How do I resize a signature to exact pixels like 140 × 60?
Upload your signature above, choose a preset such as 140 × 60 px or type your own width and height, and click Download. This tool lets you resize signature by pixels without stretching your handwriting. It fits the signature inside the exact box with white padding, cleans the background, and keeps the file under your KB limit at the same time.
Why pixel size matters for a signature upload
Some application forms do not just limit the file size. They also check the image dimensions, written as "width × height in pixels". For example, they may ask for 140 × 60 px, 300 × 100 px or 350 × 150 px. If your image is 3024 × 4032 px straight from the phone, the portal may reject it, squash it into a tiny box, or crop off part of your name.
Many free resizers simply stretch the picture to the numbers you type. If your signature is long and thin but the box is almost square, the result looks tall and distorted. It may not match the signature you put on paper at the exam centre. This tool gives you three choices:
- Fit with white padding (recommended): your signature keeps its natural shape and sits in the centre. Empty space is filled with white, so the output is exactly the size you asked for.
- Fill and crop: the signature fills the full box, and a little of the edges may be trimmed. This is useful when the auto-crop already gives a very tight image.
- Stretch to exact size: forces the image to the width and height you set. Use it only when the source ratio is already close.
You can also tick Lock aspect ratio. Then type only the width, and the height is calculated for you from your signature's real proportions.
Common signature pixel sizes used in forms
| Dimension (W × H) | Ratio | Where you see it |
|---|---|---|
| 140 × 60 px | 7 : 3 | Banking forms (IBPS, SBI) and many state jobs |
| 200 × 80 px | 5 : 2 | College and scholarship portals |
| 300 × 100 px | 3 : 1 | Forms that ask for about 6 cm × 2 cm |
| 300 × 120 px | 5 : 2 | General high-resolution signature |
| 350 × 150 px | 7 : 3 | Some state commissions and universities |
| 500 × 250 px | 2 : 1 | Printed ID cards and certificates |
Converting cm or inches to pixels
When a notice gives centimetres instead of pixels, you need a DPI value to convert. The formula is simple: pixels = (cm ÷ 2.54) × DPI. Most portals are happy with 100 to 200 DPI for a signature. Some quick conversions:
| Size on paper | At 100 DPI | At 200 DPI | At 300 DPI |
|---|---|---|---|
| 3.5 × 1.5 cm | 138 × 59 px | 276 × 118 px | 413 × 177 px |
| 4 × 2 cm | 157 × 79 px | 315 × 157 px | 472 × 236 px |
| 6 × 2 cm | 236 × 79 px | 472 × 157 px | 709 × 236 px |
| 2.5 × 1 inch | 250 × 100 px | 500 × 200 px | 750 × 300 px |
Notice that 3.5 × 1.5 cm at 100 DPI is almost exactly 140 × 60 px. That is why this size is so common. For background on how screens and printers measure images, see Pixel (Wikipedia).
How to resize a signature by pixels
- 1Upload your signature
Any JPG, PNG or WebP photo or scan works. Auto-crop removes the empty paper first, so the pixels are used for your name.
- 2Choose the size
Pick a preset or choose Custom and type width and height. Tick Lock aspect ratio if you only know the width.
- 3Pick the fit mode
Leave it on Fit with white padding unless your form says otherwise.
- 4Set the KB limit and download
The default is 20KB. Change it to match your notice, check the green status, and download.
Good practice for pixel-perfect signatures
- Read the notice twice. "Width × Height" order matters. 60 × 140 is a tall box, not a wide one.
- Do not go below what your source can support. Shrinking is fine. Enlarging a small, blurry crop will not add detail.
- Check both rules. A 140 × 60 px JPG is often only 3KB–5KB. If the form needs a minimum of 10KB, fill in the minimum box, and the tool will meet it safely.
- For photos, use the matching tool. Exact photo dimensions are handled by Resize Image by Pixels and the Passport Photo Resizer.
Want a tool that already knows each exam's numbers? Open Signature for Exam Form. Everything runs privately in your browser, and nothing is uploaded.
Frequently Asked Questions
How do I resize a signature to 140 × 60 pixels?
Upload your signature on the PhotoKB Resize Signature by Pixels tool, choose the 140 × 60 px preset and click Download. The signature is fitted without distortion.
Will resizing by pixels stretch my signature?
Not with the default Fit with white padding mode. Your signature keeps its natural shape, and white space fills the rest of the box.
How do I convert cm to pixels for a signature?
Use pixels = (cm ÷ 2.54) × DPI. For example, 3.5 × 1.5 cm at 100 DPI is about 138 × 59 px, which is close to 140 × 60 px.
Can I set only the width and keep the ratio?
Yes. Choose Custom, tick Lock aspect ratio and type the width. The height is calculated from your signature automatically.
Can I also control the file size?
Yes. Use the KB slider and the optional minimum box. The tool keeps the exact pixel size and adjusts compression to fit the KB range.
What is the maximum size I can set?
You can set any size from 20 × 10 px up to 3000 × 3000 px.
About this tool
Built and maintained by the PhotoKB Editorial Team. We test every tool with real phone photos, scans and PDFs before each update. Exam and portal values are based on public official notifications. PhotoKB is not linked to any exam body, so always confirm current rules on the official website. Last updated: 8 November 2026.