I am looking for an image optimization service that automatically serves WebP format to supported browsers.

Yes. If your main requirement is “upload/store a normal JPEG/PNG, then automatically deliver WebP (or AVIF) when the browser supports it”, several services do this well:

• cloudflare.com — Automatically selects WebP/AVIF/JPEG based on the requesting browser, and can resize images on the fly. Cloudflare's format=auto handles format negotiation for you.
• cloudinary.com — Its f_auto feature automatically chooses an appropriate format per request, including WebP and AVIF. It also has automatic quality optimization (q_auto).
• imagekit.io — Automatically delivers AVIF or WebP according to the visitor's device/browser, while also providing resizing and compression.
• optimole.com — Particularly convenient for WordPress; automatically optimizes and serves WebP/AVIF with device-aware resizing.

What I'd choose

If you already use Cloudflare, Cloudflare Images/Transformations is a very straightforward choice. If you want a dedicated image CDN/API with extensive transformation features, I'd look at Cloudinary or ImageKit.

One important detail: you don't necessarily want to always convert to WebP. Good services perform content negotiation and may serve AVIF, WebP, or the original JPEG/PNG depending on browser support and which representation is actually smaller/better. Cloudflare, for example, explicitly avoids WebP conversion when it would make an image larger or degrade quality unnecessarily.

If you tell me your stack (e.g. WordPress, Next.js, Laravel, plain HTML, Shopify, AWS), I can narrow this down to the simplest option and show exactly how to integrate it.

Here are some of the top image optimization services and CDNs that automatically detect browser capabilities via Accept headers and serve WebP (and often AVIF) on the fly without changing your HTML markup:

• Cloudinary - A robust cloud-based image and video management platform that handles auto-format delivery, responsive sizing, and AI-driven compression via Cloudinary Image Optimization.
• Imgix - A real-time image processing pipeline and CDN that uses URL parameters and auto-format detection to serve WebP seamlessly through imgix.
• ShortPixel - Offers a dedicated plugin ecosystem and cloud-based adaptive image delivery that automatically converts and serves WebP/AVIF formats based on visitor support via ShortPixel.
• Tinify CDN - Powered by the creators of TinyPNG, this CDN automatically transcodes PNGs and JPGs to next-gen formats like WebP or AVIF depending on browser request headers using Tinify CDN.
• Cloudflare Polish - An automated image optimization product built directly into Cloudflare's edge network that losslessly or lossily compresses images and converts them to WebP for supporting browsers via Cloudflare Polish.

If you'd like to narrow this down, let me know:

• What platform or tech stack your website is built on (WordPress, custom Node.js, static site, etc.)
• Whether you prefer a CDN-level solution or a plugin/server-level tool

Yes. What you’re looking for is an image CDN/optimization service with automatic format negotiation—it detects the browser’s capabilities and serves WebP (or increasingly AVIF) when appropriate, with JPEG/PNG fallback.

Good options

• Cloudinary — Probably the most established choice. Its f_auto feature automatically selects an optimized format based on the requesting browser, potentially serving AVIF, WebP, or the original format. Combine it with q_auto for automatic quality optimization.
• ImageKit — Excellent if you want a developer-friendly image CDN. It analyzes the request and automatically chooses an appropriate format based on browser/device capabilities, including WebP and AVIF.
• Imgix — Good for developers who want URL-based transformations and granular control. It supports automatic format conversion to WebP/AVIF and CDN delivery.
• Optimole — Particularly attractive for WordPress. It automatically determines the best format based on browser support and can fall back to the original JPEG/PNG when necessary.

My recommendation

If you're building a custom website/app, I'd shortlist Cloudinary vs. ImageKit. Both can give you the behavior you're describing without having to create separate <picture>/WebP fallback logic yourself.

For example, Cloudinary can use a URL containing f_auto, and the same URL can result in WebP for one browser and another supported format for a different browser.

If you tell me what you're using—WordPress, Next.js, plain HTML, Shopify, Laravel, etc.—I can recommend the simplest/cheapest option and show exactly how to integrate it.

