What Is WebP Image Format?
WebP is a modern image format developed by Google that delivers smaller file sizes than JPEG and PNG at comparable quality. It supports both lossy and lossless compression, transparency, and animation in a single format. WebP images are typically 25 to 35 percent smaller than equivalent JPEGs, making pages load faster. Supported by all major browsers, WebP is now a standard choice for optimizing website photos and graphics.
- Developed by
- Google, first released in 2010 (Google)
- Size advantage
- About 25-35% smaller than JPEG at similar quality (Google)
- Capabilities
- Lossy, lossless, transparency (alpha), and animation
- Browser support
- All major browsers including Chrome, Firefox, Safari, and Edge
What is WebP and where did it come from? #
WebP is an image format created by Google and first released in 2010, designed specifically for the web. Its goal was to replace the aging trio of JPEG, PNG, and GIF with a single, more efficient format. WebP achieves noticeably smaller file sizes than those older formats while maintaining comparable visual quality, which means faster-loading pages and lower bandwidth use. It is versatile: a single format handles lossy compression for photographs, lossless compression for graphics, an alpha channel for transparency like PNG, and animation like GIF. For years, adoption was held back by inconsistent browser support, but that is no longer an issue; every major browser now displays WebP. As a result, it has become a default recommendation for web images and is flagged by Google's own PageSpeed tools when you are still serving older formats. For local business sites showcasing photos, WebP delivers professional image quality without the weight. We use it as standard in /services/web-design and convert existing libraries during /services/speed-optimization.
How much smaller is WebP than JPEG and PNG? #
WebP's headline benefit is file size. For photographs, lossy WebP is typically 25 to 35 percent smaller than a JPEG of equivalent visual quality, and sometimes more. For graphics with transparency, lossless WebP is usually meaningfully smaller than PNG, which is often bulky. Because images are the heaviest part of most pages, these percentages translate into real load-time savings, especially on image-rich pages and mobile connections. On a page carrying a megabyte of JPEGs, switching to WebP might shave 300 kilobytes or more without any visible quality change. Stacked with correct sizing and sensible compression levels, the cumulative effect is substantial. WebP is not the absolute smallest option, the newer AVIF format often beats it, but WebP has broader, longer-standing support and excellent tooling, making it the pragmatic default. For a local business, that means sharper galleries and hero images that still load quickly. Our /tools/website-grader flags images that could be served in a modern format, and /services/speed-optimization handles the conversion across your whole site.
WebP versus AVIF and other formats #
WebP is not the only modern image format, and choosing among them is a practical decision. AVIF, based on the AV1 video codec, generally produces even smaller files than WebP at the same quality, sometimes dramatically so, and it is now supported by all major browsers. However, AVIF encoding is slower and tooling is less mature, so WebP remains the safer, easier default for many sites, with AVIF used where maximum savings justify the effort. Compared with the older formats, WebP beats JPEG on size, beats PNG for most transparent images, and beats GIF for animation. SVG is a different animal entirely, a vector format ideal for logos and icons because it scales infinitely and stays tiny, and it should be preferred over any raster format for that purpose. The best strategy uses each format for its strength: WebP or AVIF for photos, SVG for logos and line art, and a fallback to JPEG for the rare old browser. We select formats per asset in /services/web-design and explain the broader tradeoffs in /wiki/what-is-image-compression.
Does WebP work in all browsers? #
Browser support was once WebP's main drawback but is no longer a concern. Chrome supported it from early on, and over time Firefox, Edge, Opera, and finally Safari all added support, so every major modern browser now displays WebP images natively. The remaining edge cases are very old browsers and some legacy systems, which represent a tiny and shrinking slice of traffic. Because of these rare exceptions, best practice is to serve WebP with an automatic fallback: the HTML picture element lets you offer WebP first and a JPEG or PNG to any browser that cannot handle it, so no visitor ever sees a broken image. Most WordPress plugins and image CDNs implement this fallback automatically, detecting the browser and serving the best supported format. For a local business worried about compatibility, this fallback approach removes the risk entirely. We configure automatic format serving with fallbacks in /services/managed-hosting and /services/wordpress-development, so you get WebP's speed benefits with universal compatibility and no manual work.
<picture>
<!-- Modern browsers get the smaller WebP -->
<source srcset="/img/storefront.webp" type="image/webp">
<!-- Older browsers fall back to JPEG -->
<img src="/img/storefront.jpg" alt="Storefront exterior"
width="1200" height="800" loading="lazy">
</picture>WebP and Core Web Vitals #
WebP contributes directly to better Core Web Vitals, chiefly Largest Contentful Paint. On many pages the largest visible element is a photograph, and serving it as a smaller WebP means it downloads and paints faster, improving LCP. Lighter images across the page also free bandwidth for other critical resources, helping the overall render. Google's PageSpeed Insights and Lighthouse explicitly recommend serving images in next-generation formats like WebP, and failing to do so shows up as an opportunity in your report. Converting to WebP is therefore one of the quickest, lowest-risk ways to lift a struggling page's loading score. It does not directly affect Cumulative Layout Shift, but as always you should pair images with width and height attributes to keep layout stable. Because the benefit is load-based, it appears immediately in lab tests rather than waiting weeks for field data. For local businesses failing Core Web Vitals largely on image weight, WebP conversion often moves the needle noticeably. See how it fits the full picture in /wiki/website-speed-guide and measure it with /tools/website-grader.
