Free Online Image Converter

Convert images between formats instantly. No upload required - all processing happens in your browser. 100% private and free.

Choosing the right image format can mean the difference between a crisp, fast-loading page and a sluggish, blurry one. Each format was designed for a specific purpose: JPEG uses lossy compression optimized for photographs, producing small files at the cost of subtle detail loss. PNG uses lossless compression that preserves every pixel, making it ideal for graphics, logos, and anything requiring transparency.

WebP, developed by Google, combines the best of both worlds — lossy or lossless compression with transparency support, typically producing files 25-35% smaller than JPEG at equivalent quality. HEIC, Apple's default iPhone format, offers similar efficiency using the HEVC codec but lacks support outside the Apple ecosystem.

Legacy formats like BMP store raw uncompressed pixel data (resulting in huge files), GIF is limited to 256 colors but supports animation, and SVG uses mathematical vectors that scale to any size without quality loss. Understanding these trade-offs helps you pick the right format for every situation — whether you're optimizing a website, preparing print materials, or sharing photos with friends.

Unlike most online converters that upload your files to a remote server, our tool processes everything locally in your web browser. When you drop an image into the converter, your browser reads the file using the File API, draws it onto an invisible HTML5 Canvas element, and then re-encodes it in the target format — all without any network request leaving your device.

This approach has two major advantages: privacy (your images never touch our servers, so there is zero risk of data exposure) and speed (no upload/download wait times — conversion happens at the speed of your device's processor). For HEIC files, we use a specialized JavaScript decoder that runs entirely in the browser to handle Apple's format.

Batch processing works the same way — each image is converted independently on your machine. When you download a ZIP file, the archive is assembled in-browser using client-side JavaScript. At no point does any image data leave your computer.