Image Converter

No. Every image is decoded, converted, and re-encoded entirely in your browser using the HTML5 Canvas API. Your original files and the converted output never leave your device, never touch the Toobits server, and are not uploaded to any third-party service. The tool works offline once the page has loaded.

The converter accepts PNG, JPG/JPEG, WebP, BMP, and GIF as input. You can output to PNG (lossless with alpha), JPG (lossy, smallest files for photos), WebP (best all-round modern format), or BMP (uncompressed). Format conversion is done through the browser’s Canvas API with quality controls for the lossy formats.

There is no hard limit imposed by Toobits, but practical performance depends on your browser’s memory and the Canvas API’s texture-size constraints. Most desktop browsers can comfortably handle images up to roughly 100 megapixels (e.g., 10000×10000). Very large RAW or uncompressed images may take longer to decode and re-encode — consider compressing first if the conversion stalls.

For photographs, use WebP (best compression) or JPG (widest compatibility). For images with transparency, text, or sharp edges (logos, screenshots, icons), use PNG or WebP. WebP supports both lossy and lossless compression and is supported by all modern browsers.

Converting from a lossy format (JPG) to another lossy format (WebP) involves re-encoding, which can reduce quality slightly. Converting from lossless (PNG) to lossy (JPG) discards some data permanently. Converting from lossy to lossless (JPG to PNG) preserves the current quality but cannot recover lost detail. For best results, always work from the highest quality original.