JPEG, PNG, and WEBP

Sites and apps accept different image types. A phone photo is often JPEG or HEIC. A logo with a transparent background needs PNG or WEBP. A page that should load quickly usually wants a smaller WEBP or a compressed JPEG. Converting is changing the container. Compressing is throwing away detail to make the file smaller.

Choose the format for the job

• JPEG for photos where a little softness is acceptable and transparency is not needed.
• PNG when edges must stay sharp or the background must stay transparent.
• WEBP when the page should be light and the browser can display it.

The image converter does the conversion in your browser. Open the file, pick the output format, and download the result. If you also compress, compare the preview with the original before you replace the file you care about. Compression cannot be undone inside the new file.

A converted image is still an image. To point people at a page instead of a picture, make a QR code for the link.

A worked example

A phone photo of a form is a 4 MB JPEG and a website wants it under 500 KB. Convert or compress it in the image converter and look at the result before you delete the original. If the text on the form goes soft, you compressed too far — keep a higher quality or switch to PNG for a scan of writing. A logo with a clear background should stay PNG or WEBP, not JPEG, or the background turns into a colored box.

Where the file goes next

A converted picture can sit beside a QR code that points at the page, or it can be the still you saved with the thumbnail article. Convert after you download, so you still have the source file.

Container and detail are different losses

Changing JPEG to PNG does not restore detail the JPEG already discarded. It only wraps the current pixels in a format that can be larger on disk. Changing a transparent PNG to JPEG paints a background, usually white or black, because JPEG has no transparency. WEBP can hold a photo or a transparent graphic and is often smaller, if the place you are uploading accepts it.

Compression is a second choice. It throws away more detail to shrink the file. Text in a photo of a form goes soft first. Faces go soft later. If you still have the original, compress a copy and compare them at the size the page will actually show. A file that looks fine at thumbnail size can look smeared when someone opens it.

Do the conversion in the browser when the file is private

A photo of an identity document, a medical form, or a family picture does not need to sit on someone else’s server just to change its extension. A converter that runs locally keeps the file on the machine. You still decide where the result is uploaded afterward. Conversion is not permission to publish it.