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400×100 px · जेनेरिक सही (४:१)

Generic Signature (4:1) signature size

The standard 4:1 wide signature crop for any form that gives no exact spec. Use this when your portal only says 'upload signature'.

Make this signature now — free

Sizing and compression run in your browser — no upload, no sign-up.

Exact specifications

Dimensions (pixels)
400 × 100 px
File format
JPEG (.jpg)
File size
up to 100 KB

How to make a Generic Signature (4:1) signature

  1. 1

    Open the Exam Signature Resizer

    Open the free Exam Signature Resizer on Tools.Town and select the "Generic Signature (4:1)" preset.

  2. 2

    Photograph your signature

    Sign with a black pen on plain white paper and photograph it from straight above in good, even light.

  3. 3

    Crop and clean

    Crop tightly around the signature inside the locked aspect frame, then toggle 'Clean background' to turn the paper pure white and darken the ink.

  4. 4

    Get the exact-spec file

    The tool resizes the signature to exactly 400×100 px and compresses the JPG to up to 100 KB, showing the actual output size before download.

Frequently Asked Questions

What is the exact Generic Signature (4:1) signature size?
400 × 100 pixels, saved as a JPG up to 100 KB. The standard 4:1 wide signature crop for any form that gives no exact spec. Use this when your portal only says 'upload signature'.
How do I make a 400×100 px signature image at home?
Sign with a black pen on plain white paper, photograph it from straight above, and use the free Exam Signature Resizer: pick the "Generic Signature (4:1)" preset, crop in the locked frame, clean the background with one toggle, and download the exact-spec JPG. Everything runs in your browser — the signature is never uploaded.
Why does my signature upload keep getting rejected?
Portals enforce hard limits invisibly: a file outside the up to 100 KB band or a few pixels off 400×100 px is rejected automatically, and grey paper backgrounds inflate the file size. The tool whitens the background, compresses into the band, and shows the measured pixels and KB before you download.
Does the signature have to be in black ink?
Black ballpoint or gel pen on plain white paper is the safe default — several portals explicitly require black ink, and dark strokes survive the tiny output size best. The tool's cleanup pass darkens the ink toward pure black and turns the paper pure white.
Is my signature uploaded to a server?
No. Cropping, background cleaning, resizing and compression all run in your browser — the image never leaves your device, and no account is needed. That matters for a signature, which is exactly the kind of image you don't want stored on someone's server.

Get your Generic Signature (4:1) signature in under a minute

Exact 400×100 px, compressed to up to 100 KB, with one-click background cleaning.

Open Exam Signature Resizer

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