Why do phone photos of signatures get rejected on portals?

When you photograph a signature with a smartphone, room lighting casts grey shadows across the paper. These subtle gradients create JPEG noise that inflates file size above 20 KB or looks illegible to portal examiners.

How does the tool remove notebook lines and shadows?

The tool analyzes pixel luminance and samples the background paper tone. Light grey shadows and ruled page lines are pushed to pure 255 white, while pen strokes are sharpened and darkened.

Can I choose blue ink instead of black?

Yes. While SSC strictly mandates black ink, some entrance tests and bank forms allow blue ink. You can toggle between Deep Black and Royal Blue enhancement.

What if my signature file is still larger than 20 KB?

The tool automatically applies binary search JPEG compression to ensure the final output file strictly lands between 10 KB and 20 KB.

DESK // TOOL WORKSPACE · LOCAL ENGINE

CLIENT-SIDE BUFFER (0% CLOUD STORAGE)

Clean Signature Photo from Phone

Clean signature photo is an online tool that enhances handwritten signatures taken with a smartphone camera. It removes shadow gradients, paper lines, and yellow tint, converting the paper background to pure white while boosting ink to deep black. It then compresses the signature to meet exact 10 to 20 KB portal limits.

STEP 01

INTAKE / UPLOAD

STEP 02

ADJUST / PREVIEW

STEP 03

EXPORT / DOWNLOAD

INTAKE // DROP FILE ON DESK

Upload photo of handwritten signature

Removes mobile camera shadows, notebook paper lines, and yellow tint. Darkens ink to crisp black.

LOCAL BUFFER/0% SERVER TRANSMISSION

OFFICIAL BENCHMARK

Official Government Exam Signature Specifications

Source: Staff Selection Commission and Banking Boards (Verified October 2026)

Item Requirement	Required Value
SSC Signature Limit	400x200 px (4x2 cm), 10 KB to 20 KB, Black Ink
IBPS Signature Limit	140x60 px, 10 KB to 20 KB, White Paper Only
UPSC Signature Limit	Min 350x350 px, 20 KB to 300 KB
Paper Requirement	Unruled pure white paper, no lines or grids

VERIFIED ANSWERS