Resize Thumb Impression for Exam Forms
Upload a scanned thumb impression and get it back at 140 × 60 pixels, under 20 KB — the specification used by SSC, IBPS, SBI and most state recruitment portals.
Finding the best quality that fits…
- Original
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- Result
- —
- Reduction
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- Dimensions
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How to use this tool
- Select your file, drag it onto the box above, or paste it from your clipboard.
- Processing starts automatically — there is nothing to configure.
- Check the result panel, which shows the original size, the final size and the output dimensions.
- Click Download to save it.
The 140 × 60 pixel box is close to a 7:3 ratio. Cropping your scan to roughly that shape before uploading gives a much cleaner result than letting a square image be squeezed into it.
The specification
| Dimensions | 140 × 60 px |
|---|---|
| File size | Under 20 KB |
| Format | JPG / JPEG |
| Ink | Blue or black stamp pad ink on plain white paper |
| Style | Left thumb unless the form states otherwise |
Why uploads get rejected
Meeting the size is only part of it. These are the failures that actually come up:
- The scan includes a large white margin, so the mark itself ends up tiny inside the 140 × 60 box. Crop tight first.
- The impression is smudged or too faint. Press once, firmly, without sliding.
- The background is grey because it was photographed under a lamp rather than scanned. Portals check for a clean white background.
- The file is below the minimum in the permitted range. A file compressed to 3 KB when the rule says 10–20 KB fails just as surely as one at 40 KB.
How it works
Most compressors pick a fixed quality level and hope for the best, which is why they either overshoot the limit or land far below it and throw away detail you did not need to lose.
This tool runs a binary search instead. It encodes your image at a mid-range quality, measures the resulting file, then narrows the range — higher if there is room, lower if it is over — repeating seven times. It keeps the largest result that still fits. If the lowest quality is still too big, it reduces the pixel dimensions and searches again.
All of it runs on your own device using the browser's canvas API. Nothing is transmitted.
Who uses this
Nearly every Indian competitive exam — SSC, IBPS, SBI, RRB, the state PSCs — asks for a scanned thumb impression in a 140 × 60 pixel box within a narrow file-size range. One correctly prepared file usually serves an entire application season.
Frequently asked questions
Why 140 × 60 pixels?
It is the box size published by IBPS, and most other commissions adopted the same figure. It works out to roughly a 7:3 landscape ratio.
How should I capture it?
Press your left thumb once on a stamp pad and then onto plain white paper. Scan at 200–300 dpi if you can. A phone photo works if lighting is even and no shadow falls across the paper. Crop tightly before uploading here.
It looks faint after resizing. What went wrong?
Usually the original had thin strokes and a lot of surrounding white space. Crop closer, and if the ink was light, do it again more firmly — detail lost at 140 × 60 pixels cannot be recovered.
Does my exam accept this size?
Most do, but check your notification. Each exam page on this site lists the specific published requirement alongside its source.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device. Your file is never transmitted and never stored by us. You can confirm this by opening your browser’s Network tab while you use the tool — you will see no upload request.
Is there a limit on how many files I can process?
No. There is no daily cap, no account, and no watermark. Because the work happens on your device rather than our servers, there is nothing for us to ration.
How do I resize my photo for the Resize Thumb Impression for Exam Forms form online?
Upload it to the tool at the top of this page. It is already set to the Resize Thumb Impression for Exam Forms specification, so there is nothing to configure — select your photo and download the result. Everything happens on your device, so it works even on a slow connection near the application deadline.
Can I do this on a phone?
Yes. The tool runs in a mobile browser exactly as it does on a desktop, and you can select a photo straight from your camera roll. Most candidates complete their application on a phone, so it is built to work that way.
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Your files stay on your device. This tool runs entirely in your browser. No file is uploaded, transmitted, or stored. You can verify this by opening your browser's Network tab while using the tool.
Disclaimer. Specifications published by exam boards, governments and platforms change without notice. We verify and date every specification on this site, but you should always confirm against the official source before submitting an application. See our full disclaimer.