Convert HEIC to AVIF - Free Online Converter

Use ConvertPort to convert HEIC to AVIF online with our free online converter. Upload your files below and download the converted results in seconds.

How it works

ConvertPort makes it easy to convert HEIC images to AVIF format. Simply upload your HEIC file, and we'll convert it to AVIF instantly — no software installation or account needed.

Upload Upload your HEIC image by dragging it into the box or clicking to browse.
Convert Convert — the output format is already set to AVIF, so just click the convert button.
Download Download your converted AVIF file instantly.

About HEIC images

HEIC (High Efficiency Image Container) is the default photo format on iPhones and many modern cameras. It uses advanced compression to store high-quality images in smaller files than JPEG, but is not widely supported on older devices and websites — converting to JPG, PNG, or WebP makes sharing easier.

About AVIF images

AVIF (AV1 Image File Format) is a modern image format that delivers excellent compression and quality. It is ideal for web photos when you need smaller files than JPEG or WebP with broad browser support.

HEIC — source format guide

What is HEIC?

HEIC is a container format that stores images using HEVC (H.265) compression, achieving roughly half the file size of JPEG at equivalent quality. It supports 16-bit color depth, transparency, multiple images in one file (Live Photos), and depth maps — but has limited support outside the Apple ecosystem.

When was HEIC invented?

HEIC is based on the HEIF (High Efficiency Image File Format) standard, published by MPEG in 2015. Apple adopted HEIC as the default photo format on iOS 11 (2017) and macOS High Sierra, making it the standard output for iPhone and iPad cameras.

What is HEIC used for?

Default photo capture on iPhones and iPads since iOS 11
High-quality image storage with efficient compression on modern devices
Live Photos and burst photo sequences on Apple devices
Professional workflows on macOS with Apple Photos and Final Cut Pro
Archival storage where file size matters and Apple compatibility is sufficient

Software that can open HEIC files

Best practices for HEIC

Convert HEIC to JPG before sharing photos with people on Windows or Android devices that may not have HEIC support.
Keep original HEIC files as backups when storage efficiency and quality matter on Apple devices.
On iPhone, you can set Settings → Camera → Formats → Most Compatible to save JPG instead of HEIC by default.
When converting HEIC for web use, prefer WebP for smallest file size or JPG for maximum compatibility.
Install the HEIF Image Extension on Windows 10/11 to open HEIC files natively without converting.

AVIF — output format guide

What is AVIF?

AVIF is a modern raster image format based on the AV1 codec. It typically delivers smaller files than JPEG or WebP at similar visual quality, supports HDR, wide color gamuts, and transparency, and is supported in all major browsers.

When was AVIF invented?

AVIF was finalized in 2019 as part of the AV1 video codec ecosystem developed by the Alliance for Open Media. It brings AV1 compression to still images and is increasingly adopted for modern web delivery.

What is AVIF used for?

High-efficiency web images and responsive picture elements
Photography where bandwidth and storage matter
Replacing large JPEG or PNG assets on performance-focused sites
Next-generation image delivery alongside WebP fallbacks

Software that can open AVIF files

Best practices for AVIF

Use AVIF for web photos when you can provide JPG or PNG fallbacks for older clients.
Keep quality between 50–80 for photos; very high settings rarely justify the extra bytes.
Test output on target browsers before replacing all site assets with AVIF.
Prefer AVIF over JPEG when optimizing Core Web Vitals and Largest Contentful Paint.

When to choose AVIF over HEIC

Converting HEIC to AVIF is useful when you need to optimize images for a specific platform or use case. Whether you are preparing photos for a website, reducing file sizes for faster loading, or switching to a format with different features like transparency or better compression, ConvertPort handles the conversion instantly while preserving as much quality as possible.

Best practices for converting HEIC to AVIF

Follow these guidelines to get the best results when converting HEIC images to AVIF:

Start with the highest quality HEIC source file available — converting a low-quality image cannot restore lost detail.
Choose AVIF when it fits your use case: JPG for photos and small file sizes, PNG for transparency and sharp graphics, WebP for modern web optimization.
Resize images to the dimensions you actually need before or during conversion to avoid unnecessarily large output files.
Review the converted AVIF file at full size before publishing or sharing to confirm quality meets your expectations.

Benefits of using ConvertPort

ConvertPort offers free, instant HEIC to AVIF conversion directly in your browser. There is no software to install and no account to create. Files are processed securely and are not stored on our servers after conversion. ConvertPort works on any device — desktop, tablet, or smartphone — and supports batch conversion of up to five images at once.

Your data security and privacy

ConvertPort is designed with privacy first. When you upload images for conversion, your files are handled securely and are never stored permanently on our servers.

How we protect your uploads

All transfers use HTTPS/TLS encryption, so your images are encrypted in transit between your browser and our servers.
Files are uploaded directly to private cloud storage via time-limited presigned URLs that expire after 15 minutes — no public links are ever created.
Uploaded files and converted results are automatically deleted within 48 hours. Download links expire after 24 hours.
Only validated image formats (JPG, PNG, WebP, HEIC, AVIF, TIFF, and GIF) are accepted. File type is verified by MIME type and content inspection, not just the file extension.
Rate limiting prevents abuse. Security headers including Content Security Policy (CSP) protect against common web attacks.
We do not sell, share, or use your images for training or any purpose other than completing your conversion request.

Data retention policy

Uploaded source images and converted output files are automatically removed from our systems within 48 hours of upload. Job metadata is purged on the same schedule via database TTL. We do not maintain an archive of your files.

Security frequently asked questions

Does ConvertPort store my images permanently?

No. Your uploaded images and converted files are automatically deleted within 48 hours. We do not keep copies, backups, or archives of your files.

Can other people access my uploaded images?

No. Files are stored in private cloud storage with no public access. Only you can download your converted files using the unique, time-limited download link provided after conversion.

Is my connection encrypted when I upload images?

Yes. All communication with ConvertPort uses HTTPS with TLS encryption. Your images are encrypted in transit and never sent over an unencrypted connection.

Frequently asked questions

Is HEIC to AVIF conversion free?

Yes, converting HEIC to AVIF with ConvertPort is free. There are no hidden fees, watermarks, or required accounts. You can convert up to five images per batch, with files up to 10 MB each.

Will converting HEIC to AVIF reduce image quality?

Quality depends on the formats involved. Converting from a lossless format like PNG to a lossy format like JPG may reduce quality slightly. ConvertPort uses high-quality conversion settings to minimize any visible loss. For the best results, start with the highest quality source image available.

How long does HEIC to AVIF conversion take?

Most HEIC to AVIF conversions complete within a few seconds. Larger files up to the 10 MB limit may take slightly longer. You can convert up to five images in a single batch.

What is the maximum file size for HEIC uploads?

ConvertPort accepts HEIC files up to 10 MB each. You can upload up to five images at once for batch conversion to AVIF.

Do I need to install software to convert HEIC to AVIF?

No. ConvertPort runs entirely in your web browser. Upload your HEIC file, convert to AVIF, and download — no downloads, plugins, or accounts required.

Are my HEIC images kept private during conversion?

Yes. Your uploaded HEIC files are stored in private cloud storage, processed securely, and automatically deleted within 48 hours. Download links expire after 24 hours. We never share or permanently store your images.

Convert HEIC to AVIFFree Online Converter

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