Bulk HEIC to AVIF Converter
Convert iPhone HEIC photos to AVIF. The most efficient web image format available today, backed by Google, Apple, Netflix, and Mozilla. Get your iPhone photos web-ready with next-generation compression, full browser support, and zero server uploads. A built-in HEIC decoder handles everything right in your browser.
Your images
0 images addedConvert HEIC to AVIF in 3 Steps
No account, no install, no queue. Drop your HEIC files in and the AVIF versions are ready to download.
- Step 1
Drop your images in
Drag files onto the page, click to browse, or drop in a ZIP and every supported image inside is pulled out. JPG, PNG, WebP, AVIF, HEIC, GIF and BMP all work, mixed together in the same batch.
- Step 2
Adjust if you want to
Choose your output format and drag the quality slider. That is the whole setup. Settings holds a KB target, resizing and batch renaming if you want them, and can stay closed if you do not.
- Step 3
Download your AVIF files
Conversion starts on its own, so there is usually nothing to press. Batches over 40 wait for one click so nothing runs away with your machine. Download files one at a time or take the whole batch as a single ZIP.
Why Convert HEIC to AVIF?
Both HEIC and AVIF are efficient modern image codecs, but they serve completely different ecosystems. HEIC lives inside Apple's world and barely exists outside it. AVIF lives on the open web, supported by Chrome, Firefox, Safari, and Edge. If your iPhone photos are destined for a website, web app, or any online delivery pipeline, AVIF gives you the best compression available. Similar efficiency to HEIC, but with universal browser support and no Apple-ecosystem dependency. It's the format that takes your iPhone photography and makes it genuinely web-native.
High Efficiency Image Container
HEIC is Apple's proprietary photo format, default on every iPhone and iPad since iOS 11. It uses the HEVC codec to achieve excellent quality at compact file sizes. Perfect for device storage. But HEIC is locked to Apple's ecosystem. Web browsers don't support it, Windows requires a paid codec, Android can't open it, and no standard web image delivery pipeline handles HEIC natively.
AV1 Image File Format
AVIF is built on the AV1 codec. An open standard developed by an alliance including Google, Apple, Netflix, Mozilla, and Microsoft. It achieves compression comparable to HEIC but with universal support across Chrome, Firefox, Safari, and Edge. Full transparency support, HDR capability, and open-standard licensing make it the definitive choice for modern web image delivery from any source, including iPhone.
From iPhone to the Open Web.
HEIC is Apple's proprietary format. AVIF is the open web's format. Convert your iPhone photos into the most efficient web-native image format available. In bulk, privately, with no installation.
True Bulk Conversion
Convert 10 or 500+ HEIC photos to AVIF in one batch. No file limits. Process an entire iPhone photo export in a single run without throttling.
100% Private & Secure
Your photos never leave your device. Both the HEIC decoder and AVIF encoder run entirely client-side. No server, no cloud, no third party ever sees your images at any stage.
Adjustable Quality Control
AVIF retains exceptional visual quality at lower settings than JPEG or WebP. Quality 70–85 is the optimal range for iPhone source material. Use the before/after slider to verify before committing to a full batch.
ZIP Upload & Download
Export your iPhone photos as a ZIP and upload directly. Download all converted AVIF files as a single ZIP. Ideal for bulk photo library transfers to web publishing workflows.
Batch File Renaming
Replace meaningless iPhone filenames like IMG_8431.HEIC with clean, structured.avif filenames. Set prefix, separator, and numbering. Preview before downloading your batch.
the maximum size option
Need AVIF files under 100 KB for a CDN budget or upload limit? Set a target KB and the tool automatically finds the optimal quality for each individual photo to hit your target.
Works on Every Device
Windows, Mac, Linux, Chromebook, Android. Any modern browser runs the tool. No Apple software needed on Windows, no codec purchases, no extensions required.
