Exact KB Targeting

Reduce Image Size in KB

Compress any image to an exact KB target — perfect for online forms, exam portals and email attachments.

Exact KB Auto Binary Search No Upload

Drop your image here

or click to browse — JPG, PNG, WEBP

Max 25 MB · 100% private

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Why WikisAI

Hit Any Exact KB Target, Every Time

Exact KBBinary search finds the sweet spot automatically.
100% PrivateNo upload — runs fully in your browser.
InstantAdjust, preview, download in seconds.
Free ForeverNo signup, no watermark, no limits.

Frequently Asked Questions

Common questions about exact KB compression.

How close to my target will the file be?
Usually within 5% of your target. If the target is very small for a large image, we may need to also reduce pixel dimensions.
Is my image uploaded?
No. Everything is processed inside your browser using HTML5 Canvas.
What's the smallest I can go?
Practical minimum is around 5 KB for most photos. Going smaller usually destroys quality.

Need a different size?

Try our resize by pixel tool for exact dimensions.

Resize by Pixel Explore All Tools