Alpha-2
- en -> valid
data validator
Language Code Validator
Validate ISO language codes (alpha-2 and alpha-3) client-side.
Results
Processing…- Status
- Processing...
- Details
- Processing...
- Format
- Processing...
- Code
- Processing...
Rules & checks
Supports common ISO 639 alpha-2 and alpha-3 codes.
Case-insensitive input; outputs uppercase.
Runs entirely client-side/offline; no data leaves the page.
When to use it
- Validate locale settings and language selectors
- QA CSV imports with language columns
- Check API payloads or config files for valid language codes
Tips
- Normalize codes to lowercase or uppercase for consistency
- Pair with country code validation for locale strings (e.g., en-US)
Examples
Alpha-3
- eng -> valid
Invalid
- zzz -> invalid
FAQs
- Is anything uploaded?
- No. Validation runs locally and clears on refresh.
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