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.
Length and privacy
Screen readers often cut descriptions around 125 characters, which is why the live counter warns before your alt text runs long. Everything stays in the browser and is never 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.