Selective Processing
Upload a full iPhone photo export and select only the specific photos you need as AVIF. Only those files are converted. No pre-filtering of your library required before uploading.
HEIC Decoder Built In
Browsers can't natively decode HEIC. SmallerImages includes heic2any. An MIT-licensed HEIC decoder running entirely in your browser. No Windows codec purchase needed, no Apple software required on non-Mac machines. Also converts HEIC to WebP, HEIC to JPEG, and HEIC to PNG.
HEIC vs AVIF vs JPEG
How do the three most efficient modern image formats actually compare for web use? Here's the breakdown.
| Feature | AVIF | HEIC | JPEG |
|---|---|---|---|
| Browser support | Chrome, Firefox, Safari, Edge | No browser support | Universal |
| Compression efficiency vs JPEG | ~50% smaller | ~50% smaller | Baseline |
| Open standard | Yes (AV1 / Alliance for Open Media) | No (Apple proprietary) | Yes |
| Transparency support | Yes | Yes | No |
| HDR & wide color gamut | Yes | Yes | No |
| Windows support (no extras) | Yes (browser) | No (paid codec required) | Yes |
| Email client support | Limited | Limited | Universal |
| Best use case | Modern web delivery | iPhone device storage | Email, print, legacy |
When You Need HEIC to AVIF
If your iPhone photos are going online, AVIF is the smartest format they can arrive in. Here's where it makes the biggest difference.
Publishing iPhone Photos to Websites & Blogs
iPhone camera quality has surpassed dedicated cameras for most use cases. If you're publishing that photography to a website or blog, AVIF is the optimal delivery format. Dramatically smaller files than JPEG with comparable visual quality, loading faster on every connection and device.
E-Commerce Product Photography from iPhone
Many small business owners shoot product photos on iPhone. Converting those HEIC files to AVIF before uploading to Shopify, WooCommerce, or any web storefront gives you the best quality-to-size ratio in product galleries. Faster page loads and sharper images on high-DPI screens.
Reducing CDN Bandwidth Costs
If you're serving iPhone photography through a CDN, converting from HEIC to AVIF can halve your image bandwidth costs compared to JPEG, while maintaining higher visual quality. The savings compound significantly at scale across thousands of images and millions of requests.
Photo Portfolio Sites Shot on iPhone
Photographers and content creators shooting on iPhone for portfolio work benefit from AVIF's superior quality-to-size ratio. Visitors get sharper, more detailed images that load faster. Especially important on mobile connections and high-resolution displays where file size directly impacts perceived quality.
Building Multi-Format Web Asset Pipelines
Best practice for modern web delivery is serving AVIF with WebP and JPEG fallbacks using the HTML picture element. Convert your HEIC library to AVIF here to generate the primary delivery layer, then use our other HEIC converters to generate the fallback formats.
Web App & PWA Image Assets
Progressive web apps and web applications that include photography, real estate listings, restaurant menus, travel apps, news platforms, all benefit from AVIF's compression efficiency. Converting your HEIC source photos to AVIF cuts image payload sizes and improves Core Web Vitals scores that directly affect search ranking.
Trusted for HEIC to AVIF Conversion
Real feedback from people converting HEIC to AVIF every week, from teams in the UK, US, India, Japan, Pakistan, the UAE and beyond.
We had CloudConvert credits on the team budget purely for image conversion. This replaced it for the HEIC and AVIF work, which is most of what we were doing. Small win, but it adds up.
Added some files mid-batch and the button changed to say it would only process the new ones. Little detail, but it means I am not reconverting work that is already done.
The thing that sold me is that there is no upload. I opened devtools, converted twenty HEIC files to AVIF, and watched the network panel stay empty. That is a real privacy claim, not marketing copy.
Set the target file size to what my CMS allows and it found the best quality that fits. That one feature has saved me more time than everything else combined. No more converting, checking, adjusting, converting again.
