How to use the Signature Resizer tool
- Sign your name in black or dark blue pen on plain white paper. Photograph it from straight above in daylight, or scan it, and select the picture here.
- Pick the size preset for your form, for example 140×60 px, 10–20 KB for Indian bank exams, or choose Custom and type the width, height and KB range from your form's notice.
- The tool finds the ink, crops away the empty paper and turns the background pure white. If grey paper or a shadow is still visible, move the Paper clean-up slider to the right.
- Choose the ink colour (as written, black or blue) and check the preview. The line under it shows the exact pixel size and file size.
- Click Download and upload the JPG to your application form.
Signature sizes asked for by common forms
These presets come from official notices that we read ourselves. The date shows when we last checked each source. Rules can change from one exam or year to the next, so open the notice for your own application and use Custom if it gives different numbers.
| Form | Pixel size | File size | Source (checked 8 November 2026) |
|---|---|---|---|
| Indian bank recruitment forms that follow the IBPS-style scanning guidelines | 140 × 60 px (preferred) | 10–20 KB, JPG | India Post Payments Bank application guidelines and Punjab & Sind Bank apprentice guidelines |
| Staff Selection Commission (SSC) exams, India | about 4.0 × 2.0 cm; we use 315 × 157 px, which is 4 × 2 cm at 200 dpi | 10–20 KB, JPEG | SSC Karnataka-Kerala Region notice of 7 December 2022 for CHSL 2022 |
The SSC notice gives the size in centimetres, not pixels. We convert it at 200 dpi, the minimum scanning resolution in the bank guidelines above, which gives a sharp signature that still fits easily under 20 KB. In Pakistan, recruitment bodies such as FPSC, PPSC and NTS each publish their own upload rules per advertisement. We could not find one official signature size that covers them, so use Custom with the numbers from your advertisement.
What the tool does to your signature
A photo of a signature is mostly empty paper, and that paper is rarely white. Under room lighting it looks grey, yellow or blue, and there is often a shadow from your phone. Upload forms then shrink the whole picture to a tiny box like 140 × 60 pixels, and the signature ends up as a faint scribble in one corner.
The Signature Resizer fixes this in four steps:
- Finds the ink. Every pixel darker than the clean-up level counts as ink. Single dust specks are ignored, so a stray dot does not stretch the crop.
- Crops tight. The empty paper around the signature is cut away, leaving a small margin.
- Whitens the paper. Everything lighter than the clean-up level becomes pure white. Pixels at the edge of each stroke are blended, so the lines stay smooth rather than jagged.
- Fits the box. The signature is scaled to fill the exact width and height you chose, centred, without being stretched out of shape.
The result is then saved as a JPG at the highest quality that keeps it under the maximum KB. If the form also has a minimum and the file is still too small, the tool pads the file as explained in the questions below, and tells you that it did so.
Getting a clean result
- Use a dark pen. A ballpoint or gel pen in black or dark blue works best. Pencil and light colours can disappear when the paper is whitened.
- Sign a little larger than usual. A signature that is about 6 to 8 cm wide keeps its detail after it is reduced to 140 pixels.
- Fix it with the slider, not by re-shooting. If grey patches remain, move Paper clean-up to the right. If thin parts of your strokes are breaking up, move it to the left.
- Check the numbers before you upload. The line under the preview shows the size in pixels and KB, for example “140×60 px · 10.0 KB · within 10–20 KB”.
Related tools
The same forms usually also want a photograph. Use the Passport Photo Maker to crop it to the right shape, or Compress Image to 20KB for a photo that only has a KB limit. If the form asks for documents as one file, put your scans together with JPG to PDF.
Frequently asked questions
What is the signature size for IBPS and other bank exams?
The scanning guidelines that Indian banks publish for their recruitment forms ask for a signature of 140×60 pixels (marked as preferred), between 10 KB and 20 KB, in JPG or JPEG format, signed in black ink on white paper. Pick the 140×60 px preset and the tool produces exactly that. Always check the notice for the exam you are applying to, because each one can set its own rules.
Why does my form reject a signature that is too small in KB?
Many forms set a minimum as well as a maximum, such as 10–20 KB, so that a signature is not compressed until it is unreadable. A clean signature on white paper at 140×60 pixels is often only 3 to 6 KB even at the best JPG quality. When that happens, this tool adds blank comment data inside the JPG file until it reaches the minimum. Image viewers and form checkers ignore that data, so the signature looks exactly the same.
Can I take the photo with my phone instead of a scanner?
Yes. Sign on plain white paper, put it on a table near a window, and take the photo from straight above so the line is not slanted. Fill most of the frame with the signature. The tool removes the empty paper around it, the grey tint and light shadows, so you do not need a scanner.
Should I choose black or blue ink?
Follow the form. The bank guidelines we checked ask for black ink on white paper. If you signed in blue but the form wants black, choose Black and the strokes are recoloured while keeping their smooth edges. Choose As written to keep your pen's own colour.
What is the transparent PNG option for?
A transparent signature can be placed over a document or letter without a white box around it, for example in a Word file or on a PDF. Most application forms want a JPG on a white background, so use the PNG option only when you are adding your signature to your own documents.
Is my signature uploaded anywhere?
No. Your signature is processed inside your browser on your own device and is never sent to our server. Close the tab and nothing is left behind. That matters for a signature, which someone could misuse if it leaked.
Guide by the ToolsYes team · Last updated