Convert images to AVIF
Convert whatever you have — JPG, PNG, WebP, HEIC — into AVIF, the format that packs the most quality into the fewest bytes. It all happens in your browser: drop images in, get AVIF out, upload nothing.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
The smallest modern format
AVIF, built on the AV1 codec, is currently the most efficient widely-available image format: at the same perceived quality it routinely beats JPG by half and edges out WebP too. That makes it the format to reach for when page speed and bandwidth matter most — hero images, galleries, anything served at scale. Point this converter at a mixed folder and every image comes back as a lean AVIF.
One format in, AVIF out
You don’t need to pre-sort by type: JPG photos, PNG graphics with transparency, WebP downloads and iPhone HEIC files all convert in the same batch, with alpha and wide color preserved. Check browser support for where the AVIF will live — it’s broad now but not universal — and keep a JPG or WebP fallback if you need one. The whole conversion runs locally, so nothing you convert is ever uploaded.
Frequently asked questions
- Which formats are supported?
- You can convert to and from JPG, PNG, WebP, AVIF and BMP, and convert from HEIC/HEIF (iPhone photos). Browsers cannot create HEIC files, so HEIC is input-only. Output formats your browser cannot encode are detected and disabled automatically.
- Can I convert HEIC to JPG?
- Yes. Drop in a HEIC photo from an iPhone and choose JPG (or PNG/WebP). The HEIC file is decoded locally in your browser with a bundled decoder — it is never uploaded anywhere.
- Is transparency preserved?
- Yes, when converting to a format that supports an alpha channel (PNG, WebP, AVIF). For formats without transparency (JPG, BMP), you can pick a background color for transparent areas.
- Is my image uploaded?
- No. Conversion runs entirely in your browser — your images never touch a server.
- What is AVIF and should I use it?
- AVIF produces the smallest high-quality files. Encoding support varies by browser, so PixelVault enables it only when your browser can create AVIF files.
- Can I convert many images at once?
- Yes. Batch-convert a whole folder of images and export them together as a ZIP.