Compress PDF to 100 KB,
right in your browser.

100KB is a small budget for a PDF. It is usually realistic for one to three pages of mostly typed text, or for a single scanned page at modest resolution. A 20-page scan, or several full-colour phone photos, will rarely get under 100KB while staying readable.

If your file is long, check whether the form really needs every page. Use the split tool to keep only the pages asked for, then compress. Fewer pages is the easiest way to reach a small target.

Tight limits like this are common on older online application forms and some registration portals, often for supporting documents such as a certificate, a declaration or a single proof page. Always read the limit on the form itself, because rules differ and change.

The tool first tries the text-keeping mode. It re-saves the photos inside the PDF at lower quality and lower resolution, one step at a time, while your text stays selectable. If that is enough, you get a file at or under 100KB.

If it is not enough, the tool tells you and offers Strong mode, which turns every page into an image. Strong usually gets much smaller, but text can no longer be selected and links or form fields are lost. You decide whether to use it. If even Strong cannot reach 100KB, the tool says so and gives you the smallest version it made.

Scan in black and white or grayscale rather than colour. Crop scans to the page edges so there is no table or background around them. If you created the PDF from photos, resize the photos to about 1,000 to 1,200 pixels on the long side before converting. Zoom in on the result to make sure small print and signatures are still readable.