Compress PDF file size online
Shrink your PDF to a smaller file size for exam uploads and email — free and entirely in your browser.
Best for scanned documents and image-heavy PDFs (the kind exam portals reject for size).
Compress in 3 simple steps
Pick a level
Light, Recommended or Strong compression.
Upload your PDF
Choose the PDF you want to shrink.
Download
See the before/after size and save the smaller PDF.
Why use this PDF compressor
Big savings
Scanned and image-heavy PDFs often shrink by 40–80%.
Adjustable
Choose how hard to compress to balance size and clarity.
Private
Compression runs in your browser; your file is never uploaded.
Beat upload limits
Get under the maximum size a form or email allows.
Free
No watermark and no sign-up.
Works with tools
Merge or convert first, then compress the final PDF.
Get your PDF under the upload limit
Exam portals, job applications and email attachments all enforce a maximum file size, and scanned documents easily blow past it. This tool compresses your PDF by re-encoding its pages, often cutting the size dramatically while keeping it readable — so a 5 MB scan can drop to a few hundred KB.
Choose Recommended for a balance of size and clarity, or Strong when you must hit a tight limit. The whole process runs in your browser, so your document is never uploaded. It works best on scanned and image-heavy PDFs, which are usually the ones that exceed size limits.
Frequently asked questions
How much can it reduce my PDF?
How do I compress a PDF to upload it on a form?
Are my files uploaded?
Why did my text PDF not shrink much?
Is it free?
Make any PDF upload-ready
Compress, merge and convert your documents — free and private.