Dev-Tools for messy engineering work.

Paste a timestamp. The strict RFC3339 check requires a date, time, seconds, and either Z or a numeric offset. JavaScript keeps only millisecond precision; the normalized UTC display preserves your original fractional precision.

Enter the page origin, API URL, request method and relevant request/response headers. This simulates the browser’s CORS checks; it does not send a network request. A failed HTTP status is different from CORS: the server replied, but CORS may prevent JavaScript from reading it.

Paste a status line, headers, and optional body. The inspector recognizes Problem Details JSON, authentication failures, rate limiting, server failures, and retry hints. Its retry recommendation is a safe default, not knowledge of whether your operation is idempotent.

Choose the number of retries after the first failed request. Full jitter picks any delay from zero to the calculated cap and helps prevent synchronized retry storms. The total shown is the maximum configured wait, excluding request duration.

Paste the exact message body and choose the applicable broker limit. UTF-8 size is exact; AMQP envelope size is an estimate you can tune. Base64 is calculated exactly. Gzip is measured locally when the browser supports CompressionStream. Always leave room for application properties.

Paste a JSON value, then choose an operation. Size and validity update immediately. Generated C# and TypeScript are intentionally lightweight starting points: review nullability, names, unions, and numeric types before production use.

Paste a three-part JSON Web Token. Header and payload are Base64URL-decoded locally. Expiration, issue time, issuer, audience, scopes, and roles are summarized. This tool does not fetch keys or verify the signature.

Paste a SQL Server, PostgreSQL URI, Azure Storage, Service Bus, or Redis connection string. Recognized secret fields are always redacted in the structured output. Treat the original input as sensitive even though it never leaves this browser.

Enter a standard five-field Linux expression using numbers, *, lists, ranges, and steps. The preview supports Linux cron. Azure Functions adds a leading seconds field; Quartz uses seconds and a distinct day-of-week/day-of-month model, so those dialects are explained but not silently reinterpreted.