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Free image tool

Photo Resizer in KB

Resize and compress your images to a target file size in seconds, right in your browser. Upload your image and set a KB target on the left, then preview and download the optimized photo on the right.

Working field

Upload an image and set a target size.

Upload image

Enter the desired size in KB (for example, 100).

Tip: The tool gets as close as possible to your target KB. Very detailed photos may land slightly above or below it.

Result

Your resized image appears here.

Upload an image on the left and set a target size. Your original and resized previews will show here.

This tool is best for hitting strict upload size limits on forms and portals.

Free Online Photo Resizer in KB

Resize and compress your images to a target file size, like 20KB, 50KB, 100KB, or 200KB, without losing too much quality. This tool keeps the workflow simple: upload on the left, supporting content below, and the sidebar on the left for popular and related tools.

Target KB sizing

Set the exact file size you need, and the tool gets as close as it can.

Smart compression

Advanced HTML5 canvas compression trims the image while keeping it clear.

Side-by-side preview

Compare your original and resized images before you download.

Private by design

Everything runs in your browser, so your images never leave your device.

How it works

  1. Click the upload zone or drag and drop your image on the left.
  2. Enter your target size in KB, such as 50 or 100.
  3. The tool compresses your image to match that size right away.
  4. Compare the original and resized previews in the result panel.
  5. Click Download Resized Image to save the optimized photo.

Best practices

  • Check the exact size limit before you start, like under 100KB.
  • Start with a higher-quality original for better-looking results.
  • Adjust the target KB if the first result misses the mark.
  • Use a slightly higher target for photos with lots of detail.
  • Keep your original file in case you need to redo the resize.
  • Preview both images to confirm the quality before downloading.

Frequently asked questions

Can I resize to the exact KB?

We aim to get as close as possible to your target size (like 50KB, 100KB, or 20KB) using intelligent compression and resizing. Results may vary slightly depending on the image content and complexity.

Is this Resize Photo tool secure?

Absolutely. All compression happens in your browser using HTML5 canvas. No images are uploaded or stored on any server, so your privacy stays intact.

Which image formats are supported?

The tool supports JPG, PNG, and WebP formats. The output is an optimized JPG for maximum compatibility and minimal size.

Does it work on mobile?

Yes. Our image resizer is fully responsive and works perfectly on phones, tablets, and desktops, with no app required.

Need more image tools? Shrink files for general use with the Image Compressor tool, or try more size options with the Photo Resizer by KB tool.