Home › Image Resizer to KB › Reduce Image Size in KB

Reduce Image Size in KB

Type the KB you need, from 5 KB to 20 MB, and the tool fits your photo under it.

📁 Step 1 – Select Images (JPG, PNG, WebP, HEIC)

Step 2 – What do you want?

Compress (make smaller)Increase (make bigger)

Type the size in KB:

Advanced (optional): exact pixels or minimum KB

Many forms ask for pixels as well as KB. Leave empty if yours does not. Examples are common sizes only – always use the size your form states.

Width (px)×Height (px)

When the shape differs:Minimum KB (for ranges like 10–20 KB, Compress mode):

✅ Done! Your images are ready

About this tool

Instead of guessing a quality percentage, type the exact limit your form shows. The tool tries many quality levels and, only if needed, reduces pixels, until the JPG is as close as possible to your limit without going over.

How to use the image size reducer in KB tool

Select your image. JPG, PNG, WebP and iPhone HEIC all work, and you can pick several at once.
Check the size. The box is already set to 50. Change the number if your form says something different.
Press the green button and download a JPG under 50 KB, or one ZIP for many files.

Compress mode keeps the best quality that still fits under your limit.

Where this helps

Any upload limit

Works for 10KB, 20KB, 50KB, 100KB, 500KB, 2MB and every number in between.

Many files at once

Select a whole batch and download one ZIP.

Exact pixels

Open Advanced options to set width and height too.

All common formats

JPG, PNG, WebP and HEIC are supported.

What to expect

Results depend on the picture: simple images fit small limits easily, busy photos need smaller dimensions. The Done list shows Before and After sizes so you can confirm the result.

Frequently asked questions

What is the smallest size I can enter?

5 KB. For very small limits the image will also be reduced in pixels.

What if my image is already below the limit?

A JPG that already fits is kept as it is. PNG, WebP and HEIC files are converted to JPG.

Is there a daily limit?

No. Everything runs on your device, so there is no usage cap.

Is my photo uploaded anywhere?

No. Everything happens inside your browser, so your picture never leaves your device. No signup, no watermark.

Other sizes and tools

Prefer a percentage instead of a KB size? Use the quality-based image compressor, or read our image guides.