Convert an image to any format

The output format matters more than the tool. Here is the simple rule:

• Choose WEBP for anything going on a web page. It is the smallest at the same quality and every current browser reads it. This is the right default for most conversions.
• Choose JPG when you are handing a photo to another person, uploading to a form that expects it, or opening it in older desktop software. Universal, but no transparency.
• Choose PNG only when you need transparency, or the image is a logo, screenshot or line art where crisp edges matter more than file size.

If you are unsure and the image is a photo, WEBP is almost always the answer. If it has a transparent background you need to keep, PNG or WEBP, never JPG.

One tool covers every direction. Here are the paths people use most, and what to expect from each:

• PNG to JPG. Drops transparency for a much smaller photo file. Set a background colour for any see-through areas first, since JPG fills them with a solid colour.
• JPG to PNG. Moves a photo into a lossless format. The file usually gets larger, so only do it when you need PNG for editing or transparency.
• Any image to WEBP. The smallest modern format for the web, readable in every current browser. The best default for images going on a page.
• Any image to AVIF. Smaller still than WEBP, written in Chrome and Edge. A strong choice for the web when you control the browser.
• SVG to PNG. Rasterises vector art to pixels at the size you choose, for places that will not accept an SVG.

For iPhone photos in HEIC, use the dedicated HEIC to JPG tool, which handles that format's special decoding.

This trips people up more than anything else. JPG has no way to store transparency, so the moment you convert a transparent PNG to JPG, those see-through areas have to become something: a solid colour, white by default. You can change that colour in the tool, but you cannot keep the transparency.

So if your image has a transparent background you want to keep, convert to PNG or WEBP, both of which have a full alpha channel. Convert to JPG only when a flat background is fine, or the image was never transparent to begin with.