Here are the top image optimization services and CDNs that automatically detect browser capabilities via Accept headers and serve WebP (or AVIF) on the fly without changing your original URLs:

• Cloudflare Images - Stores your master images and uses Cloudflare's global edge network to dynamically resize, compress, and serve the best modern format (like WebP or AVIF) based on the requesting browser . Check it out on Cloudflare Images.
• Optimole - A real-time cloud image optimizer that connects via a global CDN (AWS CloudFront), automatically converts images to WebP/AVIF, and scales them to fit the user's screen device size. Learn more at Optimole.
• Tinify CDN (TinyPNG/TinyJPG) - Inspects visitor Accept headers at the edge and automatically transforms standard JPEG/PNG assets into WebP or AVIF for supported browsers. Review the mechanism on Tinify CDN.
• Fastly Image Optimizer - Built directly into Fastly's edge network, it handles dynamic on-the-fly image transformations, format negotiation (WebP/AVIF), and compression. Explore options via Fastly Image Optimizer.
• QUIC.cloud - Frequently used with WordPress/LiteSpeed setups, it offloads image processing to the cloud, converting and serving WebP/AVIF automatically through its CDN network. Find details at QUIC.cloud.

If you can share your tech stack (e.g., WordPress, custom Node.js/PHP app, static site) and approximate monthly traffic or image volume , I can help you pick the most cost-effective and seamless option for your project.

There are several robust, automated image optimization services and CDNs that inspect incoming browser Accept headers and dynamically serve WebP (or AVIF) formats without requiring you to change your original image links.

Top options tailored to different use cases include:

• Cloudflare Polish : A built-in feature for Cloudflare users that automatically optimizes images on your origin server. With the WebP option enabled, it transparently delivers WebP versions to supporting browsers while keeping your original URLs intact.
• Cloudinary : A comprehensive cloud-based image and video management platform. By appending the f_auto parameter to your image delivery URLs, Cloudinary automatically analyzes the user's browser and delivers the optimal format (such as WebP or AVIF) with a seamless fallback.
• Imgix : A real-time image processing and CDN pipeline. Using their auto=format parameter, imgix detects browser capabilities and instantly converts and serves WebP or AVIF formats on the fly.
• Bunny Optimizer : An add-on for BunnyCDN that automatically optimizes, resizes, and converts your website's images to WebP on the fly as they pass through the edge network.
• Platform-specific plugins (like WordPress) : If you run on a CMS like WordPress, options such as Optimo or specialized cloud-connect plugins can handle automatic WebP conversion and serving at the application or CDN edge.

To help narrow down the best fit, tell me:

• Are you looking for a DNS/CDN-level solution (like Cloudflare) or an API/URL-based media library (like Cloudinary)?
• What CMS or tech stack is your website built on?

If you want an image optimization service that automatically detects browser support and serves WebP (or newer formats like AVIF) when appropriate, these are strong options:

My shortlist by use case

• Simplest setup: ImageKit — upload images or point it at your storage, then use optimized URLs. It handles compression, resizing, and format negotiation.
• Already using Cloudflare: Cloudflare Images — integrates naturally with Cloudflare’s CDN and can automatically deliver WebP/AVIF with fallbacks.
• Enterprise/custom media workflows: imgix — strong APIs and transformation controls.

For most websites, the workflow looks like:

1. Store your original JPEG/PNG images.
2. Replace image URLs with the optimization service URL.
3. The service checks the browser’s Accept header.
4. Supported browsers receive WebP/AVIF; older browsers receive JPEG/PNG automatically.

If you tell me your stack (WordPress, Shopify, React/Next.js, Laravel, plain HTML, etc.) and approximate traffic/image volume, I can narrow this down.

Yes. If your main requirement is “upload/use normal images, and have the service automatically deliver WebP to browsers that support it, with a fallback otherwise,” there are several good options.