How do you convert images to WebP? #
Converting to WebP is straightforward and can be automated. On WordPress, image optimization plugins convert your entire existing library to WebP in bulk and automatically create WebP versions of every new upload, serving them with a fallback for old browsers. Many managed hosts and image CDNs do this at the server or edge level, converting and serving the best format based on the visitor's browser without any plugin. For hand-coded sites, build tools and command-line utilities convert images to WebP during deployment, and you wrap them in a picture element for fallback. Standalone converters and design tools also export WebP directly if you prefer to prepare images before upload. The key is consistency: convert the existing library once, then ensure new images are handled automatically so the site does not slowly revert to heavier formats. For most local businesses, an automated plugin or CDN approach is the least effort and most reliable. We set this up as part of /services/speed-optimization and /services/managed-hosting, and confirm every image is optimized using /tools/website-grader.
When should you not use WebP? #
WebP is an excellent default, but it is not right for every case. For logos, icons, and simple line art, SVG is superior because it is a vector format that scales to any size without losing sharpness and is usually smaller than any raster format including WebP. Do not convert a crisp vector logo to WebP; keep it as SVG. For images that must be printed at high resolution or edited repeatedly, keep a high-quality master in a lossless format and use WebP only for the web-facing display copy. If your audience includes a meaningful share of users on very old browsers or systems, ensure a robust fallback is in place, though this is rarely an issue today. Finally, WebP is not the smallest option, so if you are chasing absolute minimum size and can handle the tooling, AVIF may be worth the extra effort. In short, use WebP for web photographs and complex graphics, SVG for logos and icons, and keep lossless masters for source files. We make these format choices per asset in /services/ui-ux-design and /services/web-design.
WebP for local business websites #
For local businesses, WebP is one of the easiest wins available. Trades like roofers, landscapers, and remodelers rely on project galleries to prove their work, restaurants show food photography, and salons display before-and-after shots, all image-heavy content that would otherwise slow the site badly. WebP lets these businesses present high-quality visuals without paying the full speed penalty, keeping mobile visitors engaged where most local searches happen. Faster galleries mean lower bounce rates and more visitors reaching the booking or contact step, supporting the conversion goals we pursue in /services/conversion-optimization. Because local competition is often decided by which site is more usable rather than which has more content, a quick, sharp-looking site is a genuine edge. WebP also complements local SEO by helping page experience signals, working alongside /services/local-seo. We deploy WebP by default across industry builds like /web-design-for-roofers and /web-design-for-restaurants, so image-rich pages stay fast. Combined with compression and lazy loading, it keeps even photo-heavy local sites loading quickly on any device.
FAQ
What is WebP?
WebP is a modern image format from Google that produces smaller files than JPEG and PNG at comparable quality. It supports lossy and lossless compression, transparency, and animation in one format. Typically 25 to 35 percent smaller than JPEG, WebP helps pages load faster and is supported by all major browsers today.
Is WebP better than JPEG?
For web use, generally yes. WebP files are usually 25 to 35 percent smaller than JPEGs at similar quality, so pages load faster. WebP also supports transparency, which JPEG cannot. JPEG still works as a universal fallback for rare old browsers, which is why best practice serves WebP with a JPEG fallback.
Do all browsers support WebP?
All major modern browsers, including Chrome, Firefox, Safari, and Edge, now display WebP natively. Only very old browsers lack support, a tiny and shrinking share of traffic. Serving WebP through a picture element with a JPEG or PNG fallback ensures every visitor sees an image, removing any compatibility risk entirely.
What is the difference between WebP and AVIF?
Both are modern formats. AVIF often produces even smaller files than WebP at the same quality, but it encodes more slowly and has less mature tooling. WebP has broader, longer-standing support and easier workflows, making it the pragmatic default. AVIF suits cases where maximum savings justify the extra effort.
How do I convert my images to WebP?
On WordPress, an optimization plugin converts your whole library and every new upload automatically, with fallbacks. Many managed hosts and image CDNs convert and serve WebP at the server level. Hand-coded sites use build tools or converters. Automate it so the site does not slowly revert to heavier formats over time.
Should logos be saved as WebP?
No. Logos, icons, and simple line art should be SVG, a vector format that scales to any size without losing sharpness and is usually smaller than any raster format including WebP. Use WebP for photographs and complex graphics, and reserve SVG for logos and icons.
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