Image Format Converter

Image formats: when to use JPG, PNG or WebP and what you lose when converting

Choosing the right format is not a minor detail, it can triple file size or destroy a logo's transparency. This section explains the real differences, use cases and what actually happens during a conversion.

Three steps to convert images in batch without losing quality

1. Drag one or more images into the upload area or click to select files.
2. Choose the output format: JPG for photographs, PNG for images with transparency, WebP for modern web.
3. Download converted images individually or click Download all.

Use this tool on your site

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  src="https://jkit.tools/embed/en-US/image-converter"
  width="100%"
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Sources and references for this tool

These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.

• HTMLCanvasElement.toBlob(), Web APIsMDN Web Docs, Central API for client-side image format conversion via Canvas.
• WebP, An image format for the WebGoogle Developers, Overview of the WebP format, with lossy, lossless and alpha channel support.
• PNG Specification, ISO/IEC 15948W3C, PNG specification including deflate compression and 8/16-bit alpha channel.
• JPEG, ISO/IEC 10918-1W3C / ISO, JPEG standard defining the DCT (Discrete Cosine Transform) compression used for photographs.
• CanvasRenderingContext2D.drawImage(), Web APIsMDN Web Docs, Canvas method used to render the image before format conversion.

Frequently asked questions

Where to go next