---
title: "Deprecation: #99031 - Deprecated f:format.html in Backend context"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-99031-1667998430"
source: "Changelog/12.1/Deprecation-99031-DeprecatedFformathtmlInBackendContext.rst"
typo3-version: "12.1"
typo3-major: 12
type: "deprecation"
issue: 99031
forge: "https://forge.typo3.org/issues/99031"
tags: ["Backend", "Fluid", "NotScanned", "ext:fluid"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Deprecation: #99031 - Deprecated f:format.html in Backend context {#deprecation-99031-1667998430}

See [forge#99031](https://forge.typo3.org/issues/99031)

## Description {#description}

The `<f:format.html />` ViewHelper `\TYPO3\CMS\Fluid\ViewHelpers\Format\HtmlViewHelper`
should not be used in TYPO3 backend context anymore.

Using this ViewHelper in backend context triggers frontend `parseFunc` logic, which
should be avoided in the backend.

There are other ViewHelpers to output and parse HTML in backend context. See description of
the [f:sanitize.html](https://docs.typo3.org/permalink/changelog:feature-94825-1667998632) ViewHelper for more details.

## Impact {#impact}

Using `<f:format.html />` logs a deprecation level warning.

## Affected installations {#affected-installations}

Instances with extensions that come with backend modules using Fluid rendering and
accessing `<f:format.html />` are affected.

## Migration {#migration}

Switch to one of the other ViewHelpers instead, typically `<f:sanitize.html />`
to secure a given HTML string, `<f:transform.html />` to parse links in HTML,
or `<f:format.raw />` to output the HTML as is when the input can be considered
"secure".