Signature uploads follow the same strict rules as photos — exact dimensions, a tight KB range, black ink on white background — but get less attention and fail just as often. A photographed or scanned signature is rarely close to the target size without adjustment.
or drop it anywhere in this box
JPG, PNG, WebP · processed locally on your device
Custom target, 2–10240 KB
Match the portal's rule
Converting PNG with transparency to JPG fills the background white.
One tap applies the exact dimensions, format, and file-size rule for the form. Verified presets are checked against the official source.
0 KB— KB
ORIGINAL—
RESULT—
Everything runs in your browser using the HTML5 Canvas — your photo is never uploaded to any server.
AD SLOT — BELOW TOOL
Getting a clean signature scan first
Before resizing, the source matters: sign in black or dark blue ink on plain white paper, photograph it in good even light with no shadows, and crop tight to the signature itself before uploading here — a signature surrounded by excess white paper wastes the space the compression needs.
Common signature specs
India's SSC exams typically require 6×2cm at 300 DPI, 10–20KB. UPSC asks for roughly 350–500px width, 20–100KB, without a fixed physical size. Each form states its own numbers — apply the matching preset if we've verified one for your exact portal, or use the Dimensions and Exact KB tabs together for anything else.
Frequently asked questions
Why is my signature file rejected even though it's the right KB?
Check dimensions separately — many forms specify both a physical size and a KB range, and a correctly-sized-in-KB file with wrong pixel dimensions still fails.
Should I sign in black or blue ink?
Black is the safest default unless a form specifies otherwise — it scans with more consistent contrast than blue.