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HTTP 502 Bad Gateway

What HTTP 502 Bad Gateway means: a proxy got no valid answer from the app behind it. Causes and fixes.

In your browser

No status code matches that.

About this tool

A 502 comes from a proxy or load balancer, such as Nginx or Cloudflare, that couldn’t get a valid response from the application behind it. Usually the app has crashed, is restarting or is overloaded.

How to use it

  1. 1 Type a code, such as 404, or a word, such as redirect.
  2. 2 Read what it means and when it’s used.

Questions

Is my data uploaded?

No. This tool runs in your browser, so your text and files never reach our server.

Is this tool free?

Yes. It’s free to use with no sign-up and no limits for normal use.