CloakBrowser

Stealth Chromium that passes every bot detection test.

Drop-in Playwright/Puppeteer replacement. Same API — just swap the import. Scores 0.9 on reCAPTCHA v3, passes Cloudflare Turnstile, and clears 30/30 stealth detection tests.

• 🔒 16 source-level C++ patches — not JS injection, not config flags
• 🎯 0.9 reCAPTCHA v3 score — human-level, server-verified
• ☁️ Passes Cloudflare Turnstile, FingerprintJS, BrowserScan — 30/30 tests
• 🔄 Drop-in replacement — works with both Playwright and Puppeteer
• 📦 npm install cloakbrowser — binary auto-downloads, zero config

Install

# With Playwright
npm install cloakbrowser playwright-core

# With Puppeteer
npm install cloakbrowser puppeteer-core

On first launch, the stealth Chromium binary auto-downloads (~200MB, cached at ~/.cloakbrowser/).

Usage

Playwright (default)

import { launch } from 'cloakbrowser';

const browser = await launch();
const page = await browser.newPage();
await page.goto('https://protected-site.com');
console.log(await page.title());
await browser.close();

Puppeteer

Note: Playwright is recommended for sites with reCAPTCHA Enterprise. Puppeteer's CDP protocol leaks automation signals that reCAPTCHA Enterprise can detect. This is a known Puppeteer limitation, not specific to CloakBrowser.

import { launch } from 'cloakbrowser/puppeteer';

const browser = await launch();
const page = await browser.newPage();
await page.goto('https://protected-site.com');
console.log(await page.title());
await browser.close();

Options

import { launch, launchContext } from 'cloakbrowser';

// With proxy
const browser = await launch({
  proxy: 'http://user:pass@proxy:8080',
});

// Headed mode (visible browser window)
const browser = await launch({ headless: false });

// Extra Chrome args
const browser = await launch({
  args: ['--window-size=1920,1080'],
});

// Browser + context in one call
const context = await launchContext({
  userAgent: 'Custom UA',
  viewport: { width: 1920, height: 1080 },
  locale: 'en-US',
  timezoneId: 'America/New_York',
});

Utilities

import { ensureBinary, clearCache, binaryInfo, checkForUpdate } from 'cloakbrowser';

// Pre-download binary (e.g., during Docker build)
await ensureBinary();

// Check installation
console.log(binaryInfo());

// Force re-download
clearCache();

// Manually check for newer Chromium version
const newVersion = await checkForUpdate();
if (newVersion) console.log(`Updated to ${newVersion}`);

Test Results

| Detection Service | Stock Browser | CloakBrowser | |---|---|---| | reCAPTCHA v3 | 0.1 (bot) | 0.9 (human) | | Cloudflare Turnstile | FAIL | PASS | | FingerprintJS | DETECTED | PASS | | BrowserScan | DETECTED | NORMAL (4/4) | | bot.incolumitas.com | 13 fails | 1 fail | | navigator.webdriver | true | false |

Configuration

| Env Variable | Default | Description | |---|---|---| | CLOAKBROWSER_BINARY_PATH | — | Skip download, use a local Chromium binary | | CLOAKBROWSER_CACHE_DIR | ~/.cloakbrowser | Binary cache directory | | CLOAKBROWSER_DOWNLOAD_URL | cloakbrowser.dev | Custom download URL | | CLOAKBROWSER_AUTO_UPDATE | true | Set to false to disable background update checks |

Migrate From Playwright

- import { chromium } from 'playwright';
- const browser = await chromium.launch();
+ import { launch } from 'cloakbrowser';
+ const browser = await launch();

const page = await browser.newPage();
// ... rest of your code works unchanged

Platforms

| Platform | Status | |---|---| | Linux x86_64 | ✅ Available | | macOS arm64 (Apple Silicon) | ✅ Available | | macOS x86_64 (Intel) | ✅ Available | | Windows | Planned |

On Windows? You can still use CloakBrowser via Docker or with your own Chromium binary by setting CLOAKBROWSER_BINARY_PATH=/path/to/chrome.

Requirements

• Node.js >= 18
• One of: playwright-core >= 1.40 or puppeteer-core >= 21

Links

• 🌐 Website
• 🐛 Bug reports & feature requests
• 📦 PyPI (Python package)
• 📖 Full documentation
• 📧 Contact: [email protected]

License

MIT — see LICENSE.