Convert PNG to AVIF — Transparency Preserved
Shrink PNG screenshots by 60–85% and PNG photos by up to 98% without losing transparency. Full 8-bit alpha channels survive the conversion. Runs entirely in your browser.
In-browser PNG → AVIF conversion
Drop PNG files below. The engine preserves full alpha transparency, picks lossy or lossless AVIF per image based on content analysis, and copies your ICC color profile across into the AVIF container.
Supported input formats
- ✓ JPG / JPEG — Photos, portraits, web content
- ✓ PNG — Screenshots, icons, transparent images
- ✓ HEIC / HEIF — iPhone photos, Apple formats
- ✓ TIFF — Scans, prints, high-resolution archives
- ✓ GIF — Animations and static GIFs
- ✓ BMP, PSD & more — Anything ImageMagick can decode
How the conversion works
- 1. DropDrag files or a whole folder into the box below. Folder structure is preserved in the output ZIP.
- 2. AnalyzeEach image is analyzed for entropy and content type. The engine picks per-image quality settings targeting PSNR ≥ 44.5 and SSIM ≥ 0.95.
- 3. EncodeConversion runs on all of your CPU cores in parallel via Web Workers. EXIF, ICC color profiles and geolocation are copied onto the WebP or AVIF output.
- 4. DownloadWhen the batch is done, a ZIP containing every converted file downloads automatically. No re-upload, no waiting on a server.
PNG → AVIF, without the caveats
PNG is perfect for lossless graphics and terrible for photos. AVIF handles both — and drives files smaller than PNG or WebP.
PNG photos are the worst case for the web
PNG uses DEFLATE compression — great for flat graphics, terrible for photographs. A 12-megapixel PNG photo often hits 15–30 MB on disk. The same photo as AVIF typically lands between 250 KB and 1 MB with no visible quality loss. Savings of 90–98% are routine on photographic PNGs, and 50–75% on screenshots.
Transparency is preserved — at full 8-bit alpha
AVIF supports the same 8-bit alpha channel that PNG uses — 256 levels of transparency, with full semi-transparent pixel support for anti-aliased edges, soft shadows and blur effects. SciZone detects alpha in your PNG and routes it through libavif's YUV+Alpha pipeline so the edges of logos, icons and UI mockups stay clean.
Screenshots and UI captures: lossless AVIF
For flat imagery — browser screenshots, app UIs, design mockups — the engine can switch to AVIF's lossless mode when it produces a smaller file than lossy at the quality target. You don't pick; the engine measures. The result is a file that's pixel-identical to the source but significantly smaller than the source PNG.
ICC color profiles carry over
If your PNG carries an ICC profile (from Photoshop export, Procreate, or a calibrated scanner), SciZone extracts it during decoding and embeds it into the AVIF output via libavif's ColourInformationBox. Calibrated displays see identical colors before and after.
PNG vs AVIF at a glance
| Criterion | PNG | WebP |
|---|---|---|
| Typical file size (photos) | 100% | 2–10% |
| Typical file size (screenshots) | 100% | 15–40% |
| Transparency (alpha) | Yes, 8-bit | Yes, 8-bit — identical |
| Lossless mode | Yes (only mode) | Yes (optional) |
| Lossy mode | No | Yes — huge savings |
| HDR / wide-gamut color | Limited | Native (10/12-bit) |
| Browser support | Universal | ~95% (Chrome 85+, Firefox 93+, Safari 16.4+) |
How to convert PNG to AVIF
Four steps, fully offline, transparency intact.
- 1
Drop your PNG files
Drag PNG files or a folder of mixed PNGs onto the drop zone below. Transparent backgrounds are detected and preserved automatically.
- 2
Alpha channel detection
The engine inspects each PNG, detects whether it has an alpha channel, and routes it through libavif's YUV+Alpha or YUV pipeline accordingly.
