Intent to Ship: Sanitizer API

[Chromestatus]

Contact emails

voge...@google.com

Explainer

https://github.com/WICG/sanitizer-api/blob/main/explainer.md

Specification

https://wicg.github.io/sanitizer-api

Summary

The Sanitizer API offers an easy to use and safe by default HTML Sanitizer API, which developers can use to remove content that may execute script from arbitrary, user-supplied HTML content. The goal is to make it easier to build XSS-free web applications. This follows previous attempts at establishing a Sanitizer API (https://chromestatus.com/feature/5786893650231296), which we unshipped again (https://chromestatus.com/feature/5115076981293056). The specification has meanwhile progressed and now has widespread support.

Blink component

Blink>SecurityFeature>SanitizerAPI

Web Feature ID

SanitizerAPI

Motivation

User input sanitization is a necessary and common activity of many web applications, but it's difficult to get right. As a component of the web platform it's easier to harden the sanitizer implementation and keep it up-to-date. Offering a high-quality sanitizer with good defaults (without blocking developers from using their own, if they choose) would improve security, and make it more accessible.

Initial public proposal

https://wicg.github.io/sanitizer-api/

TAG review

https://github.com/w3ctag/design-reviews/issues/619

TAG review status

Issues addressed

Risks

Interoperability and Compatibility

No information provided

Gecko: Positive (https://github.com/mozilla/standards-positions/issues/106) Sanitizer API is enabled in Firefox nightly: https://www.firefox.com/en-US/firefox/148.0a1/releasenotes/

WebKit: Support (https://github.com/WebKit/standards-positions/issues/86)

Web developers: No signals

Other signals: HTML: stage 2. (https://github.com/whatwg/html/issues/7197) TAG, early design review: https://github.com/w3ctag/design-reviews/issues/619

Security

https://wicg.github.io/sanitizer-api/#security-considerations

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?

No information provided

Debuggability

These APIs are readily accessible and testable using DevTools.

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?

Yes
https://wpt.fyi/results/sanitizer-api?label=experimental&label=master&aligned

Flag name on about://flags

No information provided

Finch feature name

SanitizerAPI

Rollout plan

Will ship enabled for all users

Requires code in //chrome?

False

Tracking bug

https://issues.chromium.org/issues/40138584

Estimated milestones

Shipping on desktop	145
Shipping on Android	145
Shipping on WebView	145

Anticipated spec changes

Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (e.g. links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (e.g., changing to naming or structure of the API in a non-backward-compatible way).

We expect to "upstream" the current WICG specification to become part of HTML proper. See: https://github.com/whatwg/html/issues/7197

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5814067399491584?gate=5398359461068800

Links to previous Intent discussions

Intent to Prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CALG6KPP0LBdNCieNydc6dfObByS2kCg1B2yvd6eZJHGTkW%2Bd-w%40mail.gmail.com

This intent message was generated by Chrome Platform Status.

[Chris Harrelson]

LGTM1

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[Yoav Weiss (@Shopify)]

On Mon, Dec 15, 2025 at 6:25 PM Chris Harrelson <chri...@chromium.org> wrote:

LGTM1

On Mon, Dec 15, 2025 at 6:40 AM Chromestatus <ad...@cr-status.appspotmail.com> wrote:

Contact emails

voge...@google.com

Explainer

https://github.com/WICG/sanitizer-api/blob/main/explainer.md

I think it can be useful to add a section to the explainer to outline the differences and relationship to Trusted Types.

 

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOMQ%2Bw9SsSs_2OOr5c8Q7--Yef%2BM1V0e0%2BUDOC_zaRgsrJnzBQ%40mail.gmail.com.

[Yoav Weiss (@Shopify)]

LGTM2

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[Alex Russell]

LGTM3