Signature Size Checker Online
Upload a signature image to instantly see its file size in KB, pixel dimensions, format and aspect ratio.
Your signature is checked inside the browser and is not uploaded.
What the signature size checker shows
Online application forms commonly check more than one image property. This tool reads the actual file and reports the four details that matter most before a signature upload.
File size in KB
See the current storage size of the image and compare it with the maximum or range shown by your form.
Width and height in pixels
Check the exact pixel dimensions without opening an image editor or file-properties window.
Image format
Confirm whether the signature is JPG/JPEG, PNG or WebP before submitting it to a portal.
Aspect ratio
View the proportion between width and height, such as 7:3, to understand the shape of the signature image.
File size and dimensions are different
File size describes how much storage the image uses, usually in KB. Dimensions describe the image width and height in pixels. A signature can have the correct dimensions but still be too large in KB, or fit the KB limit while having the wrong width and height.
Need to correct the file?
Open the Signature Resizer to crop blank space, set exact dimensions, reduce the file size or convert the output format. The checker itself does not change the uploaded image.
Open Signature ResizerPopular signature tools
Frequently asked questions
How do I check my signature size in KB?
Upload the signature image. Its actual file size appears in KB in the result panel.
How do I check the width and height of a signature?
The checker reads the image and displays its exact width × height in pixels.
Does this tool upload or store my signature?
No. The image details are read inside your browser and the file is not sent to LevoTools for processing.
Does a correct result guarantee that a form will accept the signature?
No. Compare the reported values with the current instructions on the destination form. Portals may also check visual clarity, ink colour, cropping or other rules.