.jpg.avif
How to Convert JPG to AVIF
To convert JPG to AVIF, drop your JPG above, choose AVIF, and download a file roughly half the size with no visible quality difference. AVIF's AV1-based compression is the current state of the art, and every modern browser renders it. It's the format of choice when page speed is a priority and you're serving users on current devices.
This page is part of the Image Converter hub, which covers every image format pair JoltFile supports.
AVIF encoding depends on your browser's canvas support.
In-browser image limit: 100 MB per file
Browser-based processing — your files never leave your device
Need files over 100 MB, batch conversion, or keyboard shortcuts?
JoltFile desktop appHow to convert JPG to AVIF in 5 steps
The whole process takes under two minutes and requires no software installation or account. Your original JPG file is never modified.
Upload your JPG file
Drag your .jpg file onto the converter above, or click “Browse files” to select it from your device. Files are processed locally in your browser whenever possible — nothing is uploaded to a server.
Confirm the output format is AVIF
The converter defaults to JPG → AVIF on this page. If you dropped in a different file type, set the target format to AVIF (.avif) using the format menu.
Adjust quality settings
Choose your quality settings. For photos, quality 90 is visually indistinguishable from the original; graphics with text or transparency should use the lossless option when available.
Convert the file
Click “Convert”. JoltFile processes the file and shows a progress indicator — most image conversions finish in a few seconds.
Download your AVIF file
Save the converted .avif file to your device. The original JPG file is never modified, and temporary data is discarded automatically.
What happens to quality when converting JPG to AVIF?
Re-encoding a lossy JPG into lossy AVIF compounds compression slightly, but AVIF's efficiency means you can use high quality settings and still cut the file size by ~50%. Photos with smooth gradients benefit most, since AVIF's 10/12-bit pipelines avoid the banding JPG introduces.
When should you convert JPG to AVIF?
- Modernizing photo assets for Core Web Vitals gains
- Building responsive image sets with AVIF + JPG fallback
- Reducing CDN and storage spend on large photo catalogs
- Preparing HDR photos for modern display pipelines
JPG vs AVIF: format comparison
| Property | JPG | AVIF |
|---|---|---|
| File extension | .jpg | .avif |
| Full name | JPEG (Joint Photographic Experts Group) | AV1 Image File Format |
| Compression | Lossy (DCT-based) | Lossy or lossless (AV1-derived) |
| Transparency | Not supported | Supported |
| MIME type | image/jpeg | image/avif |
| Introduced | 1992, by Joint Photographic Experts Group | 2019, by Alliance for Open Media |
| Best for | Photographs, web imagery, email attachments, and anywhere small size beats perfect fidelity | Performance-critical web imagery on modern browsers |
About the JPG and AVIF formats
What is JPG? (JPEG (Joint Photographic Experts Group))
JPG (JPEG) is the most widely used lossy image format, standardized in 1992. It achieves 10:1 or greater compression on photographs by discarding detail the human eye barely notices, which is why virtually every camera and phone shoots JPEG by default.
Strengths
- Very small files for photographic content
- Supported by literally every device, browser, and app
- Adjustable quality/size trade-off
- Fast to decode on any hardware
Limitations
- Lossy — quality degrades with every re-save
- No transparency support
- Visible artifacts around text and sharp edges
What is AVIF? (AV1 Image File Format)
AVIF is a next-generation image format based on the AV1 video codec, standardized by the Alliance for Open Media in 2019. It routinely produces files 50% smaller than JPEG at similar visual quality and supports HDR, wide color gamut, transparency, and animation.
Strengths
- Best-in-class compression — often ~50% smaller than JPEG
- HDR and 10/12-bit color depth support
- Transparency and animation support
- Royalty-free and open
Limitations
- Encoding is computationally slow
- Support in older browsers and desktop editors is still patchy
- Some social platforms and email clients reject it
JPG to AVIF conversion: your questions answered
How much smaller is AVIF than JPG?
Independent benchmarks consistently show AVIF at about 50% of JPEG's size at matched visual quality — sometimes better on complex photos, thanks to AV1's larger transform blocks and better prediction.
Will my AVIF files open everywhere?
In all current browsers, yes (Chrome, Firefox, Safari 16.4+, Edge). Desktop and legacy software support is patchier — keep JPG fallbacks for email and older apps.
Does converting JPG to AVIF improve the image?
No format conversion can add detail back. What AVIF does is keep the same visible quality in roughly half the bytes.
Is it free to convert JPG to AVIF with JoltFile?
Yes. JoltFile's free tier covers everyday JPG to AVIF conversions with no account and no watermarks. Higher file-size limits and batch processing are planned for the upcoming Pro tier.
Is my JPG file private when I convert it?
Yes. JoltFile is designed around browser-based processing: whenever technically possible your file is converted locally on your own device and never uploaded to a server. Files that do require server processing are encrypted in transit and deleted automatically after conversion.
FAQ provided by JoltFile.