Convert Images to AVIF Online β Free & Next-Gen Quality
Convert JPG, PNG, WebP, and more to AVIF instantly.
Images are processed locally in your browser whenever possible. If local processing isn't supported or fails, we automatically complete the job on our servers β no action required. Supports JPG, PNG, WebP, GIF, BMP, and more. Lossy and lossless modes, batch conversion β no signup, no fees.
Why Use FastImageTools
Local-First Processing
Images are converted in your browser by default using WebAssembly. Automatic server fallback if needed.
Instant Results
Preview your AVIF conversion in real time before downloading. No signup or email required.
Completely Free
No file limits, no watermarks, no hidden fees. Professional-grade AVIF conversion at zero cost.
Next-Gen Compression
AVIF delivers up to 50% smaller files than JPEG at the same visual quality, with support for transparency and HDR.
How to Convert to AVIF
- 1
Upload Your Images
Drag and drop or browse your files. Supports JPG, PNG, WebP, GIF, BMP, and other common image formats.
- 2
Choose AVIF Settings
Select lossy or lossless mode, adjust quality, and configure transparency handling.
- 3
Download AVIF Files
Preview the result, then download your AVIF images individually or as a ZIP archive.
Browser-Based vs Cloud Conversion
FastImageTools (Local-First)
- Images stay on your device by default
- Instant conversion β no upload wait
- Handles large files locally when possible
- Free with no usage caps
- Automatic server fallback if needed
Cloud-Based Tools
- βFiles uploaded to third-party servers
- βSpeed limited by upload and download
- βTypical 5β25 MB file size limit on free tiers
- βOften requires paid plans for batch or large files
- βRequires a stable internet connection
Example Result
Original
3.8 MB
photo.jpg
Converted
0.6 MB
Lossy, auto quality β 128 colors
Supported Input Formats
JPG / JPEG
Photographs and web images. AVIF delivers dramatically smaller files with the same visual quality.
PNG
Screenshots and graphics with transparency. AVIF supports full alpha-channel transparency.
WebP
Modern web format. AVIF offers even better compression and quality than WebP.
GIF
Simple animations and graphics. Convert to AVIF for dramatically smaller static images.
SVG
Scalable vector graphics. Rasterized at configurable dimensions during conversion.
BMP
Uncompressed bitmap images. Convert to AVIF for the smallest possible file sizes.
Frequently Asked Questions
Does converting to AVIF reduce image quality?+β
Is it safe to convert images here?+β
What is the maximum file size I can convert?+β
Can I convert multiple images at once?+β
Which browsers support AVIF?+β
Does AVIF support transparency?+β
Is AVIF better than WebP?+β
Are my images uploaded to your servers?+β
Related Image Tools
Done converting? These tools work great as a next step:
Compress Image
Reduce file size of your AVIF images for faster loading.
Resize Image
Change dimensions for social media, email, or web.
Convert to WebP
Create a WebP fallback for browsers that don't support AVIF.
Convert to JPG
Convert to JPG for universal compatibility across all devices.
Add Watermark
Protect your images with text or logo watermarks.
Metadata Editor
View, edit, or strip EXIF and GPS data from images.