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Image resize, compress & convert — offline

Live before/after comparison, AVIF/WebP/JPG/PNG via bundled WASM codecs, batch ZIP export — and your photos never leave the browser.

100% private — files never leave your device

How it works

  1. 1

    Drop, paste, or pick images (HEIC works too).

  2. 2

    Adjust size, format, and quality — the preview and size readout update live.

  3. 3

    Download one image or everything as a ZIP. Esc clears the set.

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Frequently asked questions

Are my photos uploaded to resize or convert them?

No. Decoding and encoding run in your browser — WASM builds of the same codecs Chrome uses (via jSquash), inside a Web Worker. Personal photos never leave your device.

Why WASM codecs instead of the browser's built-in ones?

Consistency. Native AVIF/WebP encoding varies by browser (Safari especially). The bundled codecs produce identical output everywhere, and the browser's native encoder remains as an automatic fallback.

Which format should I pick?

AVIF gives the smallest files, WebP is nearly as small with wider support, JPG is the universal safe choice for photos, and PNG is lossless for graphics and screenshots.