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Resize Image in KB Online Free (Photo & Signature Resizer)

Get your photo or signature under the exact KB limit an online form asks for — and to the right pixel or cm size at the same time.

Free, no sign-upFiles stay on your deviceNo watermark
Drop a photo or signature here Select image Get it under 20 KB, 50 KB, 100 KB… with optional exact size.

How to resize an image in KB

  1. Add the photo or signature

    Select or drop the image.

  2. Enter the limits

    Type the maximum KB (and minimum, if the form has one). Optionally set width × height.

  3. Download

    We find the best quality that fits and show the final KB.

Everyday uses

  • Government exam forms – photo 20–50 KB and signature 10–20 KB are typical requirements.
  • Job applications – bank, railway and state PSC portals.
  • College and scholarship forms – photo and signature uploads.
  • Visa and passport photos – size and KB limits together.

Good to know

Many forms give a range, like 10–20 KB. Enter both values: the tool keeps the image as sharp as possible while staying inside the range. If you leave the width and height empty, a large photo may also be made smaller in pixels so it stays clear at the limit; enter the dimensions when the form asks for exact ones. Always check the official notification for the exact size and dimensions.

Signature tip: sign with a black pen on plain white paper, crop tightly (use Crop image), then resize here.

Private by design. Resize Image in KB works inside your browser. Your file is processed on your device and is not uploaded to our server.

Limits to know before you start

  • Very small limits (under about 10 KB) lower quality noticeably, especially for photos.
  • The output is JPG, which most forms ask for. Transparent areas become white.
  • Some portals count 1 KB as 1,000 bytes. Aim slightly below the limit.

If something goes wrong

A picture will not open. The file may be damaged or in a format your browser cannot read. Convert it to JPG with Convert Image, or take a screenshot of it, and try again.

The form says the file is too small. Enter the minimum KB too, so the tool keeps enough quality.

The form rejects the size. Aim a little below the maximum, because some portals count 1 KB as 1,000 bytes.

Resize Image in KB – questions

How do I resize a photo to 20 KB?

Add the photo, type 20 in “Maximum size (KB)” and press Resize to KB.

How do I resize my signature to 10–20 KB?

Enter 10 as minimum and 20 as maximum, optionally set dimensions like 140 × 60 pixels, and resize.

Can I set the size in cm too?

Yes. Choose cm, enter width × height and DPI.

What format is the output?

JPG, which most forms ask for.

This page describes Resize Image in KB as it works today. If you notice a difference, tell us and we will correct it. See our editorial standards.

Related tools

Step-by-step guide: How to resize your photo and signature for online forms