How to convert JPG to AVIF
- Click Choose files or drop your JPG images into the box above — up to 10 at a time on the free plan.
- Optionally set the quality — AVIF takes a few seconds per photo to encode.
- Conversion starts right away. Download each AVIF file, or click Download all to get them as one ZIP.
JPG vs AVIF
| JPG | AVIF | |
|---|---|---|
| Compression | Lossy | Lossy or lossless |
| Transparency | No | Yes |
| Animation | No | Yes |
| Colors | 8 bits per channel (16.7 million colors) | 8, 10 or 12 bits per channel, HDR |
| File size (photos) | Small | Smallest |
| Opens on | Everything: every browser, phone, computer, printer kiosk and photo app | Chrome 85+, Firefox 93+, Safari 16+; few desktop apps and editors |
| Best for | Photos you want to share, upload, email or print | The smallest possible web images with high quality |
About JPG and AVIF
What is JPG?
JPG (or JPEG) is the most widely used image format in the world. It compresses photos by discarding detail the eye barely notices, so a 12-megapixel picture fits in 2–5 MB. The trade-off is that every re-save loses a little more quality, and it cannot store transparency.
- Opens absolutely everywhere
- Small files for photographs
- Adjustable quality vs. size
- Lossy: quality drops a little with every re-save
- No transparency
- Blurry edges on text, logos and screenshots
What is AVIF?
AVIF is a modern image format based on the royalty-free AV1 video codec. It usually beats both JPG and WebP on file size — often around half of a comparable JPG — and supports transparency, HDR and wide color. Encoding it takes noticeably longer than JPG or WebP, and support outside web browsers is still limited.
- Best compression of any common format
- Transparency, HDR and wide color
- Royalty-free
- Slow to encode
- Limited support in desktop apps and editors
Why GlideConvert?
- Private by design. Your files are converted on your own device by your browser — they are never uploaded to a server. That keeps them private, avoids upload waits and means there is no queue.
- Fast. Images convert in a fraction of a second; video uses your device’s hardware encoder.
- Free. No sign-up, no watermark. 10 images, 5 audio files or one video at a time — Pro lifts the limits and removes ads.
Frequently asked questions
Will converting JPG to AVIF reduce quality?
AVIF uses lossy compression, but at the default quality of 90% the difference is practically invisible, even though the JPG was already compressed. Move the quality slider down for smaller files, or up to 100% for the best possible result.
Will the AVIF file be smaller than the JPG?
Usually yes — AVIF compresses photos more efficiently than JPG. The exact saving depends on the image and the quality you choose.
Why does AVIF take longer than other formats?
AVIF squeezes images much harder than JPG or WebP, and that takes more computing power — typically one to a few seconds per photo, a bit more on phones.
Can I convert several JPG images at once?
Yes. The free plan handles 10 images at a time, and you can download everything as a single ZIP. Pro removes the batch limit, converts files in parallel and supports files up to 4 GB.
Are my files uploaded to a server?
No. GlideConvert runs entirely in your browser: images are processed with the browser’s built-in codecs and WebAssembly, video and audio with hardware-accelerated WebCodecs (or a WebAssembly build of FFmpeg for older formats). Nothing is sent anywhere — you can even disconnect from the internet once the page has loaded.
Does it work on iPhone, Android, Mac and Windows?
Yes. It works in any up-to-date browser — Chrome, Edge, Safari, Firefox or Samsung Internet — on phones, tablets and computers, with nothing to install. On phones, extremely large images may be scaled down to fit within the browser’s memory limit; you will see a note if that happens.