What is AVIF and why convert HEIC to AVIF?

AVIF (AV1 Image File Format) is a next-generation image format that achieves significantly smaller file sizes than JPEG, PNG, and even WebP at comparable visual quality. It also supports transparency, HDR, and wide color gamut. Converting HEIC photos to AVIF is ideal for web publishing and sharing — you get a modern, widely-supported format that's roughly 50% smaller than JPEG.

Can I crop the HEIC image before converting to AVIF?

Yes — the tool provides an interactive crop overlay on the source image. Drag the corner and edge handles to define exactly which portion of the HEIC photo you want in the output AVIF. Click Preview Crop to see the result before downloading.

Does my image get uploaded to a server?

No. All processing — loading, HEIC decoding, cropping, and AVIF encoding — happens entirely in your browser using JavaScript and the HTML5 Canvas API. Your image never leaves your device.

Which browsers support AVIF encoding?

Chrome 85+, Edge 85+, and Firefox 93+ support AVIF encoding via the Canvas API. Safari 16.4+ supports AVIF decoding but canvas AVIF encoding may vary. For best results use Chrome or Edge. If your browser doesn't support AVIF encoding, the tool automatically falls back to WebP output.

How does HEIC decoding work in the browser?

The tool first tries native browser HEIC support (available in Chrome 105+, Safari, and Edge). If native support is unavailable, it automatically falls back to the heic2any JavaScript library for full cross-browser compatibility. Either way, the decoded image is drawn to a Canvas and ready for cropping.

How do I reset and convert a different image?

Click the Start Over button that appears after loading an image. This clears the current file and resets the crop area so you can load a new HEIC photo.

HEIC to AVIF Crop Converter

Load a HEIC photo, drag the crop handles to define exactly the area you need, preview the result, then download a compact next-gen AVIF. Everything runs in your browser — your image never leaves your device.

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Drop a HEIC file here

or Browse Files · HEIC / HEIF supported

What This Tool Does

This tool loads a HEIC or HEIF image directly in your browser, decoding it using native browser support (Chrome 105+, Safari, Edge) or the heic2any JavaScript library as a fallback for full cross-browser compatibility. It presents an interactive crop overlay with draggable handles, and converts the selected area to a compact AVIF file using the browser's built-in Canvas API. No server upload is required. The full workflow — loading, HEIC decoding, cropping, and AVIF encoding — runs entirely in client-side JavaScript. AVIF offers roughly 50% smaller file sizes than JPEG at comparable quality, with support for transparency and HDR, making it the ideal format for web publishing.

Who This Is For

iPhone and iPad users who want to extract a specific region from a HEIC photo and share it on the web in a modern, compact format
Web developers and designers who need to crop iPhone photos and output optimized AVIF images for fast-loading pages
Content creators who want to trim and convert HEIC photos to AVIF without installing software
Anyone who wants to reduce image file size while maintaining quality — AVIF is significantly smaller than equivalent JPEG or PNG output

HEIC vs AVIF: Format Comparison

Property	HEIC	AVIF
Compression	Lossy or lossless HEVC	Lossy or lossless AV1
Color depth	10-bit HDR support	10-bit HDR, wide gamut
Transparency support	Yes — full alpha channel	Yes — full alpha channel
File size	Very compact — efficient HEVC	Even smaller — best-in-class AV1
Web browser support	Limited — codec required on most	Chrome, Edge, Firefox, Safari 16.4+
Platform compatibility	Apple-native; codec required elsewhere	Modern browsers and apps natively
Best for	iPhone storage, Apple ecosystem	Web publishing, sharing, modern apps

Frequently Asked Questions

What is AVIF and why is it better than JPEG for web use?▼

AVIF (AV1 Image File Format) is based on the AV1 video codec, which provides state-of-the-art compression. AVIF typically achieves 50% smaller file sizes than JPEG at equivalent visual quality, and also supports transparency, HDR color, and wide color gamut. It is natively supported in Chrome, Edge, Firefox, and Safari 16.4+.

How precise is the crop tool?▼

The crop operates at native pixel accuracy on the original HEIC dimensions. The canvas is scaled to fit your screen for display, but the actual crop coordinates are mapped back to the full-resolution image before the AVIF is generated. You get an AVIF at the exact pixel dimensions shown in the crop dimensions badge.

Can I move the crop selection after setting it?▼

Yes — click and drag anywhere inside the crop rectangle (away from the handles) to reposition it anywhere within the image. Handles resize; the interior pans.

What happens if my browser doesn't support AVIF encoding?▼

The tool uses the browser's Canvas toBlob() API with the image/avif MIME type. If your browser does not support AVIF encoding (e.g., older Safari), the download will fall back to WebP format automatically. For guaranteed AVIF output, use Chrome 85+, Edge 85+, or Firefox 93+.

What browsers are supported?▼

All modern browsers — Chrome, Firefox, Edge, Safari (desktop and mobile). The tool uses heic2any as a fallback for browsers without native HEIC support, ensuring HEIC files load correctly everywhere. AVIF encoding is best supported in Chrome and Edge.

Is there a file size limit?▼

There is no server-imposed limit because no upload occurs. The practical limit is your browser's available RAM. Most modern desktops handle HEIC files comfortably. Very large files on memory-constrained mobile devices may be slower to process.

HEIC to AVIF Crop Converter

What This Tool Does

Who This Is For

HEIC vs AVIF: Format Comparison

Frequently Asked Questions

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