How Batch Image Conversion Works in Your Browser
Modern browsers support high-performance off-main-thread image processing using Web Workers and OffscreenCanvas. By decoding and re-encoding raster image data locally, you can convert dozens of pictures instantly without uploading sensitive files to any external cloud server.
Supported Formats & Best Use Cases
- WebP: Next-generation image format offering superior lossy and lossless compression. Reduces file size by 25–35% compared to JPEG while preserving visual fidelity. Ideal for web performance and SEO Core Web Vitals.
- JPEG / JPG: Universal lossy compression standard best suited for photographic content and complex imagery where high color depth is required.
- PNG: Lossless compression supporting full alpha transparency. Perfect for logos, interface mockups, icons, and illustrations with sharp geometric boundaries.
Frequently Asked Questions
- Mes images sont-elles envoyées sur un serveur ?
- Non. La conversion et l'archivage ZIP s'effectuent à 100% dans la mémoire locale de votre navigateur.
- Combien d'images puis-je convertir simultanément ?
- Jusqu'à 20 images ou 50 Mo au total par lot pour garantir la réactivité.
- Comment télécharger toutes les images converties ?
- Cliquez sur "Tout Télécharger (.zip)" pour récupérer un dossier compressé unique.