How do I reduce an image to a specific file size?

Upload your image, set the target size in KB, choose JPEG or WebP, then compress it. The tool automatically finds the best quality level to reach your target.

Can I compress an image to exactly 100KB?

Yes. Set the target to 100 KB and the tool will compress the image to be at or below that size while preserving as much quality as possible.

What formats are supported?

JPEG and WebP are supported for output. You can upload other image formats and export them as JPEG or WebP.

Yes, completely free. No account and no upload required.

Are my images private?

Yes. Compression happens in your browser using WebAssembly, so your images never leave your device.

Compress Image to Specific Size (KB)

Reduce any image to a target file size — 100 KB, 200 KB, 1 MB, or any custom size. Our free tool uses binary search to find the best quality that fits your size limit. No upload — runs entirely in your browser.

Read our full guide

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Features

Set any target file size from 10 KB to 5 MB

Automatic quality optimization using binary search

Supports JPEG and WebP output formats

Batch compress multiple images at once

Shows final quality level and achieved size

Download individually or as ZIP archive

100% browser-based — images never uploaded

How to Use

Upload one or more images by drag & drop or click

Set your target file size (e.g. 100 KB, 500 KB)

Choose JPEG or WebP output format

Click Compress All and download your results

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100% private — your images are processed in the browser and never uploaded to any server.

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