Convert HEIC to AVIF Online
Convert HEIC to AVIF without uploading your files anywhere. This converter runs entirely in your browser — your files never leave your device. Free, instant, and 100% private. No account or software required.
Choose HEIC files or drag & drop
Multiple files supported · No file size limit
Conversion Settings
How to Convert HEIC to AVIF - 3 Simple Steps
Upload Your HEIC File
Drag and drop your HEIC file into the upload area above, or click to browse your device. You can upload multiple files at once for batch conversion.
Adjust Settings
Set your preferred quality, resize dimensions, or other format-specific options. The default settings are optimized for the best AVIF output.
Download AVIF File
Click Convert and your AVIF file is ready instantly. Download individual files or click "Download All as ZIP" for batch results.
HEIC vs AVIF — Format Comparison
| Feature | HEIC | AVIF |
|---|---|---|
| File Size | Small (2x better than JPEG) | Very small (next-gen codec) |
| Compression | Lossy | Lossy or lossless (selectable) |
| Transparency (Alpha) | ✓ Supported | ✓ Supported |
| Animation | ✗ Not supported | ✓ Supported |
| Vector-based | ✗ No (raster) | ✗ No (raster) |
| Browser Support | Safari only (other browsers need conversion) | Chrome 85+, Firefox 93+, Safari 16+ |
| Best For | iPhone photos, Apple ecosystem | Next-gen web images, HDR content, maximum compression |
Also Convert HEIC to:
Convert Other Formats to AVIF:
Convert HEIC to AVIF Without Uploading — Why It Matters
Most online converters upload your files to remote servers for processing. ConvertTheFile is different — conversion happens 100% in your browser using modern web technologies. Your HEIC files never leave your device.
Zero Upload
Your HEIC files are processed locally. Nothing is sent to any server, ever. No cloud, no upload, no risk.
Complete Privacy
Perfect for sensitive documents, personal photos, and confidential files. We can't see your files because they never reach us.
Instant & Offline-Ready
No upload/download wait time. Conversion starts instantly. Works even with slow or no internet after the page loads.
Free, No Limits
No file size limits, no daily caps, no watermarks, no account required. Convert as many files as you need.
Batch Processing
Convert multiple HEIC files to AVIF at once. Select all your files and process them in parallel.
Works on Any Device
Runs in Chrome, Firefox, Safari, and Edge on desktop and mobile. No software to install.
How Does HEIC to AVIF Conversion Work Without Uploading?
Traditional file converters upload your HEIC file to a remote server, process it, and send back the AVIF result. This means your file travels across the internet and sits on someone else's computer.
ConvertTheFile works differently. When you drop a HEIC file into our converter, your browser reads the file locally and converts it to AVIF using built-in web technologies (Canvas API, WebAssembly, or JavaScript). The converted AVIF file is saved directly to your device. At no point does your file leave your computer.
This browser-based approach means zero privacy risk, faster conversions (no upload/download delay), and the ability to work offline after the page loads. It's the safest way to convert HEIC to AVIF online.
Frequently Asked Questions — HEIC to AVIF Converter
How do I convert HEIC to AVIF online?
Is it safe to convert HEIC files to AVIF online?
What is the difference between HEIC and AVIF?
Is this HEIC to AVIF converter free?
Can I batch convert multiple HEIC files to AVIF?
How long does HEIC to AVIF conversion take?
Does this converter upload my HEIC files to a server?
Can I convert HEIC to AVIF without uploading or installing software?
About HEIC (High Efficiency Image Container)
HEIC is Apple's default iPhone camera format, offering twice the compression of JPEG while maintaining the same visual quality.
Learn more about HEIC →About AVIF (AV1 Image File Format)
AVIF is a cutting-edge image format based on the AV1 codec, offering better compression than WebP and JPEG with support for transparency and HDR.
Learn more about AVIF →