Compress PDF Online
Reduce PDF file size for easier sharing and uploading — see the size drop before you download.
Processing…
Works with files up to roughly 100 MB, depending on your device's memory.
Large PDFs are slow to email and often get rejected by upload forms with size limits. Compress PDF shrinks your file directly in your browser by re-encoding the images inside it at a lower, still-legible quality, while keeping the same page count and layout. Choose a compression level — light, recommended or strong — and the tool shows you the original size, the new size, and the percentage saved before you download. Compression works best on scanned documents and PDFs full of photos, where the image data dominates the file size. For PDFs that are mostly selectable text, the tool will warn you if compressing would actually increase the size or turn the text into an image, so you can decide whether it's worth it. As always, the whole process runs locally — your PDF is never uploaded to a server.
How it works
Upload your file
Drag and drop, or click to choose a file from your device.
Choose your options
Set the options for this tool — most tools work great with the defaults.
Download your PDF
Get your result instantly, processed right in your browser.
Frequently asked questions
How much can compression reduce my PDF size?
It depends on the content — scanned or image-heavy PDFs can often shrink by 50-90%, while text-only PDFs compress much less.
Can I compress a PDF without losing quality?
The "Light" setting keeps visual quality very close to the original while still trimming size. Higher compression trades some image quality for a smaller file.
Will compressing turn my text into an image?
For text-heavy PDFs, the tool warns you first — compression is best suited to scanned or image-based documents.
Is my PDF uploaded to a server to be compressed?
No, compression is done entirely in your browser using JavaScript.
Can I choose the compression level?
Yes, pick between Light, Recommended and Strong before running the compression.