- 3
Adaptive AVIF encoding
Photographic PNGs get lossy AVIF encoding tuned to PSNR/SSIM targets. Flat UI screenshots fall back to lossless AVIF when that produces a smaller file at the same quality target.
- 4
Download the ZIP
Your converted .avif files download as a ZIP when the batch is done. Transparent pixels remain transparent; color profiles remain embedded.
AVIF Results
AVIF matches WebP quality (SSIM Δ < 0.005) while shipping ~45% smaller files on the same Excellent preset.
Typical AVIF savings
Measured on 24 diverse photos at matched perceived quality (SSIM ≥ 0.95)
PNG to AVIF — Frequently Asked Questions
Will my PNG's transparent background be preserved in AVIF?
Yes, completely. AVIF supports the same 8-bit alpha channel as PNG. Transparent pixels stay transparent, and semi-transparent pixels (anti-aliased logo edges, drop shadows, blurred UI elements) stay semi-transparent with no visible quality loss.
How much smaller will my PNG screenshots get in AVIF?
For typical browser screenshots and UI captures, expect 60–85% reduction. For PNG photos (which should never have been saved as PNG in the first place), the reduction is often 92–98%. SciZone shows the exact savings per file and can keep the original if AVIF output happens to be larger on a given input.
Should I use lossless or lossy AVIF for my PNG?
SciZone picks for you. The engine analyses entropy and content type: flat UI imagery falls back to lossless AVIF when that's smaller, while photographic PNGs go through tuned lossy AVIF. You don't need to choose.
Does AVIF work in all browsers?
All major modern browsers support AVIF: Chrome 85+, Firefox 93+, Safari 16.4+ (iOS and macOS), Edge, Opera. Roughly 95% global support. For maximum reach (older iOS Safari, in-app browsers), convert to WebP instead using the toggle above the drop zone.
Does PNG→AVIF conversion work on mobile browsers?
Yes on iOS 16.4+ Safari, Android Chrome, Samsung Internet, Firefox. The WebAssembly engine is the same everywhere; mobile devices use fewer parallel workers because they have fewer CPU cores.
Can I batch convert a folder of PNG files to AVIF?
Yes. Drop the whole folder onto the drop zone; the folder structure is preserved inside the output ZIP. There's no batch size limit. For very large runs keep in mind AVIF is noticeably slower to encode than WebP.
Does the converter strip PNG metadata?
No. SciZone extracts ICC color profiles, EXIF (from eXIf chunks) and text chunks where AVIF supports the equivalent, then embeds them inside the AVIF container via libavif's metadata API. The goal is fidelity, not sanitization.
Is APNG (animated PNG) supported?
The current release decodes the first frame of APNG files. Full animated APNG→AVIF sequence conversion is planned but not yet enabled — for animated content today, convert via a video workflow.
Why Choose SciZone?
We're not just another optimizer. We engineered a fundamentally better solution.
| Feature | SciZone (You're here) | Other Optimizers |
|---|---|---|
| CPU Utilization
How processing power is used
| True Multi-Threading Intelligently uses all CPU cores without overloading your system | Single-Threaded Uses only one CPU core, wastes available power |
| Quality Settings
How compression is optimized
| Unique Per Image Algorithm analyzes each photo and picks optimal settings | One-Size-Fits-All Same settings for every photo, inconsistent quality |
|
Metadata & Color Profiles
Preservation of image data
| Fully Preserved EXIF, color profiles, geolocation. Everything stays intact | Often Stripped Color profiles lost, metadata incomplete |
|
Quality-Size Balance
Optimization results | Perfect Balance Maximum compression with imperceptible quality loss | Inconsistent Either too large or noticeable quality loss |
The Bottom Line
Every photo is unique. Our intelligent algorithm understands this and analyzes each image individually to find the perfect balance between file size and quality. We utilize your computer's full power without overloading it, preserving every detail of your metadata and color profiles. Your files are smaller, faster, and absolutely perfect. 🎯