How to Reduce Photo Size in KB

Why phone photos are so large

Modern phones take photos of 12 megapixels or more and save them at high quality. That detail is useful for printing, but an upload form shows the photo at a few hundred pixels wide, so most of the file size is wasted.

1. Lower the JPG quality first

Reducing JPG quality from 95% to about 70% often cuts the size in half with no visible difference. Compress image does this for a whole batch and shows the saving under each photo.

2. Set an exact limit in KB

When a form gives a limit, let the tool search for the best quality that fits. Use resize image to 20KB for exam photos, or resize image to 50KB for most document photos. The pixel size is reduced only if quality alone cannot reach the limit.

1. 1Choose the photo.
2. 2Check the maximum (and minimum, if your form gives one).
3. 3Download the result and check the KB shown.

3. PNG and screenshots

PNG files are lossless and can be ten times larger than a JPG of the same picture. Convert PNG to JPG first, then compress.

What if the photo becomes too small?

Some forms also set a minimum such as 20 KB. If your file is below it, increase image size in KB raises the size to an exact value without changing how the photo looks.

Tools used in this guide

• Compress ImageReduce JPG, PNG or WebP file size without visible quality loss.
• Resize Image to 20KBMake any photo under 20KB, e.g. 10–20KB for exam forms.
• Resize Image to 50KBMake any photo under 50KB while keeping it sharp.
• PNG to JPGConvert PNG images to smaller JPG files.
• Increase Image Size in KBMake a photo bigger in KB (e.g. 20KB → 50KB) when a form sets a minimum.

Frequently asked questions