AnyWebP

AnyWebP converts images into and out of WebP, Google's format that makes small files but is not opened by every program. It turns WebP into JPG, PNG, BMP or GIF, and turns the 36 input formats it lists, including HEIC, AVIF, TIFF and PSD, into WebP. The conversion runs on your own device inside the browser, so nothing is uploaded to a server. It takes hundreds of images in one batch, limited by your computer's speed rather than a server queue.

It is free and works without sign-up or an account. There are also Windows and Mac apps from the Microsoft Store and Mac App Store. It outputs only WebP, JPG, PNG, BMP and GIF, so it cannot produce a PDF or a TIFF.

Use AnyWebP when your job is getting images into or out of the WebP format:

• You downloaded a WebP image and the program you need it in will not open it, so you want a JPG or PNG.
• You are putting photos on a website and want them as WebP to cut the page weight.
• You have HEIC from a phone, or AVIF, TIFF or PSD files, and need them in a format everything reads.
• You have a large set to convert and want it in one go rather than file by file.
• The images are private. The conversion happens on your own machine, so they are never uploaded anywhere.

Skip AnyWebP if any of these describe you:

• You need an output format it does not make, such as PDF or TIFF. A general converter like Convertio covers more output types.
• You mainly want smaller files, not a different format. A dedicated image compressor gives you control over the quality trade-off.
• You need to change the pixel dimensions. Converting the format leaves the size alone, so use an image resizer.
• You want to edit or retouch the picture as well. That belongs in a photo editor, since this only changes the file format.
• You are converting a large batch on an old or slow machine. The work runs on your device, so your hardware sets the speed, not a server.