PDF compression
Compress a PDF to 500 KB
Small enough to send, clear enough to read. The best first try when there’s no super-strict cap.
Drag & drop your PDF here
or click to browse
What you get at 500 KB
Half a megabyte is roomy compared to 100 or 200 KB. A typed report that started at several megabytes usually lands here with no visible change, and even a couple of scanned pages often fit comfortably. The tool can afford to be gentle: it tries a light setting first and usually doesn’t need to push harder.
That’s why many people start here. If a portal says “up to 1 MB” or an email just needs to stop bouncing, 500 KB is often the good balance between “passes the check” and “looks like the original.”
When 500 KB is the right choice: and when it isn’t
Use this when a site allows 500 KB, 1 MB, or 2 MB: or when there’s no hard number and you just need a PDF that’s easy to send. For example, you’re attaching a 7 MB scanned agreement to an email and keep getting “delivery failed.” A 500 KB copy will go through to most inboxes, including stricter office servers, and still print fine.
Don’t use it where the form explicitly says 200 KB or 100 KB. A 480 KB file that looks perfect will still be rejected there, even though the content is fine. Match the number the form checks.
How it works
- Drop the original in. No need to tidy it up first.
- Pick 500 KB and wait a moment. The tool tries the lightest compression first and only steps up if the file is still too big, so you keep the best quality that still fits.
- Zoom to 150% once. At 500 KB you usually don’t need a pixel hunt: but a quick glance at small print confirms you’re safe. Then download with a clear name like “Agreement_500KB.pdf”.
A couple of honest notes
If your PDF is already under 500 KB, this won’t make it bigger.
It’ll just come back about the same size, maybe a touch smaller after duplicate data is cleaned up. You can skip compression in that case.
A very long colour scan may still sit above 500 KB
A 30-page colour scan at full resolution has simply a lot of pixels. It will still shrink a lot, but may need rescanning a few heavy pages in grayscale, or splitting the document, to sit comfortably under 500 KB. See why scanned PDFs are so large.
What it does to how your PDF looks
Very little. Because the limit is generous, the tool can keep JPEG quality higher, so text stays exactly as it was and photos keep most of their texture. For on-screen reading and normal office printing, most people can’t tell the difference without comparing side by side. That’s the point of starting here when you have the room.
Private, and works on your phone too
Same page on desktop and mobile: pick the PDF from Files on iPhone or Downloads/Drive on Android. No upload means no server copy afterwards. For a contract you’re emailing, that local-only step feels more appropriate than trusting a “we delete after 1 hour” promise.
Frequently asked questions
Is 500 KB enough for most portals?
Often, yes. Many forms allow up to 1 MB or 2 MB. Check the small print under the upload box: if it says “up to 500 KB,” this page is the exact fit. If it says “under 200 KB,” use the 200 KB tool instead.
Will email treat 500 KB as “small”?
Yes. A 500 KB attachment is tiny for Gmail or Outlook’s limits and usually fine even for stricter work servers. You can attach a few in one message without pushing the total over the line.