Inventory page images, measure alt coverage, and flag missing, filename, or overlong alt text.
- Free
- No signup
- Fast
- Privacy-friendly
What next?
Keep going with Image Alt Text Checker
Finish this check in the browser, then pick the path that matches how you work — another related tool, REST for apps, or MCP for agents.
- 1. Related check
After this result, run Meta tags analyzer for the next signal.
Meta tags analyzer - 2. Automate with API
Same job from your server with
Create free accountX-Api-Key. Free tier includes 500 credits/month. - 3. Hand off to an agent
Connect Cursor or Claude to ToolYour MCP — plan → run → verify.
MCP setup
What is Image Alt Text Checker?
Missing or filename alts (IMG_3401.jpg) fail accessibility and waste image context for search. CMS imports often copy the file name into alt. Decorative images incorrectly get long keyword alts; informative images ship with no alt at all.
This Image Alt Text Checker inventories img tags (including data-src), scores meaningful alt coverage, and flags missing attributes, empty decorative candidates, filename-like alts, and overlong text — with a prioritized evidence table.
Use it on product galleries, blog templates, and after bulk media migrations.
What are common questions about Image Alt Text Checker?
What problem does the alt checker solve?
It lists images with missing, empty, filename, or overlong alt text so you fix accessibility and image SEO context.
What is a filename-like alt?
Alt that matches a media filename or ends in common image extensions — usually a CMS import default.
How does this differ from SEO audit?
SEO audit summarizes alt coverage. This page is a full image inventory with per-URL evidence.
What coverage percent means?
Share of images with non-empty, non-filename alt text over total inventoried images.
Is empty alt always wrong?
No. alt="" is correct for purely decorative images. Informative images need descriptive alt.
Who runs alt audits?
Content ops, a11y reviewers, and SEO teams after media migrations and theme changes.
How long should alt be?
Keep informative alts concise — roughly under 125 characters; put long captions in nearby text.
Are CSS background images checked?
No. This pass covers HTML img/src and data-src only.
What are the key features of Image Alt Text Checker?
Full image inventory
Lists src, alt, lengths, and decorative suspects up to a capped table.
Missing alt detection
Flags img tags with no alt attribute.
Filename alt catch
Detects alts that look like IMG_1234.jpg import defaults.
Prioritized fixes
Ranks missing alts above decorative empty-alt reviews.
Long alt warnings
Highlights alts over ~125 characters.
Coverage scoring
Reports meaningful-alt percentage with documented formula.
How do you use Image Alt Text Checker?
Enter the page URL
Paste a gallery, product, or article URL rich in images.
Run the alt checker
Inventory images and score coverage.
Fix missing and filename alts first
Update CMS media fields; leave true decorative images as alt="".
Use cases: ecommerce, blogs, migrations
Product grids — Confirm each SKU image describes the product, not sku-red-01.webp.
Editorial imports — Writers paste from Docs with empty alts; catch them before publish.
DAM migrations — After bulk upload, filename defaults flood alt fields.
Continue performance image work on Page Speed Analyzer.
Why alt text still matters for SEO and a11y
Alt text is required for non-text content under WCAG-style accessibility practice and supplies textual context when images fail to load. Search systems use available text cues around images; filename alts add noise, not meaning.
Limitations
Does not crawl external CSS files for background images or execute JS galleries. Srcset candidates beyond primary src/data-src are not fully expanded in v1.
Free · API · MCPToolYour platform
Use Image Alt Text Checker three ways
The free Image Alt Text Checker on this page works in your browser. The same workflow is available via REST API for apps and via the remote MCP server for Cursor, Claude, and other agents — one API key, one plan, one quota. This tool is part of the seo-apis module under Digital Tools.
- 1Create a free accountGet an API key for REST and MCP — 500 credits/month on the free tier.
- 2Connect or callPaste the MCP URL into Cursor/Claude, or call REST with
X-Api-Key. - 3Same key & creditsBrowser smoke-checks stay free; API-backed runs share one monthly credit quota.
- Free in browserUse Image Alt Text Checker here — no account required.
- REST APICall from your server with
X-Api-Key. - Remote MCP serverSame job from Cursor or Claude via the ToolYour remote MCP server — one API key with REST.
Which on-page SEO tools sit in this cluster?
- Meta tags analyzer
Title, description, and social meta length checks.
- Heading structure analyzer
H1–H6 outline and hierarchy issues.
- SERP snippet preview
Preview how title and description may appear in SERPs.
- Keyword checker
On-page keyword density and placement signals.
- Content optimization
Score copy against on-page SEO basics.
Where does this job fit on ToolYour?
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Which toolkits include Image Alt Text Checker?
- SEO Toolkit
SEO Toolkit groups keyword checker, page speed analyzer, internal link checker, link extractor, and site audit tools for on-page SEO workflows — browser smoke-checks plus agent playbooks.
- Content Creator Toolkit
Summarize media, compress images, and prepare social/SEO snippets for creators.