Compress PDF — smaller file, no upload

Shrink oversized PDFs so they fit email attachments. Processed locally — your file never leaves your browser.

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Drop a PDF file here or click to browse

Compression level

Pages are re-rendered as optimized images. Text stays readable but can no longer be selected or searched, and links and form fields are removed. Scanned documents shrink the most.

How to compress a PDF

Drop your PDF into the box above.
Pick a compression level.
Click Compress PDF and download the smaller file.

Tip: compression works best on scanned or image-heavy PDFs. Files that are mostly text are often already small — if compressing would make yours bigger, LuniPDF tells you, keeps your original, and doesn't count the use.

📖 Step-by-step guide: Compress a PDF without sending it to a server