WebP vs AVIF in 2026: Which Should Your Product Images Actually Use?

Think picking WebP means you’re done? In 2026 AVIF squeezes images even smaller — but in the wrong place, it can backfire on your first screen.

Last month I ran an image audit for an independent fashion store. The owner had already converted every product photo to WebP and PageSpeed was green. When I converted just the hero image to AVIF, the same file got 26% smaller — yet on a low-end Android phone, the first screen actually decoded slower. AVIF’s pricier decoding ate into the bytes it had just saved.

This isn’t an article about which format is “more advanced.” It answers one question: when should your product images use AVIF, and when should they not?

At a Glance: Same Image, Four Formats

Benchmark: one 2.4MB JPEG product photo (the same test source we’ve published before).

Format	Size	vs Original	Visual Quality	Encoding Time	Browser Support
Original JPEG	2.4 MB	—	100%	—	100%
JPEG (Q85)	380 KB	84% smaller	Excellent	Fast	100%
WebP	175 KB	93% smaller	Excellent	Baseline	96%+
AVIF	130 KB	95% smaller	Excellent	5-10x slower	92%+ (full in Safari 16.4+/iOS 16.4+)

Two takeaways: ① WebP alone already shrinks an image to a fraction of the JPEG; ② AVIF is roughly 26% smaller than WebP, but encoding is 5-10x slower and decoding is heavier on the CPU. Every section below is about when that trade-off is worth it.

01. WebP: Still the Safe Default in 2026

WebP is the “you can’t go wrong” choice: full support in Chrome, Firefox, Edge and Safari — 96%+ browser coverage; fast encoding, so batch runs of a few hundred images are painless; and Shopify, WooCommerce and most CMS backends accept it natively.

One thing people get wrong: Shopify’s CDN automatically serves a WebP (and, to supported browsers, an AVIF) variant of the image you upload — but only of what you upload. If your source file is an uncompressed 2.4MB JPEG, the CDN is really serving “a compressed JPEG re-encoded as WebP,” still landing around 300-400KB. Compress the source to a 175KB WebP before uploading, and that’s the tier the CDN delivers.

In one line: the CDN won’t compress for you — compression happens at the source.

02. AVIF: The Compression Ceiling, With 3 Real Costs

AVIF uses AV1 video encoding for still images and is currently the compression ceiling. On the same product photo it’s another 20-30% smaller than WebP. But “smaller” isn’t “better” — three costs rarely get mentioned:

① Encoding is 5-10x slower. The AV1 encoder trades compute for compression. You won’t feel it on one image, but on a batch of 200 it’s the difference between a few minutes and tens of minutes. That’s why AVIF suits “a few, done carefully” — not “the whole site, blindly.”

② Decoding is heavier — low-end phones can stutter. AVIF decoding demands more from the CPU/GPU. A smaller image doesn’t always mean a faster page: if your LCP image is an AVIF and the visitor is on a two-year-old budget Android, decode time can eat the download savings and push LCP up.

③ Safari support has a threshold. Full support only arrived in Safari 16.4 / iOS 16.4 (roughly 2023 onward). Overall coverage is already 92%+, but older Safari builds don’t understand AVIF at all — you need a WebP/JPEG fallback or the image breaks.

Remember AVIF’s precondition: you can ship a fallback, and you can measure real first-screen decoding.

03. Decision Matrix: Default to WebP, Use AVIF for Heroes

Applying those costs to real scenarios makes the call obvious:

Image type	Recommendation	Why
Above-the-fold hero / full-width banner	AVIF + WebP fallback	Biggest single-image payoff — worth the encoding and fallback for one file
Shopify store source images	WebP	Shopify doesn’t need (and largely won’t let you directly feed) AVIF sources; its CDN renders AVIF to capable browsers
Product main / detail images	WebP	Large volume; AVIF’s slow encoding cost lands here. WebP captures nearly all the gain
Thumbnails / listing images	WebP	Too small for AVIF to matter, and decoding is a bad deal at that size
Full-screen mobile image	Test it	If low-end phones stutter, fall back to WebP — decide on LCP data

Hero template for self-hosted sites and anyone who can edit their theme:

<picture>
  <source type="image/avif" srcset="hero.avif">
  <source type="image/webp" srcset="hero.webp">
  <img src="hero.jpg" width="1600" height="900" alt="Hero image"
       loading="eager" fetchpriority="high">
</picture>

Capable browsers grab the 130KB AVIF; older Safari silently falls back to WebP/JPEG. Nobody gets a broken image.

