How to reduce an image to a specific size in KB
- Add one or more images above.
- Type the largest size allowed in Max KB. If there is also a smallest size, type it in Min KB.
- LightenPixel finds the best quality inside your limits, resizing only when it has to.
- Download the image, or download them all as a ZIP.
Popular sizes
What do KB and MB mean?
A kilobyte (KB) is a unit of file size: 1KB is 1,024 bytes and 1MB is 1,024KB. File size depends on two things — how many pixels the image has, and how strongly it is compressed. A 12-megapixel phone photo is usually 2–5MB; the same photo at 1,200 pixels wide and good quality is about 100–200KB.
Forms that ask for a size range
Many exam and job portals say something like "photo must be between 20KB and 50KB". Compressing too far is just as much a problem as not compressing enough. Fill in both Min KB and Max KB, and LightenPixel will keep the result inside the range — raising the quality, or the size, if the file would otherwise be too small.
Frequently asked questions
How do I reduce image size in KB without losing quality?
Set the largest size you can — the more KB you allow, the more quality is kept. Reducing oversized dimensions (with Max width) also keeps photos sharp at small file sizes.
Can I reduce several images to the same size?
Yes. Select or drop up to 50 images, set the size once, and download them all as a ZIP.
What if my image must be between two sizes?
Enter both Min KB and Max KB. The tool will make the result fit inside the range.
Does this work on my phone?
Yes, in any modern mobile browser. Your images are processed on your phone and never uploaded.