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Compress Image to KB Online - Set Your Exact Size (20KB, 50KB, 100KB)

Choose a photo, type the size you need in KB and get a smaller JPG in seconds. Your picture never leaves your device.

What is Compress Image to KB?

An image compressor to a target size reduces the file size of a photo until it is at or below the limit you type, for example 20 KB, 50 KB, 100 KB or 200 KB. Many government exam forms, job applications, college admissions and visa portals reject photos and signatures that are even slightly too big. This tool lowers the JPEG quality step by step and, only when the limit is very small, also reduces the pixel dimensions, so you get the best-looking picture that still fits the limit.

How to use Compress Image to KB

1Click the upload box and select your JPG, PNG or WebP photo (or drag it in).
2Type the maximum size in KB, for example 50 for a 50 KB limit.
3Press Start. The tool finds the best quality that fits your limit.
4Rename the file if you want, then press Download. The result is a JPG that is at or below your target.

Why use Compress Image to KB?

  • Hits the exact size limit instead of guessing with a quality slider.
  • 100% private - the image is compressed inside your browser and never uploaded.
  • Free with no sign-up, watermark or daily limit.
  • Keeps as much detail as possible by shrinking pixels only when needed.

Who can use Compress Image to KB?

  • Students filling exam application forms (SSC, UPSC, banking, railway, NEET, JEE).
  • Job seekers uploading a photo or signature to a career portal.
  • Website owners and bloggers who want faster pages.
  • Anyone who needs to send a photo by email or WhatsApp quickly.

When should you use it?

  • When a portal says 'photo must be below 50 KB' or 'signature 20 KB'.
  • When an email attachment is too large to send.
  • When your website images slow down page loading.

Where can you use it?

  • Use it on any online form that asks for a size-limited photo.
  • Works in Chrome, Edge, Firefox and Safari on Windows, Mac, Linux, Android and iPhone - no app or software to install.

Tips for best results

  • Start with the original, large photo - do not compress a photo twice.
  • If the text or face looks soft, raise the KB limit a little if the portal allows it.
  • Use the Resize tool first if the portal also needs exact width and height in pixels.

Related tools

Resize Image (pixels)Resize in cm / mm / inchPassport Photo MakerConvert Image FormatCrop ImageRotate & FlipBackground RemoverIncrease Image Size in KBImages to PDF

Compress Image to KB - frequently asked questions

How do I compress an image to 20 KB?

Upload the photo, type 20 in the target size box and press Start. The tool lowers the quality and, if needed, the dimensions until the file is 20 KB or smaller.

Why is my compressed image still bigger than the limit?

Very large photos with fine detail can need a lower limit than the quality can reach. Resize the picture to a smaller width first, then compress it again.

Which format does the compressed image use?

The result is always a JPG, because JPG gives the smallest files for photographs.

Does compressing reduce image quality?

A little. The tool keeps the quality as high as the size limit allows, so photos usually still look good on forms and screens.

Is there a file size limit for my upload?

There is no fixed limit. Very large images depend on your phone or computer memory.

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.