HTML5 is the fifth major version of the HyperText Markup Language used for structuring and presenting content on the web. Standardized by the W3C in 2014 and now maintained by WHATWG as the HTML Living Standard, HTML5 introduced semantic elements (article, section, nav, header, footer, aside), native multimedia via the audio and video elements, the canvas drawing surface, web storage (localStorage and sessionStorage), geolocation, drag-and-drop, offline application support, Web Workers for background processing, and richer form input types with built-in validation. HTML5 remains the foundation for modern web applications and the substrate that HTTP-based APIs ultimately render and consume on the client.
HTML5 is profiled on the APIs.io network. Tagged areas include Frontend, HTML5, Living Standard, Markup Language, and Multimedia.
Regulatory Posture applies to this provider. Its tags matched the
Horizontal (data, software, accessibility, platform) regime, so
Regulatory Posture carries 15 points of the composite.
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Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
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never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
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Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
aid: html5
name: HTML5
description: HTML5 is the fifth major version of the HyperText Markup Language used for structuring and presenting content
on the web. Standardized by the W3C in 2014 and now maintained by WHATWG as the HTML Living Standard, HTML5 introduced semantic
elements (article, section, nav, header, footer, aside), native multimedia via the audio and video elements, the canvas
drawing surface, web storage (localStorage and sessionStorage), geolocation, drag-and-drop, offline application support,
Web Workers for background processing, and richer form input types with built-in validation. HTML5 remains the foundation
for modern web applications and the substrate that HTTP-based APIs ultimately render and consume on the client.
url: https://raw.githubusercontent.com/api-evangelist/html5/refs/heads/main/apis.yml
type: Index
deliveryModel:
model: unknown
open_source: false
commercial: false
callable_host: false
label: Delivery model not determined — needs a product licence on record
confidence: low
source:
- none
generated: '2026-08-28'
method: derived
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source: []
generated: '2026-07-22'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/html5.png
tags:
- Frontend
- HTML5
- Living Standard
- Markup Language
- Multimedia
- Semantic Web
- W3C
- Web Development
- WHATWG
created: '2025'
modified: '2026-04-28'
specificationVersion: '0.23'
apis: []
common:
- type: DomainSecurity
url: security/html5-domain-security.yml
- type: Website
url: https://html.spec.whatwg.org/
- type: Reference
url: https://developer.mozilla.org/en-US/docs/Web/HTML
- type: Specification
url: https://www.w3.org/TR/html52/
- type: Wikipedia
url: https://en.wikipedia.org/wiki/HTML5
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
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