✍️ Signature for online forms

Signature Resizer: 10–20 KB for Exam Forms

Photograph your signature on white paper and get a clean, cropped JPEG at the exact pixels and KB range your application needs. Presets cover SSC, IBPS, SBI, UPSC, NEET and RRB, and everything runs in your browser.

  • ✓ Auto-crop to the ink
  • ✓ Whitens paper and darkens ink
  • ✓ Exact pixels and KB range
✍️

Drop a photo of your signature

or tap to choose — JPG, PNG or WEBP. Sign in black or dark-blue ink on plain white paper.

⚠️ Specs change every year. The presets are typical values compiled from recent notifications. Pixel size and KB limits vary by exam, post and year — always check the official notification or the upload instructions on the application portal before submitting.

What is a signature resizer?

A signature resizer turns a phone photo or scan of your handwritten signature into the small, tidy image that online forms accept. Exam and bank recruitment portals usually want something like 140 × 60 pixels and 10 to 20 KB, while a phone photo is thousands of pixels wide, grey and unevenly lit.

This tool finds the ink, crops around it with a margin you choose, cleans the paper to white and fits the signature into the required size. It then compresses the JPEG into your KB window and shows ticks for pixels, size and format.

How to resize a signature for an exam form in 5 steps

  1. Sign on plain white paper

    Use a black or dark blue pen and sign a little larger than usual.

  2. Photograph or scan it

    Shoot straight down in good light, with no shadow of your phone.

  3. Upload and choose the exam

    Pick SSC, IBPS/SBI, UPSC, NEET or RRB, or enter custom values.

  4. Check the crop

    Auto-crop boxes the ink; drag the corners if a stray mark got included.

  5. Download the JPG

    When all checks are green, save it and upload it to the portal.

Supported formats

JPG / JPEGinput · output

Phone photos and scans; output is always JPEG.

PNG / WebPinput

Transparent areas are filled with white.

BMP / GIFinput

Older scanner exports.

Files up to 50 MB are accepted and scaled to 2,400 px on the long side for processing. HEIC photos must be converted to JPG first. The cleaned output is grayscale.

How does it work?

The tool converts your photo to grayscale and estimates the local paper brightness with a morphological filter, so shadows and uneven light are flattened. Pixels much darker than the paper count as ink; their bounding box sets the crop. The cleaned signature is fitted into the target size and compressed to your KB range.

🔒

Stays on your device

Your signature is never uploaded.

✨

Ink detection

Crops to the signature, with 0–30% white space.

📏

Exact output

Fixed pixel size, KB checked against the range.

Signature size for popular exams

Typical values from recent notifications, used by the presets. Always confirm the numbers in your official notification, because pixel sizes and KB limits change between exams and years.

ExamPixels (typical)File size (typical)
SSC140 × 60 px (≈ 4.0 × 2.0 cm)10–20 KB
IBPS / SBI140 × 60 px10–20 KB
UPSC350 × 350 px (up to 500 px)20–100 KB
NEET UG (NTA)no fixed pixel sizehas varied, e.g. 4–30 or 10–50 KB
Railway RRB140 × 60 px (≈ 50 × 20 mm)10–40 KB

Recent UPSC forms ask for three signatures one below the other in a single image. Sign three times on one sheet, then use the UPSC preset and crop around all three.

How to sign and capture a signature that portals accept

On paper

Use plain, unlined white paper and a black ink pen, or dark blue if the notification allows it. Sign in your normal running hand, exactly as you will on the exam day attendance sheet. IBPS and SBI notifications state that signatures in capital letters are not accepted.

With your phone

Place the paper on a flat surface near a window, hold the phone parallel to the page and keep its shadow off the paper. Fill most of the frame with the signature area and tap to focus. A flatbed scan at 200 to 300 DPI works just as well.

After upload

Leave Clean background ticked for phone photos. If thin strokes fade, untick it and compare. Raise the white space slider if the signature touches the edges in the preview.

Keep one master copy

Save the original photo of your signature in a safe folder. Different exams, banks and university forms ask for different sizes, and resizing from the same clean original keeps your signature consistent across every application. Never reuse a heavily compressed upload as the source for the next one, because quality drops each time.

Why signature uploads get rejected

  • File size above the maximum or below the minimum.
  • Wrong pixel size, or a signature stretched out of shape.
  • Grey or shadowed paper, lines from ruled paper, or a pen that is too faint.
  • Signature too small inside the image, or cut off at the edges.
  • Typed, digital or capital-letter signatures where a running signature is required.
  • Signature that differs from the one you sign on exam day.

Bank exams often also want a left thumb impression and a handwritten declaration. These have their own sizes in the notification; set them with the Custom preset. For your photograph, use the exam photo resizer, and if the form wants a caption under it, add name and date on photo.

Frequently asked questions

SSC has typically asked for a signature JPEG of 10 to 20 KB. Older forms stated 140 × 60 pixels, while the newer portal describes about 4.0 × 2.0 cm. The SSC preset uses 140 × 60 px and 10–20 KB. Check your exam's current notice.
Upload a photo or scan of your signature, select a preset with 10–20 KB or type those values, and the tool crops, cleans and compresses it into that range at the exact pixel size. Download the JPG once the KB check shows green.
IBPS and SBI forms have typically used 140 × 60 pixels and 10 to 20 KB, signed in black ink on white paper. Capital-letter signatures are not accepted. Thumb impression and declaration have separate specifications, so read the notification for all four files.
Recent UPSC application forms ask candidates to sign three times, one below the other, on white paper and upload them as one image, typically 350 × 350 pixels and 20 to 100 KB. Photograph all three together, then crop around them with the UPSC preset.
Many notifications ask for black ink, while some accept black or dark blue. Black always photographs with the best contrast, so it is the safer choice. Avoid light blue, gel pens that smudge, and pencils, which turn grey and faint after cleaning.
It estimates the brightness of the paper across the image, flattens shadows and uneven light, turns the paper white and darkens the ink, then outputs grayscale. This makes phone photos look like scans. If your signature has very fine strokes, compare with the option off.
Lower the white space slider so less margin surrounds the ink, and check that auto-crop has not included a stray mark or paper edge. Signing a little larger on paper also helps. The signature is fitted to the output size with white filling any leftover space.
Not with this tool. Exam portals require JPEG, and JPEG has no transparency, so the output always has a white background. For a transparent PNG of your signature to place on letters, contracts or other documents, use the make background transparent tool instead.
Yes. Everything happens inside your browser, and the image is never sent to a server or stored. That matters for a signature, which can be misused. Close the tab when you finish, and avoid sharing the file outside the official portal.
Yes. Take the photo with your phone camera, open this page in the browser, choose the photo and pick your exam. The cleaned JPG downloads to your phone, ready to attach in the exam portal. It works on Android and iPhone browsers.