Reduce Image Size in KB — Free Online Tool
Shrink a JPG, PNG or WebP photo to an exact file size in kilobytes, or adjust the quality yourself. Everything runs locally in your browser, so nothing is ever uploaded, stored or shared.
or drag and drop a file here
How it works
Three steps, no install, no account.
Choose your photo
Drag it in or select a JPG, PNG or WebP from your device.
Pick a mode
Drag the quality slider, or enter an exact KB target.
Download
Save the reduced file straight to your device in seconds.
Why Reduce Image Size in KB?
Many upload forms cap files at a specific size, such as 20KB for a government form or 100KB for a job application. Consequently, guessing a quality percentage rarely lands on the exact limit. This tool solves that directly: enter your target size in KB, and it automatically searches for the compression level that gets closest to it.
How to Reduce Image Size in KB
Upload your photo, switch to Target Size mode, and type the KB limit you were given. Click Compress and the tool tests multiple quality levels internally until it finds the closest match, then shows you the result instantly. If you prefer manual control, Manual Quality mode lets you drag a slider instead.
Related tools and guides
Frequently asked questions
How do I reduce an image to a specific size in KB?
Switch to Target Size mode, type the KB you need (for example 20 or 100), and the tool automatically finds the compression level that gets closest to that size.
Is this tool really free?
Yes. It is completely free with no daily limit, no sign-up and no watermark.
Do you upload my photos to a server?
No. Compression happens entirely inside your browser using JavaScript, so your images never leave your device.
What image formats are supported?
You can compress JPG, PNG and WebP files. The output is saved as JPG for maximum size reduction.