Signature Resizer for Govt Exam Forms

What this tool does

The signature resizer takes a photo or scan of your signature and saves it as a JPG within the file-size range an exam form sets, typically somewhere between 10 KB and 50 KB, at an exact pixel size when the notification names one. It keeps the white paper white and the ink lines sharp, and it never sends the image off your device.

How it works

A signature is a different kind of image from a photo

A signature upload is mostly empty paper with thin dark strokes. That matters for compression. JPEG stores large plain areas in very few bytes, so a signature file is naturally tiny, while the thin lines are exactly the detail that heavy compression smears first. A good signature file therefore needs fairly high quality and a tight crop, rather than the aggressive squeezing a large camera photo can take.

Wide margins are the most common waste. If the signature fills only a small patch in the middle of a full sheet, resizing to 140 pixels wide turns the ink into a few grey specks. Cropping close to the strokes before uploading lets the same pixel budget carry the actual signature.

Pixel boxes and centimetre boxes

Banking forms usually give a small exact frame, such as 140 × 60 pixels. A state commission may instead describe a box you draw on paper. TNPSC is an example: “draw a box of dimension 6.0 x 2.0 cm (230 pixels x 75 pixels) on white paper” Here the box itself is part of the upload, so you crop to the outer edge of the drawn box, not to the signature inside it. In both cases, when you type a width and a height, the tool scales the image to exactly that frame. If your crop is a different shape, the strokes get stretched, so crop to roughly the same width-to-height ratio first. With only a width entered, the height follows your crop; with neither, the image is kept at its own width up to 500 pixels.

Getting under the maximum without blurring the strokes

The tool redraws your signature on a white canvas at the target size, then saves a JPG at high quality. Only when that version is larger than the maximum does it start lowering quality, testing values in a halving search so that it stops at nearly the best quality that still fits. Because signatures are small to begin with, most never need much reduction, and the ink stays crisp.

When a signature is too small for the minimum

The opposite problem is common with signatures. A neat signature in a 230 × 75 pixel box can compress to around 3–8 KB even at top quality, well under a 10 KB floor, and the form then refuses it for being too small. Re-saving at a bigger pixel size would break the required dimensions, and adding grain would make the signature look dirty.

Instead, the tool appends harmless comment segments inside the JPG. These segments are a standard part of the format that every decoder ignores, so the visible signature is byte-for-byte the same image while the file size rises to a little over your minimum. The padding target leaves room for portals that count a kilobyte as 1,000 bytes as well as those that count 1,024, and it is never allowed to push the file past the maximum.

Ink colour and paper

The ink setting in the tool records which colour your exam asks for and shows it in the spec box; it does not change the colour of your strokes. If the notification asks for black ink, sign again with a black pen rather than trying to darken a blue signature digitally. Pencil, sketch pens and thick markers all scan poorly: pencil turns grey and faint, while markers bleed into blobs at small sizes.

How to use it

1. Sign on plain paper. Sign on clean white, unruled paper with a black ball-point or gel pen, a little larger than your everyday signature.
2. Photograph or scan it. Lay the paper flat near a window and photograph it from straight above, so there is no shadow from your phone or hand.
3. Crop close to the ink. Use your phone’s crop tool to leave only a thin white margin around the signature. Do this before uploading.
4. Set the limits. Choose your exam in the preset list, or type the minimum and maximum KB, and the pixel size if the notification gives one.
5. Upload and check. Upload the cropped JPG or PNG. Check that the preview is sharp and the final size sits inside your range.
6. Download. Save the JPG and upload it in the signature field of the form, not the photo or declaration field.

Worked examples: the most common exam signature specs

The table lists the signature specs that appear most across the 166 exam and post pages on this site, built from the same rules as the exam pages. Each row groups exams that share identical numbers. Select the matching preset above, or follow the exam link for its full requirements.

“Not fixed” means no pixel size is given; enter only the KB range and the signature keeps the shape of your crop.

Common rejection reasons and fixes

These are the signature rules that cause most failed uploads, each quoted from an official notification with its source. The fix under each one says what to change before you try again.

Signature file outside the KB range

IBPS PO notification: “Size of file should be between 10kb – 20kb.”

Source

IBPS Detailed Notification, CRP PO/MT-XVI (Vacancies of 2027-28)p. 37 (PDF p. 40) · Annexure III, Signature“Size of file should be between 10kb – 20kb.”Open official PDF ↗

Enter both numbers in the tool. A tiny file is padded up to the minimum and a large one is compressed below the maximum.

Wrong frame size

IBPS PO notification: “Dimensions 140 x 60 pixels (preferred).”

Source

IBPS Detailed Notification, CRP PO/MT-XVI (Vacancies of 2027-28)p. 37 (PDF p. 40) · Annexure III, Signature“Dimensions 140 x 60 pixels (preferred).”Open official PDF ↗

Type the width and height exactly, and crop to a similar shape so the strokes are not squashed.

Wrong ink colour

IBPS PO notification: “The applicant has to sign on white paper with Black Ink pen.”

Source

IBPS Detailed Notification, CRP PO/MT-XVI (Vacancies of 2027-28)p. 37 (PDF p. 40) · Annexure III, Signature“The applicant has to sign on white paper with Black Ink pen.”Open official PDF ↗

Re-sign with the colour your notification names; recolouring a scan is not reliable.

Signature in capital letters

BPCL Associate Executive notification: “Scanned copy of Signature. Signature in CAPITAL LETTERS will NOT be accepted.”

Source

BPCL Recruitment – Entry Level Profiles (advertisement)p. 13 · How to Apply, Step 2 (vi)“Scanned copy of Signature. Signature in CAPITAL LETTERS will NOT be accepted.”Open official PDF ↗

Use your normal running signature, the same one you will sign at the exam centre.

Signed once where the form wants three signatures

UPSC EPFO notification: “Applicants are required to sign three times (one below the other) on a plain white paper using a black ink”

Source

UPSC Special Advertisement No. 52/2026, Assistant Provident Fund Commissioner (EPFO)p. 9 · 2. How to Apply, (i) Note 3“Applicants are required to sign three times (one below the other) on a plain white paper using a black ink”Open official PDF ↗

Follow the layout the notification describes, then crop the whole block as one image.

Grey paper, shadows or notebook lines

Photos taken indoors at night turn white paper grey, and ruled lines show up as stripes. Sign on unruled paper and photograph it by a window in daylight.

Frequently asked questions

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