Compress PDF to 300 KB

Compress any PDF toward 300 KB: free, instant, and 100% private in your browser.

Target size:300 KB

Drop your PDF here

Will be compressed toward 300 KB (up to 300 MB)

Select PDF

100% Private

PDFs are processed in your browser. Nothing is uploaded.

As small as possible

We get as close to 300 KB as the file allows, and we tell you the exact result.

No Watermarks

Free forever, no signup, no daily limits.

Why 300 KB?

300 KB is a comfortable middle ground for document uploads. Some upload portals and forms set a 300 KB limit, small enough to stay within tight caps, large enough to hold a couple of readable scanned pages. Because 300 KB leaves a little more room than a 100 KB or 200 KB limit, scans usually keep more detail at this target. Our tool renders the pages, tunes the quality to fit 300 KB as closely as possible, and shows you the exact final size. Most everyday documents reach 300 KB easily. A long, photo-heavy PDF might need more headroom. If so, we tell you the smallest size we could achieve. All processing is local; your file is never uploaded.

How do I reduce a PDF to 300 KB online for free?

Upload your PDF and the tool re-renders the pages and tunes the quality to land as close to 300 KB as it can, then shows you the exact final size (if a long or photo-heavy file can't reach 300 KB, you get the smallest version it can make instead of a rejection). It runs entirely in your browser so the file is never uploaded, and reaching very small sizes turns pages into images, so text stops being selectable.

Frequently Asked Questions

Will every PDF fit in 300 KB?

Most everyday documents will. A long, image-heavy scan may not (in that case we hand you the smallest version we can make and report its real size instead of failing).

Does compressing to 300 KB hurt quality?

There's a little quality loss because pages are re-rendered, but 300 KB is usually enough to keep a scan clearly legible. For a sharper result, try a larger target like 500 KB or 1 MB. Compress to 1 MB

Is the text still selectable?

No. Hitting a small size means rendering pages to images. Use the full Compress PDF tool if you need selectable text or OCR. Open Compress PDF

Is it free with no watermark?

Yes, free forever, no signup, no watermark, no limits.

Do you upload my PDF anywhere?

No. Everything happens in your browser; the file stays on your device.