FitFileSize

Free · No sign-up

Compress a PDF to 100 KB

Exam and admission forms often cap certificates and ID scans at 100 KB. Scanned pages are mostly image data, so they usually get there with text still readable.

Drop your file here

or choose a file · PDF, JPG, PNG, WebP, TIFF or BMP

Your upload limit
  • Deleted automatically
  • Free, no watermark
  • Quality kept where possible

Getting a PDF under 100 KB

100 KB is tight, but it depends on what is in the file. A PDF made straight from a document, exported from Word or a web form, is mostly text, and text takes almost no space. Those usually fit after the lossless pass alone. Scanned pages are photos of paper, and those are what have to shrink.

For scans we lower the resolution of the page images one step at a time, down to 50 dpi at the lowest setting, and stop at the first step that fits. Anything drawn as real text stays sharp at every step; only images lose detail.

Tips

  • Scan one page per file if the form allows it. Every scanned page adds to the size.
  • Scan in grayscale or black and white when color does not matter. It compresses far better than color.
  • Crop the scan to the edge of the document. A strip of scanner lid still costs bytes.

How it works

  1. 1

    Drop your file

    A PDF or an image. It goes over an encrypted connection and nowhere else.

  2. 2

    Pick your limit

    Choose the size the form asks for. We start with a cleanup that changes nothing you can see.

  3. 3

    Download it

    If it needs more, we find the gentlest quality setting that still fits, and delete everything soon after.

Questions

Is it free?

Yes. There is no sign-up and no watermark.

What happens to my file?

It is processed on our server and deleted automatically: the original 5 minutes after the run finishes, the compressed file after 10. A file you upload but never compress is deleted within 30 minutes. You can also delete everything right away with Delete now.

Will it look worse?

We try a lossless cleanup first, which does not change how the file looks. Only if that is not enough do we lower image quality, and we pick the gentlest setting that still fits your size.

What if my file cannot get that small?

You get the smallest version we could make and a clear note saying so, instead of a file that silently misses the limit.

Why does the size page aim a little under its limit?

Some sites count a kilobyte as 1000 bytes and others as 1024. We aim under the stricter one, so a 200 KB page aims for 200,000 bytes and the file passes either way.

Common size limits