Alt Text Helper
Write accessible, SEO-friendly image alt text — with live length checks and warnings for common mistakes.
Describe images the right way
Alt text serves two audiences at once: people using screen readers, who hear it in place of the image, and search engines, which use it to understand and rank your visuals. Good alt text is a concise, accurate description of what the image communicates — not a dumping ground for keywords, and not padded with redundant phrases like “image of”, which screen readers already announce.
This helper counts your length against the ~125-character guideline, flags the most common mistakes — “image of/picture of” prefixes, empty text, or keyword stuffing — and hands you ready-to-paste HTML. Describe what matters in context, keep it tight, and mark purely decorative images with empty alt text.
Private and instant
Everything runs in your browser — nothing is uploaded.
Frequently Asked Questions
What makes good alt text?
Alt text should concisely describe what the image conveys in context — ideally under about 125 characters, without “image of” or “picture of”, and without keyword stuffing.
How long should alt text be?
Around 125 characters is a common guideline, since some screen readers cut off longer descriptions. Be descriptive but efficient; move lengthy detail into surrounding text.
Should decorative images have alt text?
No. Purely decorative images should use an empty alt attribute (alt="") so screen readers skip them. Reserve descriptions for images that carry meaning.
Is this tool free and private?
Yes. The analysis runs in your browser — nothing is uploaded or stored.
Count and refine any text as you write, on any site.