👉 For the 90% of product images that are fine as WebP: batch-convert them in one pass with TinyOpt’s online tool (pure local, nothing uploaded). For the handful of heroes you want to squeeze harder, run a separate AVIF pass in the desktop app.

04. The Math at Scale: 200 Product Images

Blow the single-image numbers up to a realistic product catalog — 200 photos, ~500KB each, roughly 100MB total — using our published batch test plus the same single-image baseline:

Processing	Per image	200 images	Notes
Original JPEG	~500 KB	~100 MB	Source files
TinyOpt batch → WebP	90-120 KB	~20 MB	Published real batch-test figures
Everything → AVIF (estimate)	~70-90 KB	~15-18 MB	Linear estimate from the single-image baseline; not a re-run

Two numbers say it all: batch WebP already cuts ~80% of the traffic; AVIF saves another ~20% on top — at 5-10x the encoding time, plus the compatibility and decoding risk.

So the engineering call is obvious: instead of converting all 200 images to AVIF and betting on the risks, convert 195 to WebP and 5 heroes to AVIF. Nearly the same bytes saved, a fraction of the trouble.

👉 Want to reproduce that gap on your own files? Drop your slowest product images into the TinyOpt desktop app and run a WebP pass first — watch the total drop.

05. Your Images Stay Yours: No Cloud Library Required

Beyond the format choice, there’s a question people skip: where do your files go while they’re being processed?

• Online tool (truly local): our web tools encode in your browser via WebAssembly + Canvas. Files never leave your device. No account, no API key. Don’t take our word for it — open the browser Network panel while you work: after the page finishes loading, no new requests go out.
• Desktop app (local control + process-and-delete): when you batch-compress or produce AVIF, files go to the official TinyPNG API only for processing and are deleted right after — nothing is stored. API keys live only in a local config file. If you hit your quota, a local engine takes over offline. Output files land on your own disk.

Now compare ShortPixel or Cloudinary: they want your whole image library inside their cloud CDN, auto-delivering formats per browser. File flow and portability are out of your hands. With TinyOpt — web tool or desktop — your originals and your results stay with you. Compression is a one-shot, process-and-delete job, not a hosting relationship.

👉 Test 10 images with zero upload: open TinyOpt Batch Compress. For large batches or AVIF output: download the desktop app.

FAQ

01. Does Safari support AVIF now?

Yes — Safari 16.4+ / iOS 16.4+ (systems from early 2023). Older Safari builds don’t recognize AVIF, so keep a WebP/JPEG fallback.

02. Can AVIF be my only format?

Not recommended. It’s only ~20-30% smaller than WebP, and it brings slow encoding, heavier decoding and older-Safari gaps. For most sites, site-wide WebP plus a few AVIF heroes is the sweet spot.

03. Will slow AVIF encoding delay my launch?

Only if you use it for a few hero images, where the time is negligible. Don’t put it on hundreds of product shots — that’s paying ten times the processing for a ~20% bandwidth saving.

04. Can my Shopify store use AVIF?

Yes, but you don’t convert anything yourself. Upload WebP sources and Shopify’s CDN renders AVIF variants for capable browsers, falling back to WebP for everyone else. Let the CDN own the compatibility headache.

05. My first screen got slower after AVIF. What’s going on?

Almost certainly a low-end phone decoding AVIF slowly. AVIF saves transfer time but can spend it on decode time. Put the LCP image back on WebP and decide with PageSpeed/Lighthouse data.

Summary

The 2026 answer isn’t “AVIF is newer, so it’s better.” It’s: default to WebP, use AVIF for heroes. Site-wide WebP captures the bulk of the gain with zero risk; a few carefully encoded hero images squeeze out the last bit.

Download TinyOpt Compressor, compress the 10 images on your slowest product page first, and let real numbers decide whether your heroes earn an AVIF pass.

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Related: JPEG vs WebP vs AVIF for E-Commerce: Which Format Boosts Sales? · 9 Image Format Benchmark: JPEG, PNG, WebP, or AVIF?