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Error: “Signature file size should be between 10 KB and 20 KB.”
The signature file must be 10–20 KB. A plain signature on white paper often compresses below 10 KB, which is rejected too — the tool keeps it above the minimum. 140×60 px is the most common signature size.
Fix it in 3 steps
- Upload your signature in the tool above (photo, scan or screenshot — JPG, PNG or HEIC).
- Adjust the crop. The tool saves exactly 140×60 px within 10–20 KB.
- Download and upload it to the form again. If your notification gives different numbers, change the size and KB in the tool.
FAQs
What does “Signature file size should be between 10 KB and 20 KB.” mean?
The signature file must be 10–20 KB. A plain signature on white paper often compresses below 10 KB, which is rejected too — the tool keeps it above the minimum. 140×60 px is the most common signature size.
How do I fix it?
Use the tool on this page: it is preset to 140×60 px, 10–20 KB, JPG, which passes this check. Upload your file, adjust the crop and download.
Why does the form still reject my file?
Re-check the exact numbers in your notification (width × height and KB). Portals also reject PNG/HEIC files renamed to .jpg — this tool always saves a real JPG. More upload errors explained.
Other upload errors
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