On Friday, December 19, 2025 at 11:50:19 AM UTC-8 Chromestatus wrote: *Contact emails* [email protected], [email protected], [email protected], [email protected]
*Explainer* https://github.com/webmachinelearning/webnn/blob/main/explainer.md *Specification* https://webmachinelearning.github.io/webnn *Design docs* https://docs.google.com/document/d/1kIc5NO1PU1DbGHKOsnan- tEhV01L6_K3OLA5g0o4Ts4/edit?resourcekey=0-ltUDiDZqxKgARhtNqsGJeg *Summary* WebNN seeks to enable web applications and frameworks to take advantage of native operating system services for machine learning and the underlying hardware capabilities available on a user's computer to implement consistent, efficient, and reliable ML experiences on the web. *Blink component* Blink>WebML <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EWebML%22> *Web Feature ID* webnn <https://webstatus.dev/features/webnn> *TAG review* https://github.com/w3ctag/design-reviews/issues/933 *TAG review status* Issues addressed *Origin Trial documentation link* https://webnn.io/en/learn/get-started/quickstart *Risks* *Interoperability and Compatibility* Aside from the risk that other browsers do not implement (which is trending towards unlikely given that Edge is planning to ship alongside Chrome and Firefox is planning to implement) the primary interoperability risk is that a WebNN implementation needs to abstract over the ML acceleration capabilities of the underlying platform and hardware. The specification mitigates this risk by defining a set of ML operations which must be supported and provides a feature detection mechanism for discovering additional operations that may be optionally supported. This allows developers to write broadly interoperable code by using only the required operations or design their applications to adapt to additional capabilities at runtime. *Gecko*: Positive (https://github.com/mozilla/standards-positions/ issues/1215#issuecomment-3520278819) *WebKit*: No signal (https://github.com/WebKit/standards-positions/ issues/486) Apple is participating in the WebML WG but has made no public statements about implementation. *Web developers*: Positive Microsoft's ONNX runtime includes an execution provider for WebNN (https://onnxruntime.ai/docs/tutorials/web/ep-webnn.html). Google's LiteRT.js framework has announced that they are working on WebNN support (https://youtu.be/HAjotVloAvI?t=219). *Other signals*: The WebNN implementation in Chromium is a collaboration between Google, Intel, and Microsoft. Edge will be launching WebNN at the same time as Chrome. *Ergonomics* For some use cases, particularly real-time ML processing of video, integration between WebNN and WebGPU is required. Support for this has been prototyped on some platforms as an `exportToGPU()` method that takes an `MLTensor` and makes it available as a `GPUBuffer` but this is not yet available on all platforms. *Activation* Most developers don't write JavaScript or WebGPU shader code to execute their ML models by hand. Instead frameworks such as LiteRT.js, ONNX Runtime Web, WebLLM or Transformers.js are used. Support for WebNN in these frameworks (already starting to appear) will be a large factor in the adoption of this API. *Security* The primary security risk is exposing the underlying platform frameworks to potentially malicious content. This is mitigated through sandboxing of the GPU process and fuzz testing. The risks are similar to WebGPU, though the expressiveness of WebNN is lower than WGSL. *WebView application risks* Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? This is a new API. *Goals for experimentation* *No information provided* Due to GoogleChrome/chromium-dashboard#4155 <https://github.com/GoogleChrome/chromium-dashboard/issues/4155> this wasn't filled in. It should read: The goal of this experiment is to understand how well real-world models abstract to the operations supported by WebNN and how well WebNN can map these operations to those supported by the hardware of real-world users. *Ongoing technical constraints* WebNN can currently execute models on CPU across all platforms but support for GPU and NPU execution is more limited. This will expand as development continues. *Debuggability* There is currently no special DevTools support for this API beyond regular JavaScript debugging. A feature we have considered (and prototyped via an internal extension and the --webnn-coreml-dump-model, --webnn-ort-dump-model, and --webnn-tflite-dump-model browser flags) is inspecting graphs constructed by a site and exporting them in the underlying platform format so that they can be inspected with other tools. *Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?* Yes *Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* Yes https://wpt.fyi/results/webnn?label=master&label= experimental&aligned&q=webnn *DevTrial instructions* https://webnn.io/en/learn/get-started/installation *Flag name on about://flags* web-machine-learning-neural-network *Finch feature name* WebMachineLearningNeuralNetwork *Requires code in //chrome?* True *Tracking bug* https://issues.chromium.org/issues/40206287 *Estimated milestones* Origin trial desktop first145 Origin trial desktop last147 DevTrial on desktop125 Origin trial Android first145 Origin trial Android last147 DevTrial on Android125 Origin trial WebView first145 Origin trial WebView last147 *Link to entry on the Chrome Platform Status* https://chromestatus.com/feature/5176273954144256?gate=5186064701194240 *Links to previous Intent discussions* Intent to Prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/ PD6TDMDS9mg This intent message was generated by Chrome Platform Status <https://chromestatus.com>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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