Shrink Oversized PDFs
Reduce PDF file size by optimizing the document structure, removing redundant data, and streamlining content — turning a bloated PDF into an emailable file without visibly harming readability.
How Small Can You Go?
Text-only PDFs are already tiny and won't shrink much further. Scanned or image-heavy PDFs compress dramatically. Choose your level: Light keeps maximum quality, Strong gives the smallest file. Always keep the original until you have checked the compressed result.
Email Limits
Most email systems cap attachments at 20–25 MB. If your PDF still exceeds that after compression, try splitting it instead of degrading it further.
How PDF Compression Works
PDF compression shrinks file size with two techniques. Lossless compression rewrites the file's internal data more efficiently — identical visual quality, smaller file. Lossy compression reduces image resolution and quality inside the PDF, trading some sharpness for much smaller sizes. Text-heavy PDFs compress dramatically with lossless methods; scanned documents full of images need the lossy approach to see big savings.
Quality vs File Size Tradeoff
Choosing a compression level is a tradeoff. Maximum compression can cut a 50 MB scanned PDF to under 5 MB, but fine print and diagrams may turn fuzzy. For email attachments and web uploads, medium compression is the sweet spot — typically 60–80% smaller with no visible difference on screen. For archiving or professional printing, keep a high-quality original and compress only the copies you share.
Privacy — Files Stay in Your Browser
Our compressor processes your PDF entirely on your own device using JavaScript — the file is never uploaded to any server. That matters for sensitive documents: contracts, medical records, and financial statements never leave your computer, so there is nothing to intercept and nothing stored on our side.