GIF to AVIF Converter
You want to see how AVIF handles the picture from a GIF. This converter takes the GIF's first frame and encodes it as AVIF on your device, provided your browser can write that format. The result is a still image, so the animation is not preserved, and nothing is uploaded.
Embed this tool on your websiteShow code
Free to use on any site. Paste the code where you want the tool to appear. It runs inside the page; visitors' files are processed in their own browser and are not uploaded.
WordPress and most site builders have a "Custom HTML" block where this code can be pasted. The embed keeps a small link back to CalcMaster.
How to convert GIF to AVIF
- Add your GIF files by dropping them, clicking the drop zone or pasting.
- The output format is already set to AVIF. Adjust quality or size if you need to.
- Press Convert and compare the original and new size for each file.
- Download each file or all of them as a ZIP.
When to convert, and when not to
- You are testing AVIF for a website and want a sample from an existing GIF.
- You need a still image in a newer format with transparency support.
- You can keep a GIF, PNG or JPG fallback for tools that cannot open AVIF.
- Do not choose this for animations or for email and older programs, where AVIF support is limited.
What changes
- Only the first frame is converted, giving a still AVIF.
- AVIF is lossy here, and the quality slider controls how strongly it compresses.
- Transparency from the GIF is kept.
- The GIF's limited palette cannot be undone, so banding in the source remains.
- If your browser cannot encode AVIF, the AVIF button is disabled instead of producing another format.
A modern format for a very old one
GIF dates from the early days of the web and works with a tiny colour palette. AVIF is a much newer format that can describe images in far richer colour. Moving from one to the other changes the container, not the content, so a palette-limited GIF stays palette-limited in appearance.
Where AVIF can help is in storing that frame efficiently. Whether it actually does for your picture is something to test, not assume, since flat graphics and photographs behave differently.
Treat the conversion as a way to learn how AVIF behaves, not as a magic upgrade. Flat artwork, gradients, photos and text each reveal different strengths and weaknesses. By trying a variety of your own GIF frames you build a realistic picture of when AVIF is worth the extra care of serving fallbacks.
Run your own size comparison
Add your GIF, convert it at a few quality levels, and read the new size beside each result. Then convert the same GIF to WebP and PNG using the other converters on this site. Those quick checks show which format suits your type of picture.
Remember that the numbers belong to your file only. A cartoon and a photographic frame can behave very differently, so test a few examples before changing a whole site.
Consider the whole delivery chain, not just the file. A smaller image helps only if your server, CDN and the visitor's browser all handle the format properly. Test the converted file on the devices your audience really uses, and keep the original GIF or a PNG ready in case something along the way cannot display the AVIF.
Browser support for writing AVIF
This tool encodes AVIF with the browser's built-in encoder. Some browsers can read AVIF but cannot write it, and the page checks for this when it loads. If the check fails, the AVIF button is greyed out with a note.
You can still use another current browser on the same device, or pick a different output format that every browser can write.
On a shared computer, remember that the encoder belongs to the browser, so the same machine might offer AVIF in one browser and not in another. Switching browsers takes seconds and does not require installing anything on this page. Your frame is processed in the tab and is not stored or sent elsewhere at any point.
Privacy: your files stay on your device
- The tool decodes, resizes and encodes your pictures with your browser. The files are never sent to a server.
- To check it yourself: open the browser developer tools (F12), open the Network tab, convert a file, and look for any request that carries your image. You will see none.
Frequently asked questions
Why is AVIF unavailable on my device?
Your browser cannot encode AVIF. Try another current browser or pick another format.
Will it keep the GIF animation?
No. The output is a still AVIF made from the first frame.
Does the AVIF support transparency?
Yes, transparent areas of the GIF are kept.
Should I replace my GIFs with this?
Only if you need a still image. Check sizes on your own files and keep a fallback for programs that cannot open AVIF.
Is anything uploaded?
No. The frame is encoded locally in your browser.