Should a certificate scan be 100KB or larger?

If the portal allows it, larger is safer for documents because verifiers need to read the text. 100KB is the floor; going to 200 or 300KB when the ceiling permits usually looks better on screen.

My scanner app saves at 40KB. How do I stop that?

Most scanner apps have a quality or resolution setting buried in preferences. Raise it for future scans, and use this tool to bring the copy you already have up to 100KB now.

Does 100KB guarantee my document is readable?

No. Byte count and legibility are separate things. Open the file at full zoom and check the text yourself before uploading, especially for handwritten entries.

Increase JPG Size to 100KB

100KB is the standard floor for scanned documents, certificates and higher-resolution photographs.

Drag & drop your image here

JPG, PNG or WebP — up to 20MB

Your images never leave your device

Why forms ask for 100KB

At 100KB you leave signature territory and enter document territory. Boards ask for it when a human will actually read the content of the image — a marksheet, a caste or income certificate, a domicile proof — rather than just glance at a face. A file smaller than this is usually a sign that a scanner app crushed the page until the printed text went soft.

University admission portals also lean on 100KB for photographs, because their forms tend to be filled on desktops with better scans available. If your camera photo is landing near 60 or 70KB, the increase to 100KB is small and the re-encode alone often gets you most of the way there before any padding is needed.

Enter 100 and you get 102,400 bytes exactly. If the instruction says "between 100KB and 200KB", aim for around 130 so a rounding difference in either direction still leaves you inside the range.

Where the 100KB rule shows up

Form or portal	Stated requirement
University admission document upload	100KB – 500KB
Caste / income certificate scan	minimum 100KB commonly
Bank KYC document portals	100KB – 2MB

Requirements change between cycles, so confirm the figure on your own instruction sheet before uploading. Your JPG is processed inside your browser and never sent to a server.

Other sizes

Frequently asked questions

Should a certificate scan be 100KB or larger?: If the portal allows it, larger is safer for documents because verifiers need to read the text. 100KB is the floor; going to 200 or 300KB when the ceiling permits usually looks better on screen.
My scanner app saves at 40KB. How do I stop that?: Most scanner apps have a quality or resolution setting buried in preferences. Raise it for future scans, and use this tool to bring the copy you already have up to 100KB now.
Does 100KB guarantee my document is readable?: No. Byte count and legibility are separate things. Open the file at full zoom and check the text yourself before uploading, especially for handwritten entries.