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Compress Image to 300 KB

Hit a 300 KB limit exactly — highest quality that still fits. Free, private, in your browser.

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JPG · PNG · WebP · HEIC · HEIF — processed privately in your browser

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Quick targets:

Your compressed images appear here. Nothing is uploaded — everything runs on your device.

Quick answer

To compress an image to 300 KB, upload your file above and FitToKB binary-searches the encoder quality to land at or just under 300 KB — never over. It runs entirely in your browser, free, with no signup and no upload.

300 KB is typically enough for a high-quality web photo or a detailed scan. FitToKB guarantees the result never exceeds 300 KB, so your upload form will accept it.

Nearby targets

TargetGood forGo
250 KBa high-quality web photo or a detailed scanCompress to 250 KB
300 KBa high-quality web photo or a detailed scanThis page
500 KBa large, sharp photo for most websites and formsCompress to 500 KB
← 250 KB 500 KB →

Frequently asked questions

How do I compress an image to 300 KB?
Upload your file to the tool above, keep the target at 300 KB, and download. FitToKB automatically finds the highest quality that stays at or below 300 KB.
Will the file go over 300 KB?
No. The engine only returns a result at or below 300 KB. If 300 KB is very small for the image, it lowers quality and, where allowed, resolution, and tells you if the target can’t be reached.
Does compressing to 300 KB reduce quality?
Some quality is traded for size, but FitToKB always uses the highest quality that fits 300 KB, so the loss is the minimum required to meet your target.
Is my image uploaded to a server?
No. Everything runs in your browser. Your file never leaves your device and nothing is stored.

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Compress your first image now

Free forever. No signup, no watermark, no upload. Everything runs on your device.

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