Free Alt Text Generator
Turn a messy image filename into clean, accessible alt text, and get told when your alt text is too long, redundant, keyword-stuffed, or should be empty entirely.
- Filename cleanup
- Mistake detection
- Decorative-image handling
Image details
Alt Text Generator
Alt text
Generated result
alt="Blue running shoes side view" <img src="IMG_2481_blue-running-shoes-side-view.jpg" alt="Blue running shoes side view" /> CHECKS • Length 28/125 — fits. Alt text is an accessibility requirement first. If it does not describe the image accurately to someone who cannot see it, it is wrong regardless of the keywords in it.
Where this tool fits
How to use the alt text generator
Alt text is an accessibility feature first
Alt text exists so someone using a screen reader gets the same information a sighted visitor gets from looking at the image. That is its job, and it is also a legal requirement under WCAG and the accessibility laws that reference it. The SEO benefit (helping Google understand the image, earning image-search traffic, giving a broken image something readable) comes free when you write it properly for a person. Writing it for a crawler instead produces text that fails both.
Describe the function, not just the contents
The right alt text depends on why the image is on the page. A photo of a shoe in a review needs its visible detail, "Blue running shoe, side view, showing the sole tread". The same photo as a link to a product page needs to describe the destination. A chart needs the finding it shows, not "bar chart", because the whole point of the chart is the number it reveals. Ask what a sighted reader takes from the image, then write that.
Decorative images take an empty alt, not a missing one
A background texture, a divider, or an icon sitting next to text that already says the same thing carries no information. The correct markup is alt="", an explicitly empty attribute, which tells a screen reader to skip it silently. Omitting the attribute entirely is a different thing and worse: many screen readers then read out the filename, so the visitor hears "I M G underscore 2 4 8 1 dot j p g". Empty and absent are not the same.
The four mistakes worth checking for
Starting with "image of" or "picture of", a screen reader already announces that it is an image, so you are making the listener sit through it twice. Running past roughly 125 characters, where some screen readers cut off. Stuffing keywords, which reads as gibberish aloud and is explicitly against Google's image guidelines. And leaving the raw camera filename in place, which is what happens by default in most CMSes and is the most common failure of all.
Alt Text Generator FAQ
Is the alt text generator free?
Yes. The alt text generator is free to use on Seobase with no signup required for the on-page alt text.
Can I use the alt text generator for SEO content?
Yes. The tool is built for search-focused workflows and pairs best with human review before publishing.
How long should alt text be?
Aim for under 125 characters. Some screen readers truncate around there, and if an image genuinely needs more explanation than that, the explanation belongs in the page text or a caption where everyone can read it.
Should I put my keyword in the alt text?
Only when it honestly describes the image. A keyword that fits the description is a bonus; one forced in is keyword stuffing, reads as nonsense to a screen reader, and is against Google's image guidelines.
What about purely decorative images?
Use alt="", an empty attribute, deliberately. That makes screen readers skip the image. Leaving the attribute off entirely often makes them read the filename aloud instead.
Does alt text affect rankings?
It is how Google understands what an image shows, so it drives Google Images traffic and adds a little topical context to the page. The bigger reason to get it right is that it is an accessibility requirement, not a ranking tactic.
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