SoNice! Products · macOS · 100% local processing
Image conversion on Mac,
SoNice! makes three image converter apps for Mac — Image Tool+, WebP Converter., and AVIF Converter. — that batch-convert HEIC, PNG, JPG, and more to WebP or AVIF. All processing happens locally on your Mac. Your images never leave your machine.
Local processing
Images are never uploaded to the cloud
Batch processing
Drag and drop hundreds of images at once
Modern formats
HEIC · WebP · AVIF · JPEG XL
Native & fast
Built in Swift · Optimized for Apple Silicon
Pick the right tool for the job
Choose Image Tool+ to handle all your image processing in one app, WebP Converter. to convert images to WebP for your website, or AVIF Converter. to ship even smaller AVIF files.
For people who want one tool for everything.
An all-in-one image processing app with conversion, resizing, compression, watermarking, background removal, and renaming. With HDR and wide color gamut support, it's built for professional photo workflows.
- Exports to 10 formats: WebP, AVIF, JPEG XL, HEIC, PNG, JPG, and more
- Background removal, watermarking, renaming, metadata editing
- Preserves HDR and wide color gamut
For people who want to make their websites faster.
Bulk-convert PNG, JPG, GIF, and more to WebP. A focused tool for web developers and bloggers, built to directly improve LCP in Core Web Vitals.
- Batch-converts PNG, JPG, HEIC, and GIF to WebP
- Lossy / lossless and animated WebP
- Before/after comparison slider
Get ahead with the next-gen format.
Convert images to AVIF — about 50% smaller than JPEG, with HDR, wide color gamut, and 10/12-bit depth support. Adopt the future of image delivery today.
- Batch-converts PNG, JPG, HEIC, and WebP to AVIF
- About 50% smaller than JPEG, with HDR and 10/12-bit depth
- JPEG / PNG output for fallbacks
How the three apps compare
The three apps differ in how many formats they can export and which non-conversion features they include. All of them run entirely on your Mac and never upload your images.
| Item | Image Tool+ | WebP Converter. | AVIF Converter. |
|---|---|---|---|
| Main output | 10 formats incl. WebP, AVIF, JPEG XL, HEIC, PNG, JPG | WebP (plus PNG / JPEG) | AVIF (plus JPEG / PNG) |
| Batch convert, resize, watermark | ✅ | ✅ | ✅ |
| Background removal, renaming | ✅ | — | — |
| 100% local processing | ✅ | ✅ | ✅ |
Which one should you choose?
| If you... | We recommend |
|---|---|
| Process large volumes of images daily / Are a professional photographer or designer | Image Tool+ |
| Want to convert your blog or corporate site images to WebP | WebP Converter. |
| Want to deliver smaller, better-looking images with the latest format | AVIF Converter. |
| Need background removal and watermarking in one place | Image Tool+ |
Common technical foundations
All three apps are built with Swift / SwiftUI and run natively on Apple Silicon. They use Apple's image frameworks together with reference implementations such as libwebp and libavifto balance quality and speed.
Each app runs inside macOS's App Sandbox — a strong, OS-enforced security mechanism. The app can only access files you explicitly hand to it via drag-and-drop or a file picker. "Trust us" is replaced with "the OS won't allow otherwise."
An app for ZIP archives
Besides the image converters, we make ZipScope, an app for compressing and extracting archives. It keeps ZIPs you exchange with people on Windows free of garbled names and stray .DS_Store files, and lets you look inside archives without extracting them.
For anyone who swaps ZIPs with Windows users.
Shift_JIS ZIPs from Japanese Windows are detected and extracted with the right names. Use it from Finder's right-click menu and the menu bar; it never uses the network.
- ZIPs that open on Windows without garbled names (no .DS_Store or __MACOSX)
- Password-protected ZIP and 7z (Pro)
- Look inside ZIP, 7z, RAR, and LZH without extracting
A photo resizer for iPhone and iPad
For iPhone and iPad, we make Photo Batch, an app that resizes and converts photos in bulk. The user guide walks through it with screenshots.
Shrink your iPhone photos, all at once.
Photos are processed on the device and never uploaded. It's free to start, and the one-time Pro in-app purchase lets you import up to 100 photos at a time.
