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Email Accessibility Check (HTML email templates)

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Batch-checks HTML email templates for machine-checkable accessibility problems: missing alt text, low colour contrast, missing lang and title, layout tables without role=presentation, heading jumps, vague link text, tiny or all-caps text. One row and one report per template.

Pricing

Pay per usage

Rating

0.0

(0)

Developer

Madrasco

Actor stats

Bookmarked

Total users

Monthly active users

3 hours ago

Last modified

What it checks

Rule ID	Severity	What it flags	Based on
`img-alt-missing`	error	`<img>` with no `alt` attribute	WCAG 2.2 SC 1.1.1
`img-spacer-alt`	warning	Spacer or tracking image (1-2 px wide/high, or named like `spacer.gif`) whose `alt` is not empty	WCAG 2.2 SC 1.1.1
`img-alt-filename`	warning	Alt text that is a file name (`IMG_0042.jpg`)	WCAG 2.2 SC 1.1.1
`link-no-name`	error	Link with no text and only images with empty or missing alt	WCAG 2.2 SC 2.4.4
`link-text-vague`	warning	Link text such as "click here", "here", "read more", "learn more"	WCAG 2.2 SC 2.4.4
`link-text-url`	warning	Link text that is a bare URL	WCAG 2.2 SC 2.4.4
`contrast-low`	error	Text whose colour and background colour are both declared, with a contrast ratio below 4.5:1 (3:1 for large text: 24px, or 18.66px bold), computed with the WCAG 2.x relative-luminance formula	WCAG 2.2 SC 1.4.3
`html-lang-missing`	error	`<html>` without `lang` (or `xml:lang`)	WCAG 2.2 SC 3.1.1
`title-missing`	warning	No `<title>`, or an empty one	WCAG 2.2 SC 2.4.2
`table-role-missing`	warning	Table without `role="presentation"` (or `none`) that has no `<th>`, `<caption>` or `summary`, so it is treated as a layout table	WCAG 2.2 SC 1.3.1
`heading-order`	warning	Heading level that skips a level (`<h1>` then `<h3>`)	WCAG 2.2 SC 1.3.1 (practice check)
`font-size-small`	warning	Text with a declared font size below 14px (configurable)	practice check, not a WCAG rule
`all-caps-text`	warning	20+ letters over 3+ words in capitals, typed or via `text-transform: uppercase`	practice check, not a WCAG rule
`preheader-missing`	info	No hidden preheader text before the first visible text	practice check

Styles are read from inline style attributes, <style> blocks (type, class, ID and descendant selectors, with specificity and !important), and legacy attributes (bgcolor, background, <font color size>, <body text>). Hidden text (display:none, zero font size, visibility:hidden, max-height:0 with overflow:hidden, mso-hide:all, aria-hidden) is skipped. Font size and visibility are inherited the way a browser inherits them, so text that sets its own size inside a font-size:0 wrapper (as MJML and hybrid layouts produce) is checked.

How we tested it: on 133 public open-source email templates from 8 GitHub repositories (28 of them MJML output), run 2026-09-26, the actor flagged low contrast in the same 99 templates as the open-source axe-core checker and found none in the same 34.

What it does not check

Each report has a Not checked section that counts what the actor could not assess in that template, for example:

text over background images or gradients (contrast can't be measured from HTML);
text whose colour or background is not declared (the email client's default applies; we don't guess);
colours written as hsl(), var() or other forms it can't resolve;
@media blocks (dark-mode and mobile styles) and complex selectors (pseudo-classes, attribute selectors);
external stylesheets (not fetched);
text inside images and whether alt text is accurate (needs a person);
whether a plain-text version is sent (that is set in your email platform, not in the HTML).

This actor does not certify WCAG conformance or legal compliance (for example under accessibility laws). It runs a fixed list of automated checks; many accessibility requirements need a person to judge, and email clients change how HTML is rendered.

Input

Template URLs: links to raw HTML templates that work without a login. Private and local network addresses are refused; each download has a 30-second network timeout and a 5 MB limit by default.
HTML templates (pasted): a JSON list of {"name": "...", "html": "..."} objects, or plain HTML strings.
Key-value store with uploaded templates: pick a store from your account; every record whose key ends in .html/.htm or whose content type is HTML is checked (or only the keys you list).
Include notes (default on), Minimum font size (default 14px), Maximum template size (default 5 MB).

Up to 500 templates per run.

Output

Dataset: one row per template (view "Templates"; view "Findings" shows one line per finding):

{"name": "newsletter.html", "source": "https://example.com/newsletter.html", "status": "checked",
 "errors": 2, "warnings": 1, "infos": 0,
 "issuesByRule": {"contrast-low": 1, "img-alt-missing": 1, "link-text-vague": 1},
 "findings": [{"rule": "contrast-low", "severity": "error", "line": 19,
               "selector": "html > body > table > tr > td > p:nth-of-type(1)", "snippet": "<p class=\"muted\">",
               "message": "Contrast 2.32:1 (#aaaaaa on #ffffff); needs 4.5:1 for normal text (16px).",
               "text": "Low contrast grey text on white.", "contrastRatio": 2.32, "required": 4.5,
               "foreground": "#aaaaaa", "background": "#ffffff"}],
 "notChecked": [{"what": "text over background images (contrast not measurable)", "count": 1}],
 "reportKey": "001-newsletter.html", "reportUrl": "https://api.apify.com/v2/key-value-stores/.../records/001-newsletter.html"}

(Shortened example.) A template that can't be loaded gets a row with status load-failed and the reason.

Key-value store: NNN-<name>.html and NNN-<name>.md per template, and OUTPUT with run totals.

If your account's storage access is set to Restricted, the reportUrl link opens only while you are signed in to Apify; you can also open the reports from the run's Storage tab.

Privacy

Templates are loaded into the run, checked in memory and written only to your own Apify storage. Nothing is sent anywhere else. Pasted HTML is kept in the run input like any Apify input.

Support

Open an issue on the actor's Issues tab. This actor is built and maintained with AI assistance by Madrasco; a human owner can be reached on request through the Issues tab.

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