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OnePlaceTool

Resize Image to an Exact KB Size

Shrink a photo to an exact KB size for form uploads.

Your files stay on your device

Choose the photo to resize

JPG, PNG or WebP

or drag and drop here

Target size
Dimensions

How to use Resize Image to KB

  1. Pick a JPG, PNG or WebP photo, or drop it on the box.
  2. Set the target size. Most exam and job forms ask for 20KB or 50KB, but you can type any figure.
  3. If the form also states dimensions, set them in pixels, or in centimetres with a DPI.
  4. Press Resize image. The tool lowers quality step by step, and only scales the photo down if it has to.
  5. Check the before and after sizes, then download.

What this tool does

It re-saves your photo until the file fits the size limit you set, and it can give the image exact pixel or centimetre dimensions along the way. Quality is reduced first, because that costs the least visible detail. The image is only scaled down when quality alone cannot get under the target, and the tool tells you when that happens.

Sizes forms commonly ask for

Every organisation sets its own rules and they change between application cycles. The table below lists sizes seen often on Indian exam portals, which are among the strictest anywhere. Treat it as a starting point and always check the instructions for your own form.

Photo and signature sizes commonly requested by exam and ID portals
Form Photo Signature
SSC (CGL, CHSL, MTS) 20-50 KB, JPEG 10-20 KB, JPEG
IBPS and most bank exams 20-50 KB, 200 × 230 px 10-20 KB, 140 × 60 px
NTA exams (NEET, JEE) 10-200 KB, JPEG 4-30 KB, JPEG
RRB (railways) 20-50 KB, JPEG 10-20 KB, JPEG
Passport and most ID forms 3.5 × 4.5 cm at 300 DPI Not needed

A worked example

Say your phone produced a 4.2 MB photo at 3024 × 4032 px, and the form wants 200 × 230 px under 20 KB. Choose Exact size in pixels, enter 200 and 230, set the target to 20 KB and leave the format on JPG. The tool crops to the 200 × 230 shape from the centre, then finds the highest quality that still lands under 20,480 bytes. A typical headshot comes out around 14 to 18 KB and stays easy to read.

Limits worth knowing

  • Files above 60 MB are refused, because browsers get unreliable with images that large. Phone photos are nowhere near this.
  • Images are capped at 16 megapixels when you keep the original dimensions, which is the ceiling iPhones allow.
  • HEIC photos straight from an iPhone will not open, because almost no browser can read them. Switch your camera to "Most Compatible", or send the photo through WhatsApp first to get a JPG.
  • PNG has no quality dial, so a small KB target is usually out of reach in that format. For anything under roughly 50 KB, choose JPG.
  • Targets below 2 KB are refused. No photograph survives that, and a form asking for it almost certainly means something else.

Frequently asked questions

Why does an exam form insist on a photo under 20KB?

To keep their storage and bandwidth under control across millions of applications. The limit is printed in the notification along with the pixel size, and the portal rejects anything above it, even by one kilobyte.

Will resizing make my photo blurry?

Some quality is always lost, but the tool protects detail as long as it can. It lowers JPEG quality first and scales the image down only when that is not enough. A headshot at 20KB is usually still clear enough to pass.

Can I resize a HEIC photo from an iPhone?

Only if your browser can open HEIC, and most cannot. Change Settings, then Camera, then Formats to "Most Compatible" so new photos save as JPG. For a photo you already have, send it to yourself on WhatsApp or Mail, which converts it.

The tool cannot reach my target size. What now?

That happens when the target is very small and the dimensions are locked, because a given number of pixels needs a minimum number of bytes. Let the tool scale the image down, raise the target a little, or use smaller dimensions.

What is the difference between KB size and pixel size?

Pixel size is how wide and tall the image is, say 200 x 230 px. KB size is how much space the file takes. Forms usually state both, and the same 200 x 230 photo can be 15KB or 150KB depending on compression.