Resize Photo and Signature in KB for SSC, IBPS and UPSC Forms

Most SSC and IBPS application forms ask for a photo of 20–50 KB and a signature of 10–20 KB, both as JPG files; UPSC allows larger files (photo 20–200 KB, signature 20–100 KB). To get there, open the resize image in KB tool, choose the exam photo or exam signature preset, press Resize and download the JPG. It runs entirely in your browser, so your photo and signature are never uploaded to a server.

This guide explains what each setting in the tool does, gives step-by-step instructions for a photo and a signature, shows typical 2026 requirements (always confirm them in your own notification), and fixes the errors forms most often show.

What the KB resizer does, setting by setting

You add a JPG, PNG or WebP image (drag it in on a computer, or tap "Add a photo or signature" on a phone). The tool shows the original pixel size and file size, then offers these controls:

• Preset. Custom size; Under 20 KB; Under 50 KB; Under 100 KB; Under 200 KB; Exam photo (200 × 230 px, 20–50 KB); Exam signature (140 × 60 px, 10–20 KB); and Passport photo (413 × 531 px, which is 3.5 × 4.5 cm, under 100 KB). Choosing a preset fills in the boxes below, and you can edit any of them.
• Maximum size (KB) and Minimum size (KB, optional). Many exam forms have both a ceiling and a floor, so the tool handles both.
• Width and height (px, optional). Leave both blank to start from the original pixel size. Fill in only one and the other is worked out to keep the picture's shape. Fill in both for an exact size.
• Crop or fit. When both width and height are set, you choose "Crop to fill the size" (trims the edges evenly, best for face photos) or "Fit inside with a white border" (keeps the whole picture, best for signatures).

The output is always a JPG, the format exam portals ask for, so a PNG or WebP is converted automatically and any transparent area becomes white. To hit the size limit, the tool tries different JPEG quality levels and keeps the highest quality that fits under your maximum. If you left the pixel size blank and the quality would have to drop below about 60%, it makes the picture slightly smaller instead, which looks clearer than a heavily compressed full-size image.

The result line shows three things, for example "200 × 230 px · 34.2 KB · quality 88%": the pixel size, the file size and the JPEG quality used. The downloaded file is named after your original with the size added, such as photo-35kb.jpg. The tool also warns you if more than 10% of the picture was trimmed to fill the box, or if the picture was enlarged to more than twice its original size and may look soft.

Step by step: a photo of 20–50 KB

1. Take a fresh photo against a plain, light wall with even light on your face, looking straight at the camera. Follow any extra rules in your notification (for example about spectacles or caps).
2. Open the KB resizer and choose the photo. If your phone saved it as HEIC, convert it first with the HEIC to JPG converter.
3. Choose the preset "Exam photo · 200 × 230 px · 20–50 KB". If your notification gives a different pixel size, type it into the width and height boxes.
4. Keep "Crop to fill the size" so your face fills the frame without stretching. If the tool says a large part was trimmed, check the preview: if your chin or hair is cut off, crop the photo yourself first with the image cropper, leaving a little space above your head.
5. Press Resize image, compare the before and after previews, and check the result line shows a size between 20 and 50 KB.
6. Press Download JPG and upload that file to the form.

Small pixel sizes such as 200 × 230 can come out below 20 KB even at full quality, because there are only 46,000 pixels to store. When that happens, the tool adds harmless filler data (a JPEG comment block) to reach the minimum and tells you so. The picture itself does not change.

Step by step: a signature of 10–20 KB

1. Sign on plain white paper and photograph or scan it (tips in the next section).
2. Crop tightly around the signature with the image cropper, leaving only a thin white margin. A tight crop makes the signature fill the small box instead of floating in white space.
3. In the KB resizer, choose "Exam signature · 140 × 60 px · 10–20 KB". It sets "Fit inside with a white border", so the whole signature is kept and nothing is cut off.
4. Press Resize image, zoom into the preview and check every stroke is still visible, then download the JPG.

For UPSC, which asks for three signatures one below another in a single image, choose Custom, set the maximum to 100 KB and the minimum to 20 KB, and leave width and height blank so the tall image keeps its shape.

How to photograph or scan a signature well

• Paper and pen: plain white unruled paper and a black pen with a firm line (a gel or ball pen). Faint ink can turn patchy once the file is compressed.
• Size: sign at your normal size inside a light pencil box of about 7 × 3 cm. That has roughly the same shape as 140 × 60 px, so the signature fills the final image.
• Style: sign the way you normally do and will sign at the exam. IBPS notifications state that signatures in capital letters are not accepted.
• Light: daylight near a window works best. Avoid the flash (it causes glare) and make sure your phone's shadow does not fall on the paper.
• Angle: hold the phone flat above the paper, not at a slant. If the result is tilted, straighten it with the image rotator before cropping.

Typical 2026 requirements (check your own notification)

These are the sizes reported in recent 2026 notifications. Every notification sets its own rules and they change, so treat this table as a guide and confirm the numbers in the official PDF before you upload.

Exam	Photo	Signature
SSC (CGL, CHSL 2026)	20–50 KB, JPEG	10–20 KB, JPEG
IBPS (PO, Clerk, SO 2026)	20–50 KB, JPEG (200 × 230 px preferred)	10–20 KB, JPEG (140 × 60 px preferred)
UPSC (2026)	20–200 KB, JPG	20–100 KB, JPG

Other points from the same notifications:

• SSC: some exams capture a live photo inside the form, so an uploaded photo may not be needed at all.
• IBPS: also asks for a left thumb impression (20–50 KB) and a handwritten declaration (50–100 KB), captures a live photo, and rejects signatures written in capital letters.
• UPSC: the signature image holds three signatures, one below another, on white paper; a live photo is captured at submission.

