HTTP Reference
HTTP 301 Moved Permanently
Resource has a new permanent URL.
HTTP 301 is in the redirection class. Use this page to diagnose likely causes, validate request or upstream behavior, and decide what to fix first. The sections below are intentionally practical so you can move from status-code recognition to concrete debugging actions without leaving this reference flow.
Common Causes
- Resource path was permanently moved.
- Canonical host/path enforcement triggered a redirect.
- Legacy URL migration is in effect.
Debugging Notes
- Validate redirect target and avoid redirect chains.
- Check SEO canonicals and sitemap URLs match destination.
- Confirm method/body behavior if clients replay requests.
What To Do Next
- Update internal links to new destination URL.
- Monitor crawl and cache behavior after migration.
- Remove unnecessary intermediate redirect hops.
Use this response as baseline behavior and monitor for regressions in latency, caching, and contract shape.
Example Response
{
"status": 301,
"location": "https://plainutils.dev/new-path"
}Related Tools
Operational Context
One status code can appear for multiple reasons depending on routing layer, service topology, and policy configuration. Always pair code-level interpretation with request identifiers, deployment timestamps, and upstream dependency metrics before deciding on remediation. That context helps avoid false fixes and reduces repeated incidents.
For long-term reliability, add automated coverage for this status behavior in both happy-path and failure-path tests. Teams that document expected status responses per endpoint usually resolve production issues faster because triage starts from known contracts instead of assumptions.