IMAGE COMPRESSION
Reduce Image Size in KB — Set Your Own KB Target
Reduce an image to a KB size you choose, free. Enter any target and the tool lowers quality to get close to it, all privately in your browser.
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Shrink an image to a target size in KB
Sometimes the size limit you're facing isn't a round number — a form might want under 45KB, 75KB, or 150KB. This tool lets you type in whatever KB target you need and compresses toward it, instead of forcing you into a fixed preset.
It works like the fixed-size tools: it lowers JPEG quality step by step, scaling the image down if quality alone can't get there, and re-checks after each pass until the file lands close to the number you entered. The smaller the target, the more quality you trade away — a modest reduction stays crisp, an aggressive one shows softening. All of it runs on a canvas in your browser and never touches a server.
How to use it
- Upload your image and enter the KB target you need to hit.
- Let the tool iterate on quality (and scaling, if needed) toward your number.
- Confirm the resulting size and download the image.
Frequently asked questions
- Will it hit my exact number?
- It gets close. The tool lowers quality and re-measures in a loop until the file is at or just under your target, so you'll land near the figure rather than on an exact byte count. Setting the target as your hard cap keeps you safely under it.
- What if I set the target too low?
- A very small target on a detailed photo forces heavy compression and often scaling too, so quality drops and it can look soft or blocky. If the result looks poor, raise the target a little to give the encoder more room.
- Does reducing size change the dimensions?
- Only when it has to. The tool first tries to reach your target by lowering quality; it scales the pixel dimensions down only if a large or detailed image can't get there on quality alone.