AVIF Converter. · macOS · Blazing fast · 100% offline
Effortless AVIF batch processing. Hundreds of images, done.
Convert, resize, optimize, and watermark — process entire folders in a single pass, right on your Mac. About 50% the size of JPEG, with HDR, wide gamut, 10/12-bit depth, transparency, and animation. No uploads, no waiting.
Drop a folder
or images. Done.
Bulk in, bulk out
Instant
AVIF Conversion
HDR · 10/12-bit · Alpha · Animation
100% on your Mac
No upload · No account
Fast, native, secure
Apple Silicon-optimized
Free to download
macOS 11+ · Apple Silicon native · 100% local processing
Three steps, done
Drop your images
Drag PNG, JPG, HEIC, or WebP from Finder. Or right-click and "Convert to AVIF".
Check quality
Compare before/after sizes in the UI. HDR and 10/12-bit depth are preserved.
Hit Start
AVIF output, ~50% smaller than JPEG. Nothing is uploaded anywhere.
Feature highlights
ENCODE · RESIZE · STRIP · OUTPUT
Every control you need. Tuned to your workflow.
AVIF at the core, with JPEG/PNG fallbacks also available as outputs. Get fine-grained control over quality, dimensions, color profile, and metadata, per file.
Before/after file size and compression ratio are shown in the UI, so you can see exactly how much lighter the output gets, while you tune.
Encode
- AVIF75
- JPG75
- PNG—
Resize
Max 1920pxStrip metadata
EXIF · GPS · camera- GPS35°41'22"N · 139°41'30"E
- CameraCanon EOS R5 · RF 50mm F1.2 L
- Date taken2024:08:14 18:22:07
- ICC profileDisplay P3 · kept
Output
4032 × 3024SIDE-BY-SIDE · PIXEL LEVEL
Slide and compare. See the difference.
Drag the divider to compare original vs encoded output, frame-perfect. AVIF's strong compression is something you can commit to with confidence once you see it side by side.
Match JPEG's perceived quality at half the file size — or push past JPEG quality at the same size — and verify it with your eyes before writing.
POSITION · SIZE · OPACITY · OFFSET
Watermarks, baked right in.
Drop a logo, set a position, dial in opacity and size. Applied to every image in the batch — automatically.
Works on still and animated AVIF alike. Convert GIF/WebP animations into dramatically lighter animated AVIFs in the same pass.
Watermark
● On
- PositionBottom right
- Size32%
- Offset X / Y20 / 20 px
- Opacity55
Free to download
macOS 11+ · Apple Silicon native · 100% local processing
How it compares
| What you need | AVIF Converter. | WebP tool | libavif (CLI) | Online converter |
|---|---|---|---|---|
| Size reduction vs JPEG | ✅ ~50% | △ 25–35% | ✅ ~50% | △ Service-dependent |
| HDR / 10-12-bit depth | ✅ Preserved | ❌ 8-bit only | ✅ Preserved | ❌ |
| GUI workflow | ✅ | ✅ | ❌ Command line | ✅ |
| Images stay local | ✅ 100% local | Depends | ✅ | ❌ Server upload |
| Finder right-click integration | ✅ | △ | ❌ | ❌ |
| Price | Free + IAP | Free / paid | Free | Free / metered |
AVIF format snapshot
AVIF isn't just "smaller than JPEG" — it covers virtually every modern visual requirement in a single format.
| Capability | JPEG | WebP | AVIF |
|---|---|---|---|
| Compression at equal quality | Baseline | ~25–35% smaller | ~50% smaller |
| Transparency / animation | No | Yes | Yes |
| 10-bit / 12-bit depth | No | No | Yes |
| HDR / wide gamut | No | Limited | Full |
Browser support: Chrome (since 2020), Firefox (since 2021), Safari (macOS 13 / iOS 16+), Edge (since 2021). Use <picture> with AVIF → WebP → JPEG fallback to stay safe on older clients.
Free to download
macOS 11+ · Apple Silicon native · 100% local processing
Pricing
| Plan | What's included |
|---|---|
| Free | Bulk conversion to AVIF, drag & drop, Finder right-click integration. Everyday use is fully free. |
| In-app purchase / subscription | Quality control, resizing, before/after preview, watermarks, JPEG/PNG fallback output. See the App Store for current pricing. |
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.
Free to download
macOS 11+ · Apple Silicon native · 100% local processing
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.
Support
If you get stuck, find a bug, or want a new feature, send a note via the contact form below.Every message is read by the developer and feedback shapes the next update.
The app is free to start, so try it without commitment. If anything comes up, the developer is one click away.
Download
AVIF Converter. is free to start. Add the features you need via in-app purchase or subscription.
Free to download
macOS 11+ · Apple Silicon native · 100% local processing
Looking for WebP-only? WebP Converter.Want one app for everything? Image Tool+.