When should I use it?
Use Image Alt Checker when you need a private, upload-free browser tool for this task.
Online SEO Auditor & Generator
Image Alt Checker
Find missing and weak image ALT text in any HTML page.
100% Browser-Based — HTML and text stay on your device. Optional URL fetch runs from your browser only (CORS may block some sites).
✓ Browser Processing
✓ No Upload
✓ Privacy First
✓ Free Forever
✓ Works Offline
Tip: drag & drop .html / .txt here. Auto-save restores your draft after refresh.
If CORS blocks the request, paste HTML or upload a saved page instead.
Tool Options
Preview
Fix Suggestions
Results
Results will appear here…
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FreeConverter.app Guide
What does Image Alt Checker do?
Find missing, empty and duplicate image ALT text.
Who is it for?
Developers, marketers, students, and anyone who needs a free browser utility.
Example input
Paste text, markup, or choose a local file (processed only in this browser tab).
Example output
Instant on-device result you can copy or download — nothing leaves your device.
Browser processing100% in-browser
PrivacyLocal Processing
UploadNot required
DifficultyEasy
How It Works
SEO auditor + generator workflows that run in your browser.
1
Paste, upload or fetch
Paste HTML/text, upload a file, or enter a URL for best-effort browser fetch.
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2
Analyze & score
Validation, SEO score and fix suggestions run locally in your browser.
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3
Copy or download
Export HTML, JSON, CSV, TXT or print the report instantly.
Zero server upload — generate, validate and fix suggestions stay on your device.
About Image Alt Checker
Audit img ALT attributes for missing, empty, duplicate and filename-based text with SEO suggestions. Built as a mini SEO audit workflow: generate or analyze, validate, score, then copy ready-to-use code.
FAQs
No. SEO tools process content in your browser. FreeConverter servers never receive your page HTML or text.
Browser fetch is best-effort. Many sites block cross-origin requests (CORS). If fetch fails, paste HTML or upload a file instead.
Yes. FreeConverter.app browser SEO tools are free to use.
No. FreeConverter.app processes this tool locally in your browser. Your input is not uploaded to our servers.
No. Image Alt Checker on FreeConverter.app is free to use without creating an account.
Developers, marketers, students, and anyone who needs a free browser utility.