Resize your signature to size & KB

Resize your signature to the exact dimensions and KB limit your exam form needs — free and entirely in your browser.

📁 Drop your signature image, or click to choose

Resize in 3 simple steps

1

Scan your signature

Sign on white paper with a dark pen and photograph or scan it.

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2

Set size & KB limit

Choose a preset or enter dimensions, and set the max KB (e.g. 20).

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3

Download

Save your signature, sized and within the limit, on a white background.

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Why use this signature resizer

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Exact dimensions

Resize to the precise width and height your application expects.

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KB ceiling

Automatically keeps the file under your form's size limit (often 10–20 KB).

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White background

Outputs a clean white-background JPG that exam portals accept.

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Private

Processed in your browser — your signature is never uploaded.

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Free & unlimited

No sign-up, no watermark, no limits.

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Part of the kit

Use alongside the photo and PDF tools to finish your whole application.

Get your signature accepted on the first try

Online exam applications check your signature against strict rules: a small pixel size, a tight file-size range (often 10–20 KB), and a plain background. A photo of your signature is almost always too big and the wrong shape, so the upload fails. This tool fixes both at once — it scales your signature to the dimensions you choose and squeezes it under your KB limit, on a clean white background.

Like all ToolsKaro utilities, it works entirely inside your browser. Your signature is never sent to a server, so it stays completely private. Pair it with our Image Compressor and Passport Photo Maker to prepare every part of your application in minutes.

Frequently asked questions

What size should a signature be for exam forms?
Most forms ask for a signature around 3×1 cm with a file size of 10–20 KB. Set the width, height and max KB to match your form's instructions, which are listed in the official notification.
How do I reduce my signature to 20 KB?
Upload a scan or photo of your signature, choose a size preset or enter custom dimensions, set the maximum KB (for example 20), and click Resize. The tool fits your signature within that size on a white background.
Will the white background be kept?
Yes — the signature is placed on a clean white background and saved as JPG, the format exam portals accept. For best results, sign with a dark pen on white paper before scanning or photographing it.
My signature scan has a grey or yellow tint — can I fix it?
Use a well-lit photo or a proper scan on white paper. The tool keeps a white background, but a clean source image gives the clearest result.
Is it free and private?
Yes — free, no sign-up, no watermark, and your signature is processed entirely in your browser and never uploaded.

Finish your application paperwork in minutes

Photo, signature and documents — sized, compressed and converted, all free.

Image CompressorPassport PhotoImage ResizerJPG to PDF