Precise KB Target
Set the exact maximum file size you need in KB. The tool compresses iteratively until the output fits within your target, not just a rough estimate.
Reduce Image Size in KB
Need to compress an image to a specific file size? Upload your image, enter the maximum KB you want, and the tool will automatically reduce the quality and scale until it fits. No accounts, no servers, everything runs in your browser.
Upload Your Image
Drag and drop or click to select - JPG, PNG, WebP supported
Processing is 100% in-browser. Your image is never uploaded.
Guide
How to Reduce Image Size in KB
1
Upload Your Image
Drag and drop or choose any image you want to compress.
2
Set the Target Size
Type the target file size in KB you want to reach.
3
Compress and Download
Click Compress and download the image at your exact target KB size.
Hit a Strict KB Limit Without Touching Quality
Email, government portals, and job applications all enforce strict file-size limits, often under 100 KB. The reducer compresses any photo to your exact target while keeping the result visually clean.
Faster than guessing JPG quality sliders, and the same image works on any portal that asks for a specific KB ceiling.
Benefits
Why Use This Image Compressor
Two-Phase Compression
First reduces JPEG quality progressively. If quality reduction alone is not enough, the tool scales down the image dimensions to meet the target.
Live Preview
The preview updates to show the compressed image so you can check quality before downloading. Transparent areas are shown on a checkerboard background.
100% Private
All compression is done locally in your browser using the HTML5 Canvas API. Your images are never uploaded to any server.
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FAQ
Frequently Asked Questions
Common questions about compressing image file size.
Is my image uploaded to a server?
No. The entire compression process runs locally in your browser using the HTML5 Canvas API. Your image is never sent anywhere.
What formats are supported?
JPG, PNG, and WebP images can be uploaded. The output is always saved as a JPEG file, which allows quality-based compression. PNG transparency is flattened to a white background.
What if the compressed file is still larger than my target?
The tool tries up to 15 quality reduction steps, then up to 10 dimension scaling steps. For very small targets (under 10 KB), it may not always reach the exact size if the image content cannot compress further without becoming unrecognisable.
Will the image dimensions change?
Only if quality reduction alone cannot reach your target KB. In that case, the tool scales down both dimensions proportionally while keeping the original aspect ratio.
Why does the output default to JPEG?
JPEG supports variable quality compression, which makes it the most effective format for reducing file size to a specific target. PNG uses lossless compression and cannot be reduced the same way.