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Signature Resizer

Resize scanned or photographed signatures to the required pixel or physical dimensions, set DPI and a KB limit, and export as JPG, PNG or WEBP. Processing stays in your browser.

Runs in your browser Nothing uploaded No limits Free, no sign up

Signature

Add a signature image or scan. Transparent output preserves transparency already present in the source; it does not erase a white paper background.

Drop your signature here

or click to browse · JPG, PNG or WEBP

For best results, use a dark signature on a plain, evenly lit background. A white paper background remains unless it was already transparent in the source.

No signature selected
Processed on your device
Preset sizes are common starting points, not universal application standards. Always check the exact dimensions, file format, DPI and file-size limit requested by the form you are submitting.

How to resize a signature

  • Upload a clear scan or photograph of your handwritten signature.
  • Choose a common signature size or enter the exact pixel width and height required by the application.
  • Set the requested DPI, output format and maximum file size in KB.
  • Use Fit inside frame to keep the complete signature visible, or Fill frame and crop when the application requires a filled frame.
  • Adjust zoom and position, create the image, check the output details and download it.

Preparing a clean signature image

  • Write with a dark pen on plain, evenly lit white paper and capture it without shadows.
  • Crop the source image close to the signature before uploading, or use the positioning controls to frame it.
  • PNG is useful when the source already has a transparent background. JPG is often smaller for a white-paper scan.
Are my signature images uploaded?

No. Image decoding, resizing, compression and file generation happen in your browser. The selected signature image is not sent to our server.

Will the tool remove the white paper background?

No. Transparent output preserves transparency already present in the source image; it does not erase a white or coloured paper background. Use a transparent source if the application requires a transparent signature.

Can I create an exact file size in KB?

The entered KB value is a maximum. JPG and WEBP quality is adjusted to approach the limit. PNG is lossless and may remain above a very small target at the requested dimensions.

Does DPI change my custom pixel dimensions?

For physical-size presets, pixel dimensions are calculated using the selected DPI. For custom pixel dimensions, changing DPI updates the resolution metadata while keeping the entered width and height.

Which signature dimensions should I use?

The 4 × 2 cm, 5 × 2 cm and 6 × 2 cm choices are common starting presets only. Always follow the exact width, height, file-size and format requirements shown by the application.

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