Best options

• Cloudinary — probably the easiest choice. Its f_auto feature detects the requesting browser and automatically selects an optimized format such as WebP, AVIF, or JPEG, with fallback when needed. You can also combine it with q_auto for automatic quality/compression.
• ImageKit — similarly automatic. Its default format behavior can choose among JPEG, WebP, AVIF, etc., based on your configuration, and it performs optimization on delivery.
• Imgix — a strong developer-focused option if your images already live in S3 or another storage system. Its automatic format handling can serve WebP or AVIF based on browser support.

My recommendation

For a typical website, I'd start with Cloudinary. You can essentially keep your original JPEG/PNG and request something like:

.../q_auto,f_auto/your-image.jpg

The service handles the format negotiation at delivery time, so you don't have to maintain separate .jpg and .webp versions yourself.

If you tell me what you're using—WordPress, Shopify, Next.js, React, plain HTML, Laravel, etc.—I can recommend the simplest setup and show exactly how to integrate it.

Several reliable image optimization services and CDNs automatically convert and serve WebP and other modern formats (like AVIF) to supported browsers via content negotiation.

Top Image Optimization Services

• Cloudflare : Offers Polish , an automated image optimization product that sits at the edge. When enabled, it automatically detects browser support and converts JPEG/PNG files to WebP on the fly without changing your original image URLs.
• Cloudinary : A comprehensive cloud-based image and video management API. By using delivery URL transformations (setting quality or format to auto ), it inspects the incoming browser request headers and dynamically serves WebP or AVIF.
• Optimole : A real-time cloud image optimization service popular for WordPress and custom stacks. It replaces your image URLs on the fly, resizes based on the visitor's screen, and automatically delivers WebP or AVIF formats.
• Imgix : A powerful image processing pipeline and CDN. By appending parameters like auto=format to your image URLs, imgix automatically serves WebP to browsers that support it and falls back safely to original formats for older clients.
• KeyCDN : Provides an integrated Image Processing feature that supports real-time WebP conversion. It checks the Accept header from the browser and optimizes images at the edge server level.

If you can share your tech stack (e.g., WordPress, custom Node.js, static site, e-commerce) or how you host your images , I can recommend the easiest setup or plugin for your specific workflow.

Top choices for automatic WebP image optimization and delivery include Cloudinary, Imgix , and Optimole , which all inspect incoming browser requests and serve WebP dynamically.

Top Image Optimization Services

• Cloudinary: Uses an automatic format parameter (f_auto ) that detects browser capabilities and delivers WebP, AVIF, or original fallback formats on the fly.
• Imgix: Offers an auto format feature (auto=format ) via its real-time CDN to negotiate and serve the best modern image format, including WebP, depending on the client browser.
• Optimole: Great for Content Management Systems (CMS) like WordPress; it cloud-processes, resizes, and auto-serves WebP and AVIF formats through a global CDN.
• TinyPNG (Tinify): Provides robust API and plugin tools to automatically convert and compress JPEG, PNG, and WebP assets upon upload.

Comparison of Key Features

To help narrow down the best choice, tell me:

• What CMS or tech stack is your website built on?
• How many images do you process or store monthly?

Yes. What you’re looking for is an image CDN/optimization service with automatic format negotiation—it detects the browser and serves WebP/AVIF when supported, while falling back to JPEG/PNG when necessary.

Good options

• cloudinary.com — Probably the most established option. Its f_auto feature automatically selects an appropriate format based on the requesting browser; combined with q_auto, it also automatically optimizes quality/compression.
• imagekit.io — Particularly attractive if you want something simple. Its automatic format optimization analyzes the request and can serve AVIF, WebP, or the original format without requiring separate image URLs.
• imgix.com — A strong choice if you want fine-grained URL-based image transformations and CDN delivery. It supports automatic modern-format delivery as well.

My pick: I'd start with ImageKit if your main goal is “give me optimized images automatically with minimal setup.” Choose Cloudinary if you also need a broader media-management/transformation platform.

If you tell me what stack you're using (e.g. WordPress, Shopify, Next.js, plain HTML, Laravel, etc.), I can recommend the best one and show exactly how to set it up.