AVIF and WebP are both modern formats designed to make images smaller. AVIF is newer and usually compresses a little better. WebP has been around longer, so more apps, tools and older devices support it. If you have AVIF images and need them to work in more places without giving up the small file sizes, WebP is the natural middle ground. This guide explains how to use the AVIF to WebP converter and choose good settings.
Why choose WebP over JPG or PNG?
- Smaller files. WebP is much smaller than JPG for photos and smaller than PNG for graphics, so you keep most of AVIF's size advantage.
- Transparency. Like AVIF, WebP supports transparent backgrounds, including soft edges.
- Broad support. Every current major browser, many content management systems, and plenty of image editors open WebP.
If you need something that opens absolutely everywhere, including very old software, choose AVIF to JPG or AVIF to PNG. If you are publishing to the web or using modern apps, WebP is often the best balance.
Settings explained
Quality
For photographs, a quality between 75 and 85 typically looks excellent. Because the AVIF is already compressed, very high values mostly preserve existing artefacts and inflate the file.
Lossless
Lossless WebP copies every pixel exactly. Use it for logos, icons, screenshots and illustrations with flat colours and sharp edges. For photos, it produces large files and is rarely worth it.
What to expect
- Size: usually somewhat larger than the AVIF, but much smaller than JPG or PNG.
- Transparency: preserved, including semi-transparent edges.
- Colours: produced for standard displays, with colour profiles kept where present.
- Dimensions: unchanged.
Step by step
- Open the AVIF to WebP tool.
- Choose your AVIF or drag it onto the page. The page checks the real format and tells you if transparency is present.
- Choose a quality, or switch on Lossless for graphics.
- Press Convert to WebP.
- Check the size on the result page and download.
A worked example: a content management system that rejects AVIF
Your website platform lets you upload JPG, PNG, GIF and WebP, but not AVIF. Your designer delivered all the new banner images as AVIF. Converting them to WebP at quality 80 gives you files that upload without trouble and are still far lighter than JPGs would be. Visitors get fast pages, and you avoid going back to the designer.
A worked example: a transparent product cut-out
An online shop's product images are AVIF files with transparent backgrounds, so they can sit on different coloured sections of the site. The shop's mobile app, however, only understands WebP. Converting to WebP keeps the transparency intact and keeps file sizes small, so the app stays fast.
How to judge the result
Look at the WebP and the AVIF side by side at the size they will be shown. Pay attention to smooth gradients, fine textures and edges. If they look the same, your settings are right. If you notice softening, raise the quality by five and convert again. The whole check takes a minute and helps you settle on a setting you can reuse for similar images.
Common mistakes to avoid
- Using lossless for photographs. It makes files needlessly large.
- Expecting WebP to be smaller than AVIF. It usually will not be. The point is wider compatibility at a small size.
- Converting tiny icons. The difference is negligible; focus on your largest images.
- Throwing away the AVIF. Keep it as the smallest copy for platforms that support it.
Where AVIF still wins
If every place your image will appear supports AVIF, keep it. AVIF is generally more efficient and handles high dynamic range images better. WebP is the practical choice when you need to reach more devices, apps and older tools.
Limits
The tool page lists the maximum file size and dimensions. Typical web and phone images fit easily, and anything too large gets a clear message before conversion.
Privacy
Images are processed privately and never shared. Download links are personal and short-lived. Uploaded and converted files are deleted automatically after a short retention period, and guest files are removed shortly after download.
Frequently asked questions
Is WebP supported on iPhones? Yes, on current versions of iOS and Safari.
Will transparency survive? Yes. WebP supports the same smooth transparency as AVIF.
Which quality should I use? Start at 80 for photos and check the result. Use lossless for graphics with text or sharp edges.
Can WebP hold high dynamic range like AVIF? WebP targets standard displays, so HDR images are converted to standard range.
A little background on both formats
WebP was introduced by Google in 2010 as a faster alternative to JPG and PNG for the web. Over the following decade it gained support in every major browser, and today it is a routine part of website building. Many content systems, image tools and apps support it out of the box.
AVIF arrived later, built on the AV1 video codec developed by a group of large technology companies. It compresses even more efficiently and handles wider colour and brightness ranges, but because it is younger, support outside browsers is still catching up.
That history explains the trade-off in a sentence: AVIF is usually a little smaller, WebP works in more places. Converting from one to the other is about choosing reach without giving up the main benefit of a modern format.
Troubleshooting
The WebP is larger than I expected. Try a slightly lower quality, such as 75, and compare. If the image is a graphic, check whether lossless is switched on; for photos it should be off.
Text in my image looks soft. Switch on lossless, or raise the quality to 90.
The page says the file is not AVIF. Saved web images are sometimes mislabelled. The converter checks the real content and tells you which tool to use instead.
In short
AVIF to WebP keeps your images light while making them usable in far more places. Use quality around 75 to 85 for photos, lossless for graphics, and keep the AVIF where it is supported. It is the best compromise between modern efficiency and practical compatibility.