PDF Compression Online Tool

A fast online PDF compression tool for individuals and teams to reduce file size while preserving essential readability and structure.

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2,972+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

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About This Tool

This tool shrinks PDFs by applying configurable, domain-aware optimizations. It targets image downsampling, font subsetting, and metadata removal while preserving document readability and structure. Users upload a PDF and select optional controls such as compression level, DPI, and whether to subset fonts. The system then executes a staged pipeline that minimizes data overhead without compromising essential content. The output is a compressed PDF plus metrics on size before/after and the achieved compression ratio. The tool is suitable for students sharing lecture notes, professionals sending reports, and teams distributing manuals. It distinguishes between lossless and lossy modes and can preserve bookmarks and accessibility tags when possible. Batch processing enables multi-file workflows for archiving or distribution, improving bandwidth efficiency across organizations.

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How to Use

Upload the PDF to compress with optional batch mode if multiple files are involved.
Configure compression settings: choose level 1–5, DPI, font subsetting, and metadata removal.
Start compression and monitor progress; the tool applies a staged optimization pipeline.
Download the compressed PDF and review size and quality; re-run with different settings if needed.
For multiple files, repeat or enable batch mode to process all documents together.

Frequently Asked Questions

Find Quick Answers

What file types are supported?

Only PDF files are supported. The tool can process single PDFs or batches if batch mode is enabled. Password-protected files require removal of protection or supply of a password not handled by default.

Will quality always be preserved?

Quality preservation depends on content. Images and graphics are downsampled or compressed, which may affect image clarity. Font subsetting and metadata removal can reduce size with minimal impact on readability; a lossless option is available, but results vary by document.

Can I process several PDFs at once?

Yes. Batch mode enables multi-file processing, queuing, and simultaneous compression. Each file reports its own size before/after and compression ratio, and results can be downloaded individually or as a combined bundle.

Are metadata and accessibility features preserved?

Metadata removal is optional and can improve privacy and size. Accessibility tags and bookmarks are preserved where compatible with the chosen settings; complex features may require content-specific handling and could affect results.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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