Check HSTS configuration and preload list eligibility.
HSTS Preload Checker: Check HSTS configuration and preload list eligibility. Catches the subtle errors — trailing commas, type mismatches, missing brackets — that cause runtime failures. Designed for sensitive data — no server round-trips, no storage, no third-party calls. A browser-based Security tool on HttpStatus.com.
HSTS Preload Checker validates syntax and format rules. For schema-level checks, use a dedicated schema validator.
No. HSTS Preload Checker reports errors with exact positions but doesn't modify your input. Use it to find problems, then fix them yourself.
Yes — each tool has a stable URL. Bookmark it for quick access anytime.