Question 1

Why do some URLs show "Reachable" without a specific status code?

Accepted Answer

Due to the browser's cross-origin security policy (CORS), when the target server does not include CORS headers, the request is sent in no-cors mode and returns an opaque response. In this case, although the URL is confirmed reachable, the specific status code cannot be read. This is normal behavior of the browser's security mechanism.

Question 2

Are the check results accurate? How is this different from server-side checking?

Accepted Answer

This tool makes requests from the browser side. Results may be affected by network conditions, CORS policies, browser restrictions, and other factors. Compared to server-side checking, client-side checking may not be able to retrieve complete response headers, and some servers may reject requests from browsers. For precise server-side checking, professional monitoring tools are recommended.

Question 3

What types of URLs are supported?

Accepted Answer

Supports HTTP and HTTPS protocol URLs. If the entered URL does not include a protocol prefix, https:// is automatically added. Entering a complete URL is recommended for the most accurate results. FTP, WebSocket, and other protocols are not supported.

Question 4

Is there a limit on batch checking?

Accepted Answer

For optimal detection efficiency and browser performance, it is recommended to check no more than 50 URLs at a time. The tool checks with 5 concurrent requests to balance speed and avoid excessive load on target servers. For large numbers of URLs, batch processing is recommended.

URL Status Checker

URL Status Checker Usage Guide

Main Features

Status Code Legend

常见问题

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