Convert images between JPG, PNG, WebP and AVIF

Which image format should you use?

Each format is a different trade-off between size, quality and compatibility, so converting is often about picking the right one for the destination:

• JPG is the universal format for photographs. It has no transparency, but every device, website and program opens it.
• PNG is lossless and supports transparency. It is ideal for logos, screenshots and graphics with sharp edges, but photographs saved as PNG are very large.
• WebP matches JPG quality at a smaller size, supports transparency and is understood by all modern browsers.
• AVIF is the newest and usually the smallest, but some older programs and devices still cannot open it.

What happens to transparency

Converting a PNG with a transparent background to JPG cannot keep the transparency, because JPG does not support it. Instead of leaving black boxes, which is what many converters do, this tool fills the transparent areas with a color you choose, white by default. Converting to PNG, WebP or AVIF keeps the transparency intact.

Converting between lossy formats

Every time an image is saved as JPG, WebP or AVIF, some detail is lost. Converting a JPG to WebP does not restore anything that JPG already discarded. To keep quality, convert from the original when you have it, and keep the quality setting high, around 90.

Formats your browser can write

Reading an image and writing one are different abilities. Some browsers can open an AVIF but not save one, and Safari cannot save WebP. This tool checks what your browser can actually produce and disables the options it cannot, so you never receive a file in a different format than you chose.

Photos from an iPhone

Photos taken with an iPhone are usually saved as HEIC, a format most programs and websites do not accept. Those files need a dedicated decoder, so this tool points you to a converter made for them.