Compress
Free Compress PDF Tools
Compress PDF files by up to 90% without losing quality. Our free compression tools use advanced browser-based algorithms to reduce file sizes for email attachments, web uploads, and storage optimization — all processed locally on your device.
Why compress your PDFs?
Large PDF files are one of the most common obstacles in everyday document workflows. Email providers cap attachments at 25 MB, job portals often enforce even stricter limits, and cloud storage fills up fast when every report is 10+ MB. Our Compress PDF tool solves this by shrinking file sizes by up to 90% — without visible quality loss.
Unlike other online compressors, PDF Shuttle processes your files entirely in your browser. That means sensitive financial documents, legal contracts, and personal files never leave your device. There are no uploads, no waiting for a server, and no risk of data exposure.
If you also need to change formats, try the PDF Converter to go from PDF to Word, Excel, or images. For AI-powered workflows, explore our AI PDF tools to summarize, translate, or chat with any document.
Compress PDF Tools — FAQ
Common questions about compress PDF tools.
PDF compression reduces file size by re-encoding images, removing duplicate data, stripping unnecessary metadata, and optimizing internal structures. Our tool uses WebAssembly to run this entirely in your browser.
Our default setting balances size and quality so most users see no visible difference. You can also choose a lighter compression for maximum fidelity, or aggressive compression for maximum size reduction.
No. There are no daily limits, no file caps, and no watermarks. Compress as many PDFs as you need, completely free.
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