Signature Resizer Online

One job, done exactly: turn the photo of your signature into a file of exactly 140 × 60 pixels that sits inside the KB band your form demands — 10–20 KB for SSC and IBPS, or under 10 KB / under 50 KB for portals that set only a ceiling. Crop with the locked frame, press one button, download. Free, no sign-up, and your signature never leaves your device.

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Drag & drop your signature photo here

or click to choose a file — JPG, PNG or WebP (you can also paste an image)

🔒 Your file never leaves your device — resizing happens in your browser.

Know your exact target already? Use a one-click version of this tool: Resize signature to 20KB · Resize signature to 10KB

Signature specifications

SSC and IBPS publish exact signature specifications, and the presets above apply them for you. Other exams and portals set their own rules — sometimes only a KB ceiling — so always read the upload line in your notification before choosing a preset.

How to use

1. Sign and photograph. Sign with a dark pen on plain white paper and photograph it straight-on in good light (details in the guide below).
2. Add your signature photo. Drag & drop it into the tool, tap to select it, or paste it from your clipboard.
3. Crop with the locked frame. The frame is locked to 140 × 60 proportions — drag it over your signature and pull the corner handle so the frame hugs the strokes, or tap Auto center-crop.
4. Pick your preset and download. SSC / IBPS band, an under-10 KB or under-50 KB ceiling, or your own Custom numbers. The result panel confirms the exact pixels and size before you download.

How to get a good signature scan

The resize is the easy part — most failed signature uploads were lost at the photograph. Four habits make yours pass first time:

• Dark pen, plain white paper. Sign with a dark blue or black pen on a clean, unlined sheet. Ruled lines get baked into the image and look like part of the signature.
• Sign a little bigger than usual. Your signature will be reduced to 140 × 60 pixels, so bold, slightly larger strokes survive the shrink; thin, faint ones can break up or vanish.
• Good light, no shadow. Photograph in bright, even light — daylight near a window is ideal — and keep your phone and your own shadow off the paper. A shadow turns half the background grey, the classic cause of “unclear signature” rejections.
• Crop tightly. In the tool, frame just the signature with a small white margin. The tighter the crop, the larger and clearer the strokes are in the final 140 × 60 file.

Why signatures get rejected

A signature upload has to pass the same three software checks as a photo — JPG format, a file size inside the stated limits, and the exact pixel dimensions — and it fails them in its own particular ways. The dimensions catch people out first: 140 × 60 is a wide, short strip, while a phone photo is a tall rectangle, so a signature that has simply been “compressed” still has completely the wrong shape and is refused no matter how small the file is. That is why this tool crops to the shape first and only then worries about kilobytes.

The size limits cut in both directions. Shrink a signature too enthusiastically and heavy JPEG compression smears the strokes into grey mush — and a signature that no longer matches the one you sign on the exam-day attendance sheet can cause trouble at verification, long after the upload was accepted. Compress too little, or photograph in such detail that the file stays heavy, and you break the ceiling. And as the next section explains, some bands punish you for making the file too small as well. Add the everyday faults — a shadow across the paper, a bluish or grey background instead of white, strokes so pale they fade at small sizes — and it is easy to see why the signature upload, the smallest file on the form, causes a disproportionate share of rejected applications.

The KB band has a floor, not just a ceiling

SSC and IBPS do not ask for “under 20 KB”; they ask for a signature between 10 KB and 20 KB. A clean signature — dark strokes, white paper, nothing else in the frame — is a very simple image, and at 140 × 60 pixels it commonly encodes to just 4–7 KB at the highest JPEG quality. That file is, paradoxically, too good: the portal rejects it for falling below the minimum. When that happens here, the tool appends empty JPEG comment segments — a legal, invisible part of the file format that viewers and decoders simply skip — until the file size rises into the band. The picture is untouched; the file just carries a little ballast, and the result panel tells you plainly when this has been done.

How this tool works

When you press Make my signature, the tool draws exactly the region inside your crop frame onto a fresh canvas of precisely 140 × 60 pixels (or your Custom size), laid over a white background, and encodes it as a JPEG. It searches for the highest quality setting that still fits under the maximum KB, then checks the minimum: if one applies and the file is below it, padding brings it into the band as described above. The result panel states the exact dimensions, the exact size and a plain confirmation that you are inside the band. Everything runs in your browser — nothing is uploaded, which is exactly how a signature, of all images, should be handled.

Frequently asked questions

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