KB, pixels, cm and DPI: what each one means

Forms mix up three different measurements, which is where most confusion comes from.

• KB is the file size: how much storage the file takes.
• Pixels are the picture's dimensions on screen, such as 200 × 230.
• Centimetres are a print size, and they only turn into pixels once you pick a DPI (dots per inch).

The conversion is: pixels = centimetres ÷ 2.54 × DPI. For a 3.5 × 4.5 cm passport-style photo at 200 DPI: 3.5 ÷ 2.54 = 1.378 inches, × 200 = 275.6, so 276 px wide; 4.5 ÷ 2.54 = 1.772 inches, × 200 = 354.3, so 354 px tall. At 300 DPI the same photo is 413 × 531 px, which is exactly the tool's passport preset.

Print size	At 200 DPI	At 300 DPI
3.5 × 4.5 cm photo	276 × 354 px	413 × 531 px
3.5 × 1.5 cm signature box (example)	276 × 118 px	413 × 177 px
200 × 230 px works out to	2.54 × 2.92 cm	1.69 × 1.95 cm

The file size depends on the pixel count, on how busy the picture is, and on the JPEG quality. More pixels means a bigger file; a plain background compresses far better than a patterned one. The DPI number stored inside a file is only a printing hint: it does not change the pixels or the KB, so if a form gives a size in pixels and KB, those are the two numbers to match. For more on exact pixel sizes, see how to resize a photo to passport size.

Is 1 KB 1,000 bytes or 1,024 bytes?

Both conventions are in use. Under the international standard, 1 kB is 1,000 bytes and 1,024 bytes is a "kibibyte" (KiB), but many programs and websites still call 1,024 bytes "1 KB". The gap matters at the edges. A 20 KB limit means 20,000 bytes under one convention and 20,480 under the other, so a 20,300-byte file passes one form and fails another.

The tool avoids the problem by measuring the maximum in 1,000-byte KB and the minimum in 1,024-byte KB. For a 10–20 KB signature it aims for a file between 10,240 and 20,000 bytes, which passes whichever rule the portal uses.

The result line displays sizes in 1,024-byte KB, so do not worry if a file made for a 20 KB limit shows as 19.5 KB: that is 19,950 bytes or so, safely under both versions of the limit. When the tool pads a file up to a minimum, it adds about half a KB of margin, so a 10 KB minimum gives roughly 10.5 KB and a 20 KB minimum roughly 20.5 KB.

Troubleshooting: when the form rejects your file

"File size exceeds the limit"

Check you set the maximum to the form's limit, not the minimum. If the tool itself says "this image cannot get below" your limit, the fixed width and height are too large for that many KB: lower the pixel size or leave it blank. A busy background also inflates the file, so a photo against a plain wall resizes better.

"File size is too small"

Fill in the Minimum box. Very simple signatures can be tiny even at full quality; with a minimum set, the tool pads the file to just above it without changing the picture.

The photo or signature looks blurry

Start from the original camera photo, not one forwarded through a chat app, which is often already heavily compressed. If the tool warned that it enlarged the picture more than twice, your source is too small: photograph it again closer up. For signatures, a thicker pen and better light help more than any setting.

"Invalid file format"

Most portals accept only .jpg or .jpeg. The tool always saves a real JPG, so upload the downloaded file rather than renaming a PNG or HEIC file by hand, which changes only the name and not the format.

Part of my face or signature is cut off

"Crop to fill" trims the edges evenly to fit the exact box. Crop the photo yourself first so your face is in the middle, or switch to "Fit inside with a white border".

The form takes a live photo instead

SSC, IBPS and UPSC now capture a live photo through your webcam or phone camera in some or all exams. You cannot resize that one; sit facing a window or lamp against a plain wall, allow camera access in the browser, and hold still.

For general image shrinking outside exam forms, the image compressor and image resizer work too, and compressing an image to 20 KB, 50 KB or 100 KB covers other kinds of forms.

Frequently asked questions

How do I resize a photo to 20 KB or 50 KB?

Open the KB resizer, choose "Under 20 KB" or "Under 50 KB" (or the exam photo preset for 20–50 KB), press Resize image and download the JPG. Add a pixel size only if your form asks for one.

How do I resize a signature to 10–20 KB for SSC?

Crop the signature tightly, then use the "Exam signature · 140 × 60 px · 10–20 KB" preset with "Fit inside". If your SSC notification lists different pixel dimensions, type them in before resizing.

Is my photo uploaded anywhere?

No. The resizing happens inside your browser on your own device, and the file goes nowhere until you upload it to the exam portal yourself.

Why does my file show 19.5 KB when I set 20 KB?

The tool keeps the file under 20,000 bytes so it passes forms that count 1 KB as 1,000 bytes, and it displays size in 1,024-byte KB. Either way, it is under the limit.

Can I do this on my phone?

Yes. The tool works in a mobile browser: tap "Add a photo or signature", pick the image, resize and download. The JPG saves like any other download.

Sources: SSC, IBPS and UPSC recruitment notifications for 2026 as reported (photo, signature and live-photo requirements; confirm in your own notification); IBPS preferred pixel sizes as listed in recent IBPS notifications; NIST reference on prefixes for binary multiples (IEC 60027-2); EthicalFusion resize image in KB tool (behaviour as of October 2026).