Our product pages were loading slowly on mobile and it was almost entirely image weight. Converting the HEIC catalogue to AVIF cut the total page size by more than half.
Clear error messages when something is wrong. I had a file that was a renamed HEIC and it told me the contents did not match the extension rather than just failing silently.
I keep this open in a pinned tab. It loads instantly and the conversion is done before I have finished switching windows.
HEIC is great for compact photos on an iPhone, but nothing outside the Apple ecosystem will open it is a real problem once you have a few hundred of them. Converting to AVIF fixed that without me having to think about codecs.
I had just over 300 HEIC files from a product shoot that all needed to be AVIF. Dropped the lot in, walked away, came back to a finished batch. No queue, no "upgrade to convert more than 20 files" wall.
Runs fine on a locked-down work laptop where I cannot install anything. That is the entire reason I found this in the first place.
Being able to upload a ZIP and download a ZIP is what makes this usable for real work. I am not selecting 200 HEIC files by hand and I am definitely not downloading 200 AVIF files one at a time.
Tried the usual suspects including a ShortPixel subscription. The difference here is no file cap and no watermark on the free tier, because there is no paid tier to upsell you to.
HEIC to AVIF Conversion and Compression Explained
What changes when you convert HEIC to AVIF, what it costs, and how to pick a quality setting you will not regret.
Every iPhone since iOS 11 saves photos as HEIC by default, and every one of them stops being useful the moment it leaves the phone. Upload a HEIC to a website and it is rejected. Open one on Windows and you are asked to buy a codec. Send one to an Android user and they see nothing. Converting to AVIF solves that permanently: the pixels are identical, and the file now opens in software that was written this decade.
Both formats are lossy, so the conversion re-encodes rather than copies. Keep quality at 85 or above if the file is going to be edited again, and use the before and after slider to check the first image of a batch before you commit to the rest.
Set quality once and it applies to the whole batch, so a folder of two hundred files takes the same number of decisions as one. AVIF encoding is genuinely slower than the alternatives, so a large batch takes minutes rather than seconds. It runs on your own processor, which is why it is not instant, and also why nothing is queued behind other people's jobs. If you are working to a hard limit, such as a content management system that rejects anything over 200 KB, open Settings and set a maximum file size instead of a quality percentage. The encoder then searches for the best quality that fits your budget, file by file.
All Formats. One Tool.
HEIC to AVIF is one of twenty-four conversion paths here, and each one has its own page with defaults already set for that pair. Whichever you land on, the tool behind it is the same: it accepts JPG, PNG, WebP, AVIF, HEIC, GIF and BMP, reads ZIP archives, and handles up to 500 images in a single batch.
Conversion runs in your browser using your own processor, so nothing is uploaded, nothing is queued behind other people, and there is no account, no watermark and no daily cap. Close the tab and the files are gone from memory; they were never anywhere else.
If you need a smaller file rather than a different format, the image compressor keeps your originals and works to a quality level or a size in kilobytes. To change dimensions, the image resizer handles fit, fill and crop, or stretch across a whole folder at once.
Frequently Asked Questions
Quick answers about converting HEIC to AVIF.
Is it safe to convert HEIC to AVIF on SmallerImages?
Do I need to install anything to convert HEIC files?
How does AVIF compare to HEIC in terms of file size?
What quality setting should I use for AVIF output?
Does AVIF support transparency like HEIC?
Which browsers support AVIF?
Why convert HEIC to AVIF instead of JPEG or WebP?
How many HEIC files can I convert at once?
Is SmallerImages completely free?
Can I upload a ZIP of HEIC files?
Apple's Format for Storage. The Open Web's Format for Delivery.
HEIC is excellent at keeping photos compact on your iPhone. AVIF is the open standard that takes those photos to the web with the best compression available. No Apple ecosystem required, no codec purchases, no server uploads. Convert your HEIC library to AVIF for free, right now.
Convert HEIC to AVIF Now