The web image landscape has settled into a clear hierarchy. JPEG and PNG are legacy formats that still dominate by volume. WebP is the established modern default. AVIF is the performance leader gaining ground steadily. And JPEG XL, once the most promising candidate, has been sidelined by browser politics.
This article takes stock of where each format stands in 2026, backed by adoption data, browser support numbers, and practical implications for anyone building for the web.
Where We Stand | Format Adoption Data
According to HTTP Archive data from early 2026, the distribution of image formats on the web's top sites looks like this:
| Format | Usage (top 1M sites) | Trend |
|---|---|---|
| JPEG | ~55% | Declining slowly |
| PNG | ~25% | Stable |
| WebP | ~52% | Growing |
| AVIF | ~14% | Growing fast |
| GIF | ~8% | Declining |
| SVG | ~12% | Stable |
Note: percentages exceed 100% because many sites serve multiple formats via <picture> or content negotiation. A site can serve both JPEG and WebP depending on browser support.
The trend is clear: WebP has crossed the majority threshold and is now the most commonly served modern format. AVIF adoption is accelerating, roughly doubling each year since 2023. JPEG remains ubiquitous but is increasingly used as a fallback rather than the primary format.
AVIF | From Newcomer to Mainstream
AVIF's journey from experimental format to production-ready standard has been defined by one event: Safari 16.4 adding support in March 2023. Before that, AVIF was risky to deploy because any site with significant Apple traffic needed a fallback. After Safari's adoption, the last major barrier fell.
Where AVIF stands in 2026:
- Browser support: 93% globally, covering Chrome, Firefox, Safari, Edge, and all major mobile browsers.
- Adoption: ~14% of top sites, up from ~2% in 2023.
- Encoding speed: still the main drawback. AVIF encoding is 5 to 10x slower than WebP, which limits adoption in dynamic image pipelines.
- Compression advantage: 20 to 30% smaller than WebP, 40 to 55% smaller than JPEG at equivalent quality. This advantage holds consistently across photographic content.
AVIF's growth is driven by two forces: the compression advantage is too large to ignore for performance-focused sites, and the <picture> element makes adoption risk-free since WebP or JPEG fallbacks handle unsupported browsers.
The encoding speed issue is real but diminishing. Hardware-accelerated AVIF encoding is becoming more common, and for static assets (the majority of web images), encoding speed is irrelevant because images are encoded once and served many times.
WebP | The Established Standard
WebP has completed its transition from "modern alternative" to "default web format." With 97% browser support and adoption on over half of top sites, it is the safe choice for any project.
Why WebP won the adoption race:
- Google's influence. WebP was developed by Google and promoted through Lighthouse, PageSpeed Insights, and Chrome. Google's tooling actively recommends WebP, which drives adoption.
- Encoding speed. WebP encodes fast enough for dynamic pipelines, which means CMSs, image CDNs, and on-the-fly conversion services can use it without performance concerns.
- Good enough compression. WebP is 25 to 35% smaller than JPEG. For most sites, this is sufficient to pass Core Web Vitals thresholds without needing AVIF's additional savings.
- Feature set. Lossy, lossless, alpha, animation. WebP handles every use case that previously required separate JPEG, PNG, and GIF files.
WebP's position is secure. Even as AVIF grows, WebP will remain the fallback format and the default choice for dynamic pipelines for the foreseeable future.
JPEG and PNG | Still Everywhere
JPEG and PNG are not going away. They remain the universal baseline, supported by every browser, email client, operating system, and image tool ever made.
JPEG in 2026: still served by over half of all sites, but increasingly as a fallback inside <picture> elements rather than the primary source. JPEG remains the correct choice for email attachments, Open Graph images, and any context where maximum compatibility matters more than file size.
PNG in 2026: stable at about 25% usage, primarily for screenshots, diagrams, icons, and images that require lossless quality or transparency in contexts where WebP is not supported. PNG's role has narrowed, but it is not replaceable in its niche.
The main risk with JPEG and PNG is inertia. Sites that have not migrated to modern formats are leaving significant performance gains on the table. A site serving JPEG where it could serve WebP is paying a 25 to 35% bandwidth tax on every image load.
JPEG XL | The Format That Almost Was
JPEG XL deserves a mention because it was, on paper, the best image format ever designed. It offered compression equal to or better than AVIF, faster encoding than WebP, lossless JPEG recompression (shrink existing JPEGs by 20% with zero quality loss), progressive decoding, and a feature set that covered every use case.
Then Chrome removed its experimental support in late 2023, citing insufficient ecosystem interest and the costs of maintaining another image decoder. Firefox never shipped it beyond a flag. Safari added support in version 17, but Safari alone is not enough to build a web format ecosystem.
JPEG XL in 2026:
- Supported in Safari 17+ only (~18% of browsers).
- Not supported in Chrome, Firefox, or Edge.
- Used in some desktop imaging applications (macOS, Adobe products).
- Not viable as a web format without Chrome support.
The JPEG XL situation is a case study in how browser vendor decisions shape the web platform. Technical superiority alone does not guarantee adoption. Without Chrome, JPEG XL cannot reach the critical mass needed for web deployment.
What Comes Next?
The near-term future is predictable: AVIF adoption will continue growing, WebP will remain the baseline modern format, and JPEG/PNG will slowly decline as fallback usage.
Longer term, several developments are worth watching:
Hardware AVIF encoding. As GPUs and dedicated media processors add AVIF encoding support, the encoding speed gap will close. This will make AVIF viable for dynamic pipelines and accelerate adoption.
AV2 and a possible AV2-based image format. The Alliance for Open Media is developing AV2, the successor to AV1. An AV2-based image format could offer another compression leap, but it is years away from browser shipping.
JPEG XL revival. There is ongoing community pressure to reconsider JPEG XL in Chromium. Whether this leads to implementation depends on Google's priorities, but the technical case remains strong.
AI-based compression. Neural image compression research is producing codecs that outperform traditional approaches by significant margins. These are not yet practical for real-time web delivery, but the technology is advancing rapidly.
For developers building sites today, the practical advice is straightforward: serve AVIF with WebP fallback via <picture>, and do not wait for the next format revolution. The tools available now are more than good enough.
Convert Your Images
Morphix converts JPG and PNG images to WebP and AVIF directly in your browser. No registration required for the free plan.