How to Convert HEIC to AVIF

HEIC and AVIF are technically close cousins — both are HEIF-container formats with comparable compression efficiency, but HEIC uses the patented HEVC codec while AVIF uses the royalty-free AV1 codec. That licensing difference matters in practice: AVIF has been embraced by browsers and open-source projects in a way HEIC never was, since Google, Mozilla, and most web platforms avoid HEVC specifically due to its patent licensing requirements. AVIF also supports slightly higher 12-bit color compared to HEIC's 10-bit.

Converting your iPhone's HEIC photos to AVIF makes sense if you're preparing images for web use, since AVIF combines HEIC-like compression efficiency with much broader browser support, letting you keep small file sizes without HEIC's compatibility problems on the web.

1. Install Turbo Batch Image Converter Pro on your Windows PC.
2. Open the app and select Batch Mode for multiple files, or Individual Mode for a single HEIC file.
3. Drag your HEIC file or folder into the app window, enabling recursive folder scanning if needed.
4. Set the "From" format to HEIC and the "To" format to AVIF.
5. Adjust the quality setting to balance file size against visual detail.
6. Click Convert. AVIF files are written to your output folder, fully offline.

• 100% offline — your photos are never sent to any server
• Bulk conversion of entire iPhone photo libraries in one pass
• Produces AVIF files with broader browser support than HEIC
• Multi-core processing for fast handling of large batches
• Option to delete original HEIC files automatically once converted
• No recurring subscription or hidden upload limits