Convert Images to AVIF Online
Convert JPG, PNG, WebP, and more to AVIF instantly.
Popular ways to use this tool
JPG and JPEG to AVIF
Convert JPG and JPEG files into configurable AVIF images
PNG to AVIF
Convert PNG files into configurable AVIF images
WebP to AVIF
Convert WebP files into configurable AVIF images
GIF to AVIF
Convert GIF files into configurable AVIF images
BMP to AVIF
Convert BMP files into configurable AVIF images
HEIC and HEIF to AVIF
Convert HEIC and HEIF files into configurable AVIF images
Images are processed locally when browser capabilities and current limits allow. Otherwise, the tool uses server processing when available. Supports JPEG, PNG, WebP, GIF as a still image, browser-decodable BMP, and HEIC/HEIF. Choose lossy or lossless AVIF and batch conversion within current limits.
Why Use FastImageTools
Local-First Processing
Images are converted in your browser when supported. Files outside local capabilities or limits use server processing when available.
Instant Results
Review your settings and estimated file size before converting. No signup or email is required.
Clear Workflow
No signup or watermarks. Available file and batch limits depend on the current plan and processing route.
Next-Gen Compression
AVIF supports efficient lossy and lossless encoding with alpha transparency. File size and visual quality depend on the source, settings, and processing route.
How to Convert to AVIF
- 1
Upload Your Images
Drag and drop or browse for one image or a batch within your current limits.
- 2
Choose AVIF Settings
Choose lossy or lossless mode, quality, alpha handling, encoder effort, and chroma settings. Custom quality is applied; 10-bit, flattening, and profile behavior depend on the processing route.
- 3
Download AVIF Files
Preview the result, then download files individually or as a ZIP archive.
Browser-Based vs Cloud Conversion
FastImageTools (Local-First)
- Images stay on your device by default
- No upload wait for files processed locally
- Handles large files locally when possible
- Available limits depend on the current plan and route
- Local processing avoids an upload when supported
Cloud-Based Tools
- —Files are sent to a remote server for processing
- —Speed limited by upload and download
- —File and batch limits vary by provider and plan
- —Pricing and batch access vary by provider
- —Requires a stable internet connection
Example Result
Original
3.8 MB
photo.jpg
Converted
0.6 MB
Lossy, auto quality preset
Supported Input Formats
JPG / JPEG
Photographs and web images. Converting a lossy JPEG cannot restore discarded detail; AVIF size and quality depend on the selected settings.
PNG
Screenshots and graphics with transparency. AVIF can preserve detected alpha; verify the output when small transparent regions matter.
WebP
Modern web format. Converting a lossy WebP cannot restore discarded detail, and AVIF is not guaranteed to be smaller for every image.
GIF
GIF images are converted as still images. Animation is not preserved in the AVIF output.
SVG
SVG input is not supported by the current upload workflow.
BMP
Browser-decodable bitmap images can be converted. Output size depends on image content and encoding settings.
Frequently Asked Questions
Does converting to AVIF reduce image quality?+−
Is it safe to convert images here?+−
What is the maximum file size I can convert?+−
Can I convert multiple images at once?+−
Which browsers support AVIF?+−
Does AVIF support transparency?+−
Is AVIF better than WebP?+−
Are my images uploaded to your servers?+−
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.