Compress PDF Converter
Reduce a PDF's file size directly in your browser with Low, Medium, or High compression. See the real before-and-after size and reduction — free, nothing uploaded to a server.
Drop your file here
or choose a file
Supports PDF
Your files are processed locally in your browser and are not uploaded to our servers.
How to use the Compress PDF converter
- 1
Drop a PDF onto the upload area, or click it to choose one.
- 2
Choose a compression level — Low, Medium, or High.
- 3
Click "Compress PDF." The real original and compressed sizes are shown once it's done.
- 4
Download the compressed PDF.
Common uses
- Shrinking a scanned document so it fits an email attachment limit
- Reducing an image-heavy PDF before uploading it somewhere with a size cap
- Making a large report smaller to share or archive
Supported formats and limitations
Accepts PDF, up to one file at a time.
- "Low" re-saves the PDF's internal structure more efficiently — this keeps text selectable but only yields a modest reduction, and works best on already-mostly-optimized PDFs.
- "Medium" and "High" re-render every page as a compressed image to achieve a real, substantial size reduction — this is genuinely effective for image-heavy or scanned PDFs, but the output's text is no longer selectable or searchable, the same trade-off this site's Word to PDF converter already discloses.
- For a PDF that's already small or vector-only, compression may only produce a small reduction — this is shown honestly rather than reported as a bigger number than it is.
Frequently asked questions
No. Compression happens entirely in your browser — nothing is sent to a server.
With "Low," yes. With "Medium" or "High," no — those levels re-render each page as an image to achieve a much bigger size reduction, which means the text is no longer selectable or searchable.
You'll see the real before-and-after size either way — if a file is already small or optimized, the reduction may be modest, and that's shown honestly rather than faked.
Use "Low" if you need the text to stay selectable. Use "Medium" or "High" for the biggest size reduction, especially on scanned or image-heavy PDFs.
Yes, 40 MB.