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Developer Utilities
CORS Preflight OPTIONS Request Inspector
Inspect Cross-Origin Resource Sharing preflight headers, origins, and credentials.
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How to Use CORS Preflight OPTIONS Request Inspector
- Enter or paste your input in the editor panel.
- Review the live output and copy with one click.
Frequently Asked Questions
What is CORS Preflight OPTIONS Request Inspector?
- Inspect Cross-Origin Resource Sharing preflight headers, origins, and credentials.
Is my data private?
- Yes, all processing occurs locally in your browser.
Sources & References
Primary References: CORS Preflight OPTIONS Request Inspector Reference; Developer Documentation.
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