Developer Tools

HTTP Status Code Reference & Debugger

Instant lookup and debugging guide for all HTTP status codes (1xx-5xx) with RFC specifications and troubleshooting advice.

Recommended developer stack

Reliable SSD droplets, managed databases, and Kubernetes clusters deployed in seconds.

The open source Firebase alternative. Dedicated Postgres DB, instant Auth, and REST/GraphQL APIs.

Protect your developer workstations, APIs, and DNS queries with fast, encrypted tunnels.

Affiliate Disclosure: We may earn a commission from partner signups at zero cost to you, which funds our free tools and ad-free hosting.

HTTP status codes are standard response codes issued by web servers to indicate whether a specific HTTP request was successfully completed.

401 Unauthorized means authentication is required or failed, while 403 Forbidden means the server understands who you are but refuses access.

Yes, all status code lookups and specifications run entirely within your browser.