How is this different from Compress PDF?

Compress PDF applies basic structural compression. Optimize PDF uses a broader set of techniques: image recompression, resource cleanup, font subsetting, object deduplication, and structure optimization. It offers more control over the trade-off between file size and quality.

What optimization level should I use?

Light: minimal quality impact, removes obvious waste. Good for documents you want to keep at high quality. Medium: balanced approach, recompresses images to reasonable quality. Best for most uses. Aggressive: maximum size reduction, noticeably reduces image quality. Best for web-only documents.

Will optimization affect document quality?

Light optimization has virtually no visible impact. Medium and aggressive levels recompress images, which may reduce image sharpness. Text quality is never affected. The preview shows you the result before downloading.

Can I optimize for web delivery?

Yes. The optimization includes linearization, which restructures the PDF for fast progressive loading on websites. Combined with size reduction, this produces the best web-ready PDF possible.

Optimize PDF

Powerful Optimize PDF Features

Smart Optimization

Multiple techniques: image recompression, resource cleanup, and structure optimization.

Quality Control

Light, medium, and aggressive levels for precise size-quality balance.

Private Processing

Documents optimized locally. No files uploaded to any server.

How To Optimize PDF Online for Free

Upload Your PDF

Drop your PDF into the tool. The file is analyzed locally on your device.

Choose Optimization Level

Select light, medium, or aggressive optimization. Preview the result.

Download Optimized PDF

Download the smaller, faster PDF. See the size savings summary.

Optimize PDF files for smaller size and better performance directly in your browser. Reduce file size by removing redundant data, optimizing image compression, removing unused resources, and cleaning the document structure. Different from basic compression, optimization applies multiple techniques tailored to your needs. Processing runs locally via WebAssembly.

Everything You Need in a Optimize PDF

Size Reduction

Multiple optimization techniques reduce file size significantly.

Three Levels

Light, medium, and aggressive for different quality requirements.

Image Optimization

Images recompressed with configurable quality for maximum savings.

Resource Cleanup

Unused fonts, objects, and duplicate resources removed.

Web Optimization

Output linearized for fast progressive loading on websites.

Local Processing

WebAssembly optimizes your PDF on-device. Documents stay private.

Frequently Asked Questions

Document Work Made Easy

Process your PDFs with our collection of free, privacy-first tools. No uploads to servers, no registration required. Everything runs directly in your browser.