Signature & thumbprint guide · 15,000-byte maximum
Compress a photo, scanned signature or thumb impression to a maximum of 15,000 bytes in your browser. Check fine ink lines and the final dimensions before using the result.
JPG, PNG or WebP → at most 15.0 KB
Requirements differ by form and year. This tool checks a maximum file size; it does not guarantee acceptance or set exact dimensions.
| What to check | Before you compress | Before you upload |
|---|---|---|
| Signature or thumbprint | Crop unused margins in an image editor first, if your form permits | Inspect every ink stroke or ridge |
| Size range | Confirm that 15 KB is the allowed maximum | At most 15,000 bytes; check any minimum |
| Framing and format | Follow the current form instructions, not a universal preset | Verify pixels and JPEG/WebP acceptance |
Choose a supported static JPG, PNG or WebP file up to 15 MB and 24 megapixels. Animated images and PDF files are not supported.
Your browser tries quality and dimension settings within its processing limits. Time depends on the file and your device; a matching result is not guaranteed.
Download after checking the result against your destination’s file type, size and dimension requirements.
A GOOD FIT, NOT JUST A SMALL FILE
Use JPG when your form asks for a photograph in JPEG format. JPEG replaces transparent areas with white. Use WebP when the destination accepts it and you need a smaller file or transparency.
PNG is supported as an input. Downloads are JPEG or WebP; this tool does not export PNG or PDF.
Compression can soften details and reduce pixel dimensions. Check faces, letters and signature strokes in the comparison before downloading. File size in KB and image dimensions in pixels are different requirements.
For a strict 20 KB maximum, this site checks against 20,000 bytes. See why that differs from 20 KiB.
Supported inputs are static JPG, PNG or WebP files up to 15 MB and 24 megapixels. Before compression, the working image is limited to 12 megapixels; larger sources are reduced proportionally even if a generous byte limit is selected. The search may reduce dimensions further. Some images cannot reach the selected maximum within the time, attempt and minimum-dimension limits. The tool does not pad a smaller result to an exact size or enforce a minimum file size.
Select a supported static JPG, PNG or WebP, keep the 15 KB maximum and compare the result. The tool adjusts encoder quality and may reduce dimensions. A download is offered only when the output is at most 15,000 bytes; some images cannot reach the target.
Clarity is not guaranteed. Crop unused space and improve lighting or contrast in an image editor before compression if the form permits it. This tool does not crop, clean up ink or boost contrast. Zoom in to check thin strokes and thumbprint ridges.
Here 15 KB means a maximum of 15,000 bytes, not an exact padded file size. The result may be smaller. If your form also sets a minimum size, check it separately; 15 KiB is 15,360 bytes and exceeds this decimal limit.
Use the pixel dimensions and framing required by your specific form. There is no universal 15 KB signature shape. The compressor can reduce dimensions proportionally but does not set an exact width, height or DPI.
