Resize, clean and compress a signature for online forms

Prepare one signature or a batch of signatures with auto-cropping, background cleanup, pixel or physical dimensions, and a target file-size limit. Your original files stay on your device.

1. Select your signature image(s)

Drop signature images here

JPG, PNG or WebP · up to 15 MB each · up to 20 files

Choose signature(s)

No signatures selected

0 selected0 B

2. File size and output

Match the form's exact upload constraints

Target maximum size Output format Background

3. Dimensions and cleanup

Crop the whitespace without distorting the signature

Dimension mode Unit Width Height DPI for mm/cm Keep aspect ratioUse this when the form gives a maximum box rather than an exact shape. Smart starting cropStarts with the signature framed tightly. You can always drag and zoom to change it.

4. Adjust framing

Position the complete signature inside the output box

Drag the image, pinch or zoom, and make sure no part of the signature is cut off. Your framing is used for the exported file.

Source preview

Prepared preview

Total input size

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Result

Not processed yet

Privacy

Signatures are processed locally in your browser; the source image does not need to be uploaded.

Signature image compressor for online forms

A signature upload usually has two separate constraints: a particular image shape or dimension and a maximum file size. This tool handles both while keeping the original file untouched.

Background cleanup

Transparent background is useful when the receiving document places the signature over a page. PNG is selected automatically because JPEG cannot preserve transparency. Always inspect the preview before submitting.

Batch signatures

Select several images with the same requirements and the tool processes them sequentially, then starts each result as an individual download.

Photo, signature and form image requirements →

Resize a signature for online forms

This browser tool covers signature resizer, resize signature to 20KB, signature to 50KB and similar online-form workflows. Crop and frame the signature, set the required dimensions and maximum file size, then inspect the result before submission.