Reduce a PDF's file size so it's easier to email, upload, or share — no account needed.
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Instant client-side file compression
Large PDFs are a common headache — email attachment limits, slow uploads, or file storage caps[cite: 3]. This tool rebuilds your PDF's internal structure and strips unnecessary metadata to bring the size down, entirely inside your browser[cite: 3]. It works best on text-heavy documents with a lot of repeated structure; heavily image-based or already-optimized PDFs will shrink less, since true image recompression needs a dedicated server-side engine[cite: 3]. Either way, you'll see exactly how much smaller your file got before you download it[cite: 3].
Most commercial compression sites demand uploading sensitive files to remote servers, locking significant reductions behind paid paywalls, or restricting free users to watermarked downloads. Operating locally via WebAssembly and PDF-Lib ensures confidential financial records, agreements, and IDs never leave your device while delivering instantaneous processing without waiting queues.
Reduce document file sizes to fit comfortably under standard 20MB and 25MB corporate email attachment ceilings.
Optimize resumes, academic portfolios, and certificates for portals with strict 2MB or 5MB size limits.
Strip excess metadata bloat from multi-page scanned expense receipts and billing statements.
Downsize archived documents to minimize digital footprint on your hard drive and personal cloud drives.