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Increase Image Size in KB - Make a Photo Reach the Minimum Size

Some portals reject pictures that are too small. Set a minimum size in KB and this tool pads the file without changing the picture.

What is Increase Image Size in KB?

Some application forms and portals require a minimum file size, for example 'photo between 50 KB and 100 KB'. If your photo is only 20 KB it will be rejected. This tool increases the file size by adding harmless padding bytes at the end of the file. The picture itself - its pixels, colours and sharpness - stays exactly the same.

How to use Increase Image Size in KB

1Upload the image that is too small.
2Type the target size in KB (for example 100).
3Press Start.
4Download the larger file and upload it to the portal.

Why use Increase Image Size in KB?

  • The picture does not change - only the file size grows.
  • Quick fix for 'minimum size' errors.
  • Private and free.
  • Works with JPG, PNG and WebP.

Who can use Increase Image Size in KB?

  • Applicants whose photo or signature is below a portal's minimum.
  • Students submitting documents online.
  • Anyone who sees a 'file too small' message.

When should you use it?

  • When a form says 'minimum 50 KB'.
  • When a compressed image became smaller than the allowed range.
  • When you need a file to match a size window.

Where can you use it?

  • Use it right before uploading to the portal.
  • Works in Chrome, Edge, Firefox and Safari on Windows, Mac, Linux, Android and iPhone - no app or software to install.

Tips for best results

  • Make sure your target is within the allowed range of the form.
  • The tool only increases size; if your file is already larger it tells you.
  • To lower the size instead, use Compress Image to KB.

Related tools

Compress Image to KBResize Image (pixels)Resize in cm / mm / inchPassport Photo MakerConvert Image FormatCrop ImageRotate & FlipBackground RemoverImages to PDF

Increase Image Size in KB - frequently asked questions

How do I increase image size in KB?

Upload the image, enter the KB you need and press Start. Download the padded file.

Does it change the image quality?

No. Extra bytes are added at the end of the file and the picture is untouched.

Why would I need a bigger file?

Some portals set a minimum size and reject very small files.

Can it make the size smaller?

No. Use Compress Image to KB to reduce the size.

Which formats work?

JPG, PNG and WebP images.

Is it free and private?

Yes. AllrounderBox is free, needs no sign-up and never uploads your files – processing happens on your own device.

Does it work on mobile?

Yes. It works in any modern browser on phones, tablets and computers.