Signature Image Resizer

Upload a signature photo, crop it to a bank/exam/form preset or a custom size, clean up the background, then download a sized JPEG or transparent PNG.

Use the Signature Image Resizer

Signature Image Resizer

Crop and resize a signature to a bank, exam, or form-ready size

Upload Signature

Output Size

140 x 60 px

140 x 60 px at 10-20 KB is the most common bank/exam spec. Check your specific form and switch preset if it differs.

Background Cleanup

File Size Target (JPEG only)

Sign with dark ink on plain paper and photograph it evenly lit, with no shadow across the signature, for the cleanest background cleanup result.

Upload a signature photo to start cropping

Summary

This tool crops and resizes a photographed or scanned signature to a size preset commonly requested by bank, exam, and government-form uploads, or to a custom pixel size you enter yourself. An optional background cleanup step whitens the paper around the ink, or makes it transparent for a PNG, and a file-size target adjusts JPEG quality to fit a min/max KB range. All cropping, resizing, and pixel cleanup run in your browser with the Canvas API; the image is never uploaded anywhere.

How it works

  1. Click the upload zone or drag a signature photo onto it.
  2. Pick a size preset (bank, exam, form block) or switch to Custom and enter a pixel width and height.
  3. Drag the crop box to reposition it, or drag a corner to resize while keeping the target ratio.
  4. Turn on background cleanup to whiten or remove the paper background around the ink.
  5. Set a target file size range in Output Settings.
  6. Click "Download Signature" to save a sized JPEG or transparent PNG.

Use cases

  • Resize a signature photo to the pixel size a bank account or debit card form requests.
  • Fit a signature scan under a specific KB cap for an exam or job application portal.
  • Clean a smartphone photo of a signature so the paper background does not show.
  • Produce a transparent-background signature PNG to place over a digital document.
  • Re-crop an existing signature scan to a different form's aspect ratio.
  • Standardize signature size in mm for a printed form at a chosen DPI.

Frequently Asked Questions

Last updated: 2026-09-09 · Reviewed by Nham Vu