Chrome Flags Reference

Chrome command line switches and startup flags for automation, headless mode, and debugging.

--allow-insecure-localhost

What does --allow-insecure-localhost do?

Enables TLS/SSL errors on localhost to be ignored (no interstitial, no blocking of requests).

Usage

CLILaunch Chrome with --allow-insecure-localhost using CLI

chrome --allow-insecure-localhost

PuppeteerLaunch Chrome with --allow-insecure-localhost using Puppeteer

const browser = await puppeteer.launch({
  args: ['--allow-insecure-localhost']
});

PlaywrightLaunch Chrome with --allow-insecure-localhost using Playwright

const browser = await chromium.launch({
  args: ['--allow-insecure-localhost']
});

SeleniumLaunch Chrome with --allow-insecure-localhost using Selenium

from selenium import webdriver

options = webdriver.ChromeOptions()
options.add_argument('--allow-insecure-localhost')

driver = webdriver.Chrome(options=options)