Localhost detector

Detects if you are accessing localhost or production and respectively shows prominent red banner only on localhost.
What is Localhost detector?
Localhost detector is a Chrome extension that checks the URL for various patterns indicating localhost or production access and adds a red banner only on localhost for easy identification.

Extension stats

Users: 277 ▲ 6
Rating: 4.00 (5)
Version: 0.3 (Last updated: 2019-04-25)
Creation date: 2019-04-25
Risk impact: Low risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
Size: 38.70K

Other platforms

Not available on Firefox
Not available on Edge
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Extension summary

It checks the following in the URL and adds the red banner:

  1. "localhost"
  2. "127.0.0.1"
  3. "local."
  4. ".local"
  5. "staging."
  6. ".stg"
  7. "dev."
  8. "test."
  9. ".test"

Let me know, if you want to add any other string that should match and show the red banner.

User reviews

I like the idea. Unfortunately, there are sites that have dev in them that this triggers on, like `dev.azure.com` for example. This means I have the banner popup in places it shouldn't be. Without any ability to customize the matching I had to uninstall. It's a cool idea though!
by Sheldon Hull, 2023-05-22

Simple and useful.
by Lec “Lecpo” Pol, 2019-04-12

Extensão TOP, procurei bastante e não encontrei, quando achei aqui não acreditei de primeira, mas funciona perfeitamente para localhost com ou sem porta! Parabéns ao criador.
by Herbert Smith, 2019-02-04
View all user reviews

Extension safety

Risk impact

Localhost detector requires very minimum permissions.

Risk likelihood

Localhost detector has earned a good reputation and can be trusted.

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