Convert image files between PNG, JPG, WebP, GIF, and BMP formats with alpha transparency preservation, quality control, and batch processing.
All formatting, parsing, decoding, and validation executes entirely within your browser using modern Web APIs and JavaScript. Your tokens, JSON payloads, regex inputs, and queries never leave your computer.
Different platforms, browsers, and legacy operating systems require different image formats: modern websites favor WebP for speed, design workflows require PNG for transparency, and photography benefits from JPEG's compact compression.
DevRef's Online Image Format Converter leverages the browser's native Canvas rendering and WebP encoder to convert raster graphics directly on your device. Convert transparent PNGs into modern WebP, decode WebP to standard JPG, or process hundreds of graphics simultaneously without queue limits. All operations execute 100% locally with zero server transmissions.
WebP provides roughly 25-34% smaller file sizes than comparable JPEG images and 26% smaller than PNGs while supporting both 24-bit RGB and 8-bit alpha transparency.
Since JPEG does not support alpha transparency, transparent areas are automatically replaced with a clean background color (white by default).
No. All conversion logic runs locally inside your browser using HTML5 Canvas. No image data is transmitted to external servers.