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How to use SlimFit

Two ways to compress

Pick a target size — 50, 100, 200, or 500 KB — and SlimFit finds the highest quality that still fits your budget. Or switch to quality mode and set the compression level yourself with a slider. Output as JPG, PNG, or WebP.

Your images never leave your device

Everything happens locally in your browser using canvas. Nothing is ever uploaded, there's no account, and there's no server involved — just you and your files.

Resize while you compress

Cap the longest side of your images to shrink dimensions along with file size, all in the same pass.

FAQ

Is it free?

Yes — batches of up to 5 images are free forever, and target-size mode (the main feature) is always free. Pro (one-time) unlocks unlimited images per batch, WebP output, resize-while-compressing, and downloading everything as a ZIP.

Does it reduce my image quality?

You're in control. Quality mode lets you pick the exact compression level, and target-size mode automatically finds the highest quality that fits under your chosen KB budget.

What happens to metadata?

Compression strips EXIF metadata from your images as part of the process.

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