WEBP to AVIF converter: free, fast and secure
Need to change an image from WEBP to AVIF? This tool does it instantly and for free, without uploading your pictures anywhere. Images saved from websites are often WEBP, and many photo editors, printers and upload forms still reject that format. Converting to AVIF fixes the “file type not supported” error. AVIF gives the smallest file size of any common format, perfect for speeding up modern websites and online stores.
Unlike most converters, ConvertKaro never uploads your images. The conversion happens on your own device, so it is quicker, there are no file limits, and your photos stay private.
How to convert WEBP to AVIF in 3 steps
- Add your WEBP files. Tap “Select files” or drag and drop one or more .webp images into the box above. You can also paste a screenshot with Ctrl+V.
- Adjust the options. Set the quality slider. Lower quality means a smaller AVIF file.
- Download your AVIF. Conversion starts instantly. Download each AVIF file, or all of them at once as a ZIP.
Why use ConvertKaro WEBP to AVIF? Free, fast and secure
Many online tools upload your file to a remote server and make you wait. ConvertKaro is different.
100% Free
Use WEBP to AVIF completely free, every day. No credit card, no “pro” version and no daily cap on files.
Fast results
No waiting for uploads to finish. The work happens on your device the moment you add a file, which makes it noticeably faster than server-based tools.
Secure and private
Your files never leave your device. ConvertKaro does not upload, store or look at your documents and photos, which makes it safe for ID cards, bank statements and private pictures.
No signup, no watermark
You do not need to sign up or log in, and your output is clean, without any logo or branding.
Works on every device
Nothing to install: it runs in any modern browser on phones, tablets and computers.
Quality you control
A simple quality slider lets you choose between the smallest file and the best picture, with a sensible default already set.
ConvertKaro vs other online converters
| ConvertKaro | Typical online tool | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your files | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
WEBP vs AVIF: what is the difference?
Before converting, it helps to know how the two formats compare.
| WEBP | AVIF | |
|---|---|---|
| Full name | WebP (by Google) | AV1 Image File Format |
| Type | Raster, lossy or lossless | Raster, lossy or lossless |
| Compression | Lossy and lossless | Lossy and lossless (AV1) |
| Transparency | Yes | Yes |
| Animation | Yes | Yes |
| File size | Very small | Smallest |
| Support | All modern browsers; some older apps cannot open it | Chrome, Edge, Firefox, Safari 16+; few desktop apps |
| Best for | Website images, faster page loads, e-commerce | High-performance websites, modern apps |
What is WEBP?
WEBP is a modern image format released by Google in 2010. It produces files roughly 25–35% smaller than JPG at similar quality, supports transparency like PNG and can even hold animation. Most websites now serve WEBP to load faster. The catch is compatibility: some older Windows photo viewers, editing apps, printers and upload forms still refuse WEBP files.
What is AVIF?
AVIF is the newest mainstream image format, based on the AV1 video codec. It often makes files 30–50% smaller than JPG and noticeably smaller than WEBP at the same visual quality, with support for transparency, HDR and wide colour. Modern browsers display AVIF, but many desktop apps, older phones and upload forms still cannot open it.
When should you convert WEBP to AVIF?
- Hero images and banners on modern websites
- Image-heavy apps where every kilobyte counts
- Next-generation e-commerce catalogues
- Testing the best possible compression
Tips for the best AVIF results
- For websites, 75–85% quality is usually the best balance between size and sharpness.
- You can convert many WEBP files at once. They are processed one after another and can be downloaded together as a ZIP.
- Keep your original WEBP files until you have checked the converted AVIF images.
How WEBP to AVIF keeps your photos and images private
When you add a file to WEBP to AVIF, it is opened with your browser’s own engine, processed in memory and offered back to you as a download. ConvertKaro never receives a copy. This is why the tool is fast even on 4G, why there is no daily limit, and why it is safe for confidential photos and images like ID proofs, bank documents, contracts and family photos.
Using WEBP to AVIF on your phone
On a phone, open this page in Chrome or Safari, tap the main button and pick files from your gallery, Files app or Google Drive. Results download straight to your phone, usually into the Downloads folder or Files app. You can also add this page to your home screen for one-tap access next time.
Who uses WEBP to AVIF?
You do not need any technical knowledge to use it. It is popular with:
- Students uploading photos and signatures to exam and admission forms
- Online sellers preparing product photos for Instagram, Meesho, Amazon and Shopify
- Office staff handling ID cards, scans and screenshots
- Bloggers and web designers who need fast-loading images
- Anyone sharing pictures on WhatsApp, email or social media
Supported input: JPG, JPEG, PNG, WEBP, HEIC/HEIF (iPhone), AVIF, GIF, BMP, TIFF and SVG.
Frequently asked questions
Will converting WEBP to AVIF reduce quality?
AVIF stores the image lossy and lossless (av1), so no extra quality is lost during conversion.
Does AVIF keep transparency from WEBP?
Yes. AVIF supports transparency, so transparent areas in your WEBP stay transparent.
Can I convert multiple WEBP files to AVIF at once?
Yes. Select or drop as many WEBP images as you like. Each one is converted separately, and you can download them all together as a ZIP file.
Why are images on websites saved as WEBP?
Websites use WEBP because it is much smaller than JPG and PNG, which makes pages load faster. When you save such an image, you get a .webp file that some apps cannot open.
Is WEBP to AVIF really free?
Yes, completely free. You can use it as many times as you want, and every option on the page is included at no cost.
Is it safe to use WEBP to AVIF online?
Yes. Your files are processed inside your own browser and are never uploaded to our servers, so nobody else can see them.
Does WEBP to AVIF work on mobile?
Yes, the tool is built mobile-first. Open this page on your phone, add your files and download the result directly.
Is there a file size limit in WEBP to AVIF?
There is no fixed limit set by us because files are not uploaded. Very large files depend on your device’s memory; most phones handle files of 100 MB or more without problems.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Your downloaded file is exactly your result.
Does WEBP to AVIF work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.