PDFSizeFit
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Target size

Compress PDF to 100 KB

For visa, government, and ID-scan uploads with the strictest caps. Choose your PDF and the tool works down to 100 KB or less, then shows the measured size.

  • Runs in your browser
  • No upload or account
  • Measured result

Your file never leaves this device — everything happens locally in your browser.

Compressing more than one PDF? Try batch compression.

What to expect

What fits in 100 KB

A 100 KB limit is about as strict as PDF uploads get. You'll run into it on visa applications, government portals, and ID or passport-scan uploads that expect a single scanned page, not a full document.

Getting that small usually means re-encoding the images in your PDF at a fairly low quality. The tool tries several quality levels and keeps the highest one that still fits under 100 KB. It won't go below a set minimum, and if the file still doesn't fit at that point, you get the smallest version it made, clearly marked as a best effort.

This works best on a single scanned page or a short document. A long, mostly-text file has much less room to shrink and may not reach 100 KB at all. For that kind of file, a 500 KB or 1 MB target is more realistic.

  • One scanned page

    Usually fits

    A single page image has room to be re-encoded under 100 KB and stay legible. This is what most 100 KB limits expect.

  • A short text document

    Depends

    Text isn't re-encoded, only repacked. If embedded fonts already make the file much bigger than 100 KB, repacking alone may not get it there.

  • A multi-page scan

    Often tight

    Every page shares the same 100 KB. Five scanned pages leave about 20 KB each, and they'll look soft.

  • A long or photo-heavy document

    Often won't fit

    There's too much image data for 100 KB at a readable quality. A 500 KB or 1 MB target is more realistic, if the portal allows it.

How it works

How the tool gets to 100 KB

  1. Choose your PDF

    It opens in your browser, with the target already set to 100 KB. Nothing is uploaded.

  2. The tool works down to 100 KB

    It repacks the file and re-encodes its images, tries several quality levels, and keeps the highest one that fits. For image-heavy files that still don't fit, pages can be turned into images as a last resort, and the result screen says when that happened.

  3. Check the result, then download

    You see the measured size of the file you'll get. If 100 KB wasn't reachable, you get the smallest version the tool made, marked as a best effort.

Still too big?

If it won't get under 100 KB

The result screen tells you when a target wasn't reached. These are the options that usually get a file through.

  • Upload the pages separately

    If the portal accepts more than one file, cut the PDF into single pages with Split PDF and compress each one.

  • Remove pages the portal doesn't need

    Delete blank pages, instructions, or duplicates in Organize PDF Pages, then compress again.

  • Scan it again at a lower setting

    If you made the scan yourself, a lower resolution or grayscale setting on the scanner leaves less image data to squeeze.

FAQ

Frequently asked questions

See all frequently asked questions
Will a scanned ID or passport page still be readable at 100 KB?

Usually. A single scanned page normally has plenty of room to get under 100 KB and stay legible. A multi-page scan or a very high-resolution original is more likely to need a larger target. Either way, open the result and check it before you upload it.

My visa portal says "under 100 KB" — will this guarantee that?

The tool measures the file it actually produced and only reports success when that file is 100 KB or smaller. If it can't get there, it says so and shows you the smallest size it reached.

Why is 100 KB so much harder to hit than 500 KB or 1 MB?

A smaller target means lower image quality, and past a certain point a scanned page starts to look blotchy. The tool keeps the highest quality that fits your target, not the smallest file it can make.