Where 100KB is the limit
Document fields ask for more room than photo fields because a scan has to stay readable, not just recognisable. Aadhaar and PAN copies, marksheets, caste and income certificates and bank passbook pages commonly sit in the 50KB to 100KB band on Indian portals.
Insurance claim uploads, visa application portals and online job boards use similar figures for supporting documents, which makes 100KB a safe default when a form mentions a limit but not an exact number.
Scanning tips that make 100KB easy
How you capture the document matters more than the compression itself. Place the page on a flat, evenly lit surface and fill the frame with it. A photo taken at an angle with a desk and hands in view spends kilobytes on things nobody needs to read.
Shadows are the other common problem. A curved page casts a gradient across the paper, and a JPG encoder treats that gradient as detail worth storing. Flattening the page or moving to softer light removes the problem at the source.
If your scanner app offers a document mode, use it. It straightens the page and flattens the background to plain white, which both improves readability and cuts the file size before compression even starts.
Choosing between 100KB and larger limits
- Printed text. 100KB is comfortable. Letters stay sharp at normal reading size.
- Handwriting. Consider 200KB if allowed, since pen strokes have fine edges that compression softens first.
- Photographs inside a document. An ID card with a photo on it benefits from the larger limit if the portal permits one.
- Multi page scans. Compress each page separately rather than combining them into one long image.
Frequently asked questions
Will text in a scanned document stay readable at 100KB?
In most cases yes. Documents are largely flat white, which compresses very efficiently, so 100KB leaves plenty of room for the letters themselves. Handwritten notes in light pencil are the usual exception.
Is 100KB the same as 0.1MB?
Close enough for any form. Strictly a megabyte is 1024 kilobytes, so 100KB is just under 0.1MB, and a portal that accepts 0.1MB will accept a 100KB file.
Can I compress several pages to 100KB each?
Yes, run them one at a time. Each page is processed separately, so a form asking for several documents under 100KB each can be handled in a few minutes.
The output came out much smaller than 100KB. Is that a problem?
No. The tool finds the best quality that fits under your limit, and some images simply compress well. A smaller file is accepted anywhere a 100KB file is.
Should I use 100KB for a passport photo?
Only if the form allows it. Many photo fields cap at 20KB or 50KB, so check the instructions first. Where 100KB is permitted it gives a noticeably cleaner result.
Does compressing remove the photo metadata?
Yes. Because the image is redrawn before being saved, camera details and location data are not carried over. For document uploads this is usually an advantage.