What is Convert Image to PNG?
Convert Image to PNG transforms images from JPEG, WebP, AVIF, HEIC, BMP, TIFF, and GIF into the PNG format. PNG uses lossless compression — every pixel in the output is identical to the input. No quality is lost, ever. PNG also supports full alpha channel transparency with 256 levels of opacity per pixel. This makes it the go-to format for logos, icons, screenshots, UI elements, and any image where precision matters more than file size. Graphic designers use PNG for assets that need clean edges against any background. Web developers use it for sprites and interface elements. Document workflows use it for screenshots that must be pixel-accurate. The tool runs in your browser with no uploads, no watermarks, and no limits on file size or batch count.
Convert Image to PNG Formula
The conversion pipeline decodes any supported input format and re-encodes it using PNG's lossless compression.
Source Decoding
The input file is decoded to raw RGBA pixel data using the appropriate browser-native or bundled decoder. Lossy formats like JPEG are decoded at their existing quality — converting to PNG doesn't recover lost data, but it prevents any further quality loss.
Alpha Channel Handling
If the source format supports transparency (WebP, AVIF, GIF), the alpha channel is preserved in the PNG output. If the source is opaque (JPEG, BMP), the output PNG gets a fully opaque alpha channel.
PNG Encoding
The pixel data is filtered and compressed using DEFLATE lossless compression. The tool selects optimal PNG filter types per scanline to minimize file size while maintaining perfect pixel accuracy.