When you need an image under 100 KB
A 100 KB cap often appears where a form wants a document rather than a face: proof of address, certificates, mark sheets, ID cards or receipts photographed with a phone. Government, education, visa and job portals use it, and so do some insurance and banking upload pages. Each one sets its own rules, so read the form instructions for format and dimensions too.
Outside of forms, 100 KB is a practical budget for web images. Blog photos, online shop listings and newsletter pictures load quickly at this size, which helps visitors on slow mobile data.
Email is another case. Many people attach a dozen phone photos and hit the size limit of their mail service. Bringing each picture down to around 100 KB lets a whole set travel in one message and open quickly on the other side.
Online sellers benefit too. Listing pages with many light photos feel faster, and buyers can still zoom into the product.
Compress image to 100KB and keep documents readable
Text is the first thing to suffer when a scan is squeezed too hard. A little preparation keeps it crisp:
- Shoot straight from above in daylight, with the page flat and filling the frame.
- Crop to the paper edges using Crop Image. Table and floor around the page only waste bytes.
- Compress to 100 KB and zoom into the result to check small print.
| Content | Suggested output |
|---|---|
| Document photo or scan | JPG |
| Photo for a website | WebP or JPG |
| Screenshot with text | PNG or JPG |
Does the form want a PDF instead of an image? Turn the picture into a document with JPG to PDF, then shrink it with Compress PDF to 100 KB.
Shadows and uneven light turn white paper gray and blotchy, which costs bytes. Good, even light is worth more than any setting.
