Who this helps
- Editors reviewing image descriptions
- Developers checking article HTML
Blog Utility
Image Alt Checker
Analyze image tags in blog post HTML and quickly check missing alt attributes, empty alt values, and filename-like descriptions.
Missing Alt Check
Check whether image tags are missing alt attributes.
Image SEO Check
Review image descriptions for search engines and accessibility.
Blog Quality Control
Quickly organize missing image descriptions before publishing.
Enter Body HTML
Paste your blog post body HTML to automatically analyze image tags and alt attribute status.
0 chars
Enter HTML code and click the alt check button.
Check Result
Check the total number of images, alt status, and images that need review.
0
Total Images
0
Valid Alt
0
Missing Alt
0
Empty Alt
| No. | Image Path | Alt Text | Status |
|---|---|---|---|
| The check result will appear here. | |||
Distinguishing missing alt text from intentional empty alt
List img elements and flag missing alt attributes, empty text, filename-like descriptions and very short labels. Decide the appropriate alternative from the image's purpose in its surrounding content.
When to use this tool
- Find uploaded images still labeled with filenames.
- Review decorative images without adding unnecessary spoken text.
From input to a checked result
- 1
Copy the HTML containing the images.
- 2
Paste no more than 500,000 characters.
- 3
Run the checker and review each img row.
- 4
Decide whether each image conveys information or is decorative.
- 5
Write contextual text for informative images and recheck the published page.
An unhelpful filename
- Input
- <img src="/chart.png" alt="chart.png">
- Result
- A filename-like alt warning
Replace the filename with the chart's relevant meaning, including the key result when needed.
A decorative separator
- Input
- <img src="/divider.png" alt="">
- Result
- An empty-alt review warning
An intentional empty alt can be correct for a purely decorative image.
How it works
DOMParser examines img elements. It flags an absent alt, empty alt, common image filenames or generic labels, and text shorter than four code units. It does not view the image.
Limitations
- An empty alt is appropriate for many decorative images.
- A short but meaningful label can be sufficient.
- CSS backgrounds, SVG title/desc and images created later by scripts are not evaluated.
Your data
The checker analyzes pasted markup locally and does not upload the HTML to win-j.
References
Related tools
- H1 / H2 Structure Checker
Extract the first three heading levels from HTML and review empty headings, repeated H1 elements and missing section structure. The outline is a starting point for editorial and accessibility review.
- Meta Tag Generator
Build basic title, description, robots and optional canonical tags alongside Open Graph and Twitter Card groups. Review the generated code against your existing template to avoid duplicate metadata.
Frequently asked questions
Should every image have a long description?
No. Describe its purpose concisely; purely decorative images usually need empty alt.
Can the tool write alt from the image?
No. It does not recognize image content.
Does an empty-alt warning mean an accessibility failure?
Not by itself. The image's role and surrounding content determine whether empty alt is appropriate.