No. ImageWrangler is strictly 100% client-side. Decoding, compression, and conversions happen in your browser memory using Web Workers and HTML5 Canvas. Your files never leave your device.

You can import and convert across AVIF, WebP, JPEG, PNG, and BMP.

AVIF and WebP deliver superior compression efficiency, producing 30% to 50% smaller file sizes than traditional JPEG and PNG while preserving sharp visual quality.

AVIF export relies on browser canvas encoding (supported in Chrome 116+ and modern Edge). If your browser does not yet support AVIF canvas export, ImageWrangler will alert you to choose WebP or JPEG.

It uses an automated binary-search optimization loop across canvas compression levels (down to ±0.4% precision) to hit your target file weight without guesswork.

Converting from PNG to lossless formats keeps original pixel data intact. Converting between lossy formats (JPEG to WebP/AVIF) re-encodes pixels, so setting quality to 85%+ or matching target size is recommended.

Merge All arranges all your loaded images into a balanced square grid (e.g., 4 images become a 2x2 grid) on a clean white canvas, exporting a single consolidated image ready for download.

Yes! Drag and drop multiple images at once, customize individual or bulk settings, and click "ZIP All" (or "ZIP Selected") to bundle everything into a single archive.

Yes. Once loaded, ImageWrangler requires no internet connection. All processing logic and workers run locally on your device.

Files up to 100MB and resolutions up to 15,000 × 15,000 pixels (50 megapixels) are supported. These limits prevent memory exhaustion and browser tab crashes.