-efficient long-term document archives

Compression Level Guide

Light compression reduces file size minimally while maintaining near-original quality. Medium compression balances size reduction against visual quality. Heavy compression produces the smallest files with more noticeable quality trade-offs — best for documents where text content is more important than image sharpness.

Why Use This PDF Compressor?

Reduce PDF file sizes instantly without uploading sensitive documents to third-party services or installing additional compression software.

Frequently Asked Questions

Compression reduces file size by optimizing document resources such as images and internal structures while attempting to preserve readability and quality.

Compression levels affect quality differently. Moderate compression generally preserves visual quality while aggressive compression may slightly reduce image fidelity.

Compression reduces storage requirements, improves upload speeds, and makes PDFs easier to share via email and messaging platforms.

Yes. Different compression levels allow balancing file size reduction against document quality.

No. Compression creates a new optimized output file. Your original PDF is not modified — you simply download a separate compressed version alongside your original.

Yes. Choose "To a target size", pick a size or type your own in KB, and the tool finds the highest quality that fits. Turn on grayscale for scanned documents to reach very small targets. If your file is already under the target, it is kept as it is.

On your device. The tool runs inside your browser, so your files are not uploaded to Quickaboo.

100 MB per file. Usually a few seconds, up to a minute for a small target size on many pages. Very large files need more memory, so phones may handle less than computers.

Current versions of Chrome, Edge, Firefox and Safari on desktop, Android and iPhone.

Compression re-renders pages as images, so text in the result is no longer selectable. Use a higher quality level to keep small text readable.

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