AVIF Converter.
Bulk-convert images to the next-generation AVIF format on your Mac, safely and quickly. About 50% the size of JPEG, with HDR, wide gamut, 10/12-bit depth, transparency, and animation.
Contents
- What is AVIF
- How AVIF beats JPEG and WebP
- Why start AVIF now
- Why AVIF Converter.
- Key features
- Supported formats
- Who is it for
- FAQ
What is AVIF
AVIF (AV1 Image File Format) repurposes the keyframe compression of the AV1 video codec for still images. AV1 is an open, royalty-free next-generation video codec developed by the Alliance for Open Media (AOM), whose members include Google, Netflix, Amazon, Apple, and Microsoft.
In other words, AVIF brings the latest jointly-developed video compression technology to still images — a leap that finally lets image compression catch up with where video compression has been for years.
How AVIF beats JPEG and WebP
AVIF isn't just "smaller than JPEG." It supports virtually every modern visual requirement in a single format.
| Capability | JPEG | WebP | AVIF |
|---|---|---|---|
| Compression at equal quality | Baseline | ~25–35% vs JPEG | ~50% vs JPEG |
| Transparency (alpha) | No | Yes | Yes |
| Animation | No | Yes | Yes |
| 10-bit / 12-bit depth | No (8-bit) | No (8-bit) | Yes |
| HDR (PQ / HLG) | No | No | Yes |
| Wide gamut (Rec. 2020) | Limited | Limited | Full |
| Royalty | Free | Free | Free (AOM) |
What 10-bit / 12-bit depth gives you
JPEG and WebP encode each color channel at 8 bits (256 levels). AVIF supports 10 bits (1024 levels) and 12 bits (4096 levels). That's enough to render the gradient from sunset red to orange — or the subtle tones in a night sky —without banding. iPhone 12+ cameras already capture these smooth gradations; JPEG and WebP throw them away on the way to the web.
HDR & wide gamut: a new dimension on the web
Recent iPhone, iPad, and MacBook displays cover Display P3 and Rec. 2020 wide gamut and reproduce HDR (High Dynamic Range) accurately. But JPEG, PNG, and WebP have no first-class way to carry HDR, so until now, the web couldn't really show it. AVIF makes HDR photos on the web finally practical.
Why start AVIF now
Major browsers already support it
"Too new to ship?" Reality is the opposite.
- Chrome: since August 2020 (v85+)
- Firefox: since October 2021 (v93+)
- Safari: since macOS 13 / iOS 16
- Edge: since April 2021 (v90+)
On both desktop and mobile, AVIF is part of today's web platform.
The "early mover" advantage
WebP adoption has reached "table stakes." The next differentiator is AVIF. Wire it up in <picture> with AVIF → WebP → JPEG fallbacks and you ship dramatic savings to AVIF-capable browsers without breaking older ones.
Impact on SEO and performance metrics
Further image weight reductions feed directly into Largest Contentful Paint (LCP). Sites already on WebP routinely report another bump in Core Web Vitals after layering on AVIF.
Why AVIF Converter.
Even with AVIF's benefits clear, you still need a converter. Preview.app on macOS doesn't write AVIF, and CLIs like libavif require comfort with the terminal.
AVIF Converter. fills that gap.
- AVIF via drag and drop. No command line.
- Fully local. Original assets and confidential images stay safe.
- Convert from Finder's right-click menu. Slot it into your daily workflow.
- Preserve HDR and 10/12-bit depth through conversion. AVIF's full power, intact.
Key features
1. Batch AVIF conversion
Drop multiple images at once and convert them to AVIF in one go. Apple Silicon parallelizes the work, so even large batches finish quickly.
2. Resize with aspect-ratio lock
Resize during output. Specify a "max width 1920px" while keeping the aspect ratio intact. Useful for normalizing images for blogs and storefronts.
3. Watermarks
Burn in logos or text alongside conversion for theft prevention or brand consistency.
4. Size & preview comparison
See pre/post file sizes in the UI. Decide intuitively how much quality you can drop.
5. Finder context-menu integration
You don't even have to launch the app. Right-click an image in Finder and choose "Convert to AVIF."
6. Animated AVIF
Convert animated GIFs and animated WebPs to animated AVIF. Compared to GIF you usually get a much smaller file and noticeably better image quality.
Supported formats
| Direction | Formats |
|---|---|
| Read | PNG, JPG, HEIC, TIFF, GIF, WebP, and other major formats |
| Write | AVIF (primary). JPEG / PNG for fallback delivery. |
Who is it for
- Performance-minded front-end engineers — generate AVIF → WebP → JPEG fallback sets in one pass.
- Video and photo creators — bring HDR and wide gamut to the web.
- Image-heavy media operators — already on WebP and ready to take the next step.
- App and game developers — shrink asset bundles and improve download times.
- Independent bloggers — differentiate on raw site speed.
FAQ
Q. Is it safe to ship AVIF today?
Yes — the major browsers all support it. Use <picture> with AVIF as the primary and WebP/JPEG as fallbacks; older clients still get a normal image. "Move forward without risk" is genuinely the right description today.
Q. How is it different from WebP Converter.?
WebP Converter. specializes in WebP, AVIF Converter. specializes in AVIF. "AVIF-first site" → AVIF Converter. "Wide compatibility first" → WebP. The best practice is to use both and compose <picture> fallbacks.
Q. Can macOS Preview.app open AVIF?
Preview.app and Safari can open AVIF on macOS 13 Ventura or later. For earlier versions, use the QuickLook plugin bundled with Image Tool+, or write out PNG/JPEG alongside AVIF.
Q. How much quality do I lose?
At equal file size, AVIF is clearly better than JPEG. Conversely, you can drop AVIF down to half of JPEG's size and still match or beat its perceived quality. Adjust quality while comparing in the app's preview.
Q. System requirements?
macOS 11 Big Sur or later. Universal Binary for both Apple Silicon and Intel.
Download
AVIF Converter. is free to start. Add the features you need via in-app purchase or subscription.
Looking for WebP-only? WebP Converter.Want one app for everything? Image Tool+.