Why does alt text matter in email?

Most major email clients (Outlook, Gmail in some configurations, corporate firewalls) block images by default. Without alt text, the email becomes unreadable for that segment. Screen readers also rely on alt text for accessibility. Good alts are an inbox-deliverability and accessibility multiplier.

What is a 'lazy alt'?

Alt text that exists but adds no information - 'image', 'img', the filename like 'banner.jpg', or 'IMG_1234'. The auditor flags these because they pass HTML validation but fail readers.

Does it generate the alt text?

The free tool flags gaps and inserts placeholders. AI-suggested alts are available in-app on the free Newsletrix tier (capped at 5 images per IP per day on the public widget).

Yes - 100% client-side parsing.

♿ Accessibility

Alt-text auditor

Paste your newsletter HTML. We list every image, classify the alt as missing / lazy / ok, and let you download a fixed copy with placeholder alts.

0-100 accessibility score Fixed-HTML download Browser-only

FAQ

Frequently asked questions

Why alt text in email?

Outlook and many corporate firewalls block images by default. Alt text keeps the email readable.

What's a lazy alt?

"image", "img", the filename, or "IMG_1234". Passes HTML validation, fails readers.

Does it write the alts?

Inserts placeholders. AI-generated alts are in-app on the free Newsletrix tier.

Free?

Yes - 100% in your browser.

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