- Batch-resize photos to a max width or height
- Convert to JPEG, PNG, HEIC, WebP, and AVIF in one go
- Strip EXIF and location, and save to Photos with the original file names
More apps for iPhone and iPad
We also make Image Compare., for comparing two photos, and IP Address Bookmark., for checking and saving IP addresses. Image Compare. has a user guide with screenshots. IP Address Bookmark. has no page of its own here; its links go to the App Store.
See what changed between two photos.
Check before-and-after edits, what a retouch changed, or what changed between two screenshots. Images are never uploaded. Get the free Image Compare. or Image Compare+, the paid version without ads, on the App Store.
- Compare side by side, with a slider, by opacity, or by difference
- Line up two photos by dragging, pinching, and rotating with two fingers
- Save or share the difference image to Photos
Check your IP address in a tap.
Lists the IP address of each network you're connected to, such as Wi-Fi and cellular, and lets you save them.
- Shows the IP address (IPv4 and IPv6) of every network interface
- Save IP addresses and see where they are on a map
- Check from a widget, too
User guides
Each app has an official user guide with screenshots of the real app. Every guide also has a Japanese version.
| Guide | Platform | What it covers |
|---|---|---|
| Image Tool+ User Guide | Mac | Settings for each format (WebP, AVIF, JPEG XL, HEIC, and more), HDR conversion, resizing, the comparison preview, batch renaming, watermarks, presets, keyboard shortcuts |
| WebP Converter. User Guide | Mac | Converting to and from WebP, resizing, the comparison preview, batch renaming, watermarks, free version and upgrade |
| AVIF Converter. User Guide | Mac | Converting to and from AVIF, HDR conversion, resizing, the comparison preview, batch renaming, watermarks, free version and upgrade |
| ZipScope User Guide | Mac | Creating ZIPs that open without garbled names on Windows, password protection, extracting, viewing contents without extracting, fixing garbled names, Finder and menu bar |
| Photo Batch User Guide | iPhone and iPad | Batch-resizing photos, converting to JPEG, PNG, HEIC, WebP, and AVIF, EXIF and location, presets, saving to Photos, free and Pro |
| Image Compare. User Guide | iPhone and iPad | Comparing side by side, with a slider, as an overlay, and by difference, lining two images up, saving the difference image, free version and Image Compare+ |
Related guides
These guides walk through image conversion on a Mac and explain how to choose a format.
- How to batch convert PNG and JPG to WebP on a Mac
- How to convert transparent PNG to WebP on a Mac
- How to batch convert images to AVIF on a Mac
- How to batch convert HEIC to JPG, PNG, or WebP on a Mac
- How to batch convert iPhone HEIC photos to WebP on a Mac
- How to batch convert images to JPEG XL on a Mac
- WebP vs AVIF: which image format should you use?
- What is an HDR image? Gain maps, PQ/HLG, and converting on a Mac
- How to share HDR photos on social media, and which platforms support them
These guides explain how to measure lengths and areas on drawings.
- How to calculate floor area from a floor plan (3 ways)
- How to measure dimensions on a PDF drawing for free (4 ways)
These guides cover garbled file names and passwords in ZIPs made on a Mac.
- Why ZIPs made on a Mac show garbled file names on Windows (3 fixes)
- How to create a password-protected ZIP on a Mac that opens on Windows
FAQ
QWebP or AVIF — which should I pick?
<picture> with AVIF first, WebP second, and JPEG/PNG as the final fallback. AVIF-capable browsers get ~50% smaller files, WebP-capable browsers get ~30% smaller files, and older clients still see a normal image. If you have to choose one: WebP Converter. for broad compatibility, AVIF Converter. for maximum savings.QHow is Image Tool+ different from the other two?
QIs everything really local?
Web tools you can use in the browser
We also offer free tools that need no installation and run entirely in your browser.
Batch convert HEIC, JPEG XL, AVIF, and more right in your browser.
Batch convert HEIC (including HDR), JPEG XL, AVIF, WebP, PNG, and JPG with custom resizing, quality, renaming, and watermarking. 100% private & client-side without uploading to any server.
For anyone who needs to measure length and area from a drawing.
Load a PDF or image drawing, match the scale, and measure length, floor area, and wall area to scale. Overlay furniture rectangles and notes too — a free, fully in-browser tool.
