Signature resizer
Photograph your signature. It is cropped to the ink, cleaned to white, and fitted to the form's size.
JPG · PNG · WEBP · HEIC → JPG
Sent to server: 0 B
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- Requests that could carry data
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- Engine downloads (code, models)
- 0
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Counted with the browser's Performance API during the last job. It sees every request the page makes, but not what is inside them, so anything that is not a static download is counted above.
To check yourself: open DevTools → Network, clear the list, run the tool, and inspect each request. None will contain your file. You can also switch to offline after the page loads; tools whose engine is already downloaded keep working.
Drop image here
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JPG · PNG · WEBP · HEIC → JPG
Sign on plain white paper in dark ink, then photograph or scan it.
Turn a photo of your signature into a clean upload
Forms that ask for a scanned signature usually want a small JPG with dark ink on white paper, at a set pixel size and inside a KB range. A phone photo of a signature has grey paper, shadows and far too many pixels. Signature resizer finds the ink, crops tightly around it, turns the paper white and the strokes darker, and fits the result to the form's size and file limits.
- The signature box on exam, job, scholarship and admission applications.
- Bank, KYC or account-opening forms that want the signature as a separate image.
- A clean signature image to place on documents with Sign PDF.
Form preset, crop, ink threshold and file size
Choose the form; presets include general sizes for job, bank and application portals (600 × 200 px under 100 KB, a small 300 × 100 px under 50 KB, and a larger one for signing documents) plus the SSC, UPSC, IBPS, NEET and Lok Sewa signature sizes, each with its pixel size and KB range. If your form isn't listed, pick a preset with a similar shape and set the maximum file size yourself. Optionally drag the frame to leave out anything that isn't your signature, such as a printed line or the edge of the page; the ink inside is found and cropped either way. The ink threshold decides which pixels count as ink: raise it to keep faint strokes, lower it to clean up grey paper. Maximum file size overrides the preset when the notice gives a different limit.
- Sign with a black or dark blue pen on plain white paper, a little larger than usual.
- Photograph it in daylight, straight on, without your own shadow over the page.
- UPSC asks for three signatures, one below the other; photograph the whole block.
Make sure every stroke survived
If no clear ink is found, the whole picture is used and the notes tell you; sign again with a darker pen on whiter paper. Thin or light strokes can break up when the paper is whitened, so zoom in and raise the threshold if parts of letters disappear. Size rules change between notices, so check the current one before uploading.
- Zoom in: strokes should be joined and the paper pure white.
- Check the KB size in the result is inside the form's range.
- Keep the original photo in case the form asks for another size.
Signature resizer: questions
How should I photograph my signature?
Sign in black or dark blue ink on plain white paper, a little larger than usual. Photograph it in daylight from straight above, without your shadow on the page. The tool crops to the ink automatically.
My signature looks broken or faint. What can I do?
Raise the ink threshold to keep lighter strokes. If that brings back grey paper, sign again with a darker pen; that fixes it better than any setting.
My form isn't in the list. Can I still use it?
Yes. Pick a preset with a similar shape and set the maximum file size from your form. If the form requires exact pixels, resize the result afterwards with Resize image.
Why is the background grey instead of white?
The threshold is too high for your paper. Lower it until the paper turns white, then check the strokes are still complete.
Is my signature uploaded?
No. It's processed in your browser. Upload the result only to the form that asked for it.