4xx Client Error
HTTP 425 Too Early
The server will not process a request that might be replayed.
Check a URL's HTTP statusWhat 425 means
Related to TLS 1.3 early data (0-RTT), which could be replayed by an attacker.
Common causes
- A request sent in TLS early data to a sensitive endpoint.
How to fix it
- Retry the request after the TLS handshake completes; most clients do this automatically.
How to check a status code
Enter a URL in the HTTP Status Checker to see its status code, every redirect hop, and response time. For redirect-heavy pages, the Website Speed Test shows how much time redirects add.
FAQ
- What does HTTP 425 mean?
- 425 Too Early is a 4xx client error status code. The server will not process a request that might be replayed.
- What causes a 425 error?
- A request sent in TLS early data to a sensitive endpoint.
- How do I fix HTTP 425?
- Retry the request after the TLS handshake completes; most clients do this automatically.
Defined in RFC 8470.
Other 4xx client error codes
400 Bad Request401 Unauthorized403 Forbidden404 Not Found405 Method Not Allowed406 Not Acceptable408 Request Timeout409 Conflict410 Gone413 Content Too Large414 URI Too Long415 Unsupported Media Type418 I'm a teapot422 Unprocessable Content429 Too Many Requests431 Request Header Fields Too Large451 Unavailable For Legal Reasons