cloakbrowser
Stealth Chromium that passes every bot detection test. Drop-in Playwright replacement with source-level fingerprint patches.
Decision gist · record as of 2026-08-14
Yes, if you need to automate against anti-bot-protected sites and are comfortable with the licensing model (free single-session tier, Pro for production concurrency). The source-level patching approach is genuinely different from JavaScript-injection tools and remains actively maintained. No known vulnerabilities. Install friction is low and the API is familiar to Playwright users. Verify that the specific anti-bot systems you target are covered before committing to production.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- On first run, a ~200MB stealth Chromium binary is automatically downloaded and cached locally.
- Free tier allows one concurrent session; Pro license required for higher concurrency.
- Low friction: pure Python wheel with three stable runtime dependencies (cryptography, httpx, playwright).
License · maintenance · safety
MIT (permissive) — MIT license permits commercial and private use with minimal restrictions, making it suitable for production automation and scraping workflows.
last release 2026-08-11 (3 days) · last repo commit 2026-08-11 · 30,052 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 734,769 downloads/mo, #5,196 on PyPI
Alternatives
Verify before relying
pip install cloakbrowser
from cloakbrowser import launch
browser = launch()
page = browser.new_page()
page.goto("https://example.com")
browser.close()- Whether the 71 source-level C++ patches remain effective as Chromium versions advance and detection systems evolve.
- Actual success rates against specific anti-bot systems (Kasada, DataDome, etc.) beyond the mentioned test sites.
- Whether the free tier's single concurrent session limit is enforced per machine or per license key globally.
What it is and what it does
CloakBrowser is a drop-in Playwright replacement that wraps a modified Chromium binary with fingerprint patches applied at the C++ source level. Instead of injecting JavaScript or tweaking launch flags—which detection systems recognize and block—it ships a real Chromium binary where canvas rendering, WebGL, audio, GPU reporting, WebRTC, and automation signals are altered at compilation time. The result is a browser that antibot systems score as legitimate because it behaves like one.
You use it exactly like Playwright: call `launch()`, create pages, navigate, and interact. The package handles binary download on first run and supports both free (single session) and Pro (concurrent scaling) modes. It includes optional humanization (mouse curves, keyboard timing, scroll patterns) and can auto-detect timezone and locale from a proxy IP. Common use cases are web scraping, QA automation, and AI agent integration where bot detection would otherwise block access.
Use it for
- Scrape sites protected by Cloudflare Turnstile or similar bot detection without solving CAPTCHAs.
- Run automated QA or monitoring workflows against anti-bot-protected targets without triggering blocks.
- Integrate stealth browsing into AI agents and automation frameworks (browser-use, Crawl4AI, LangChain).
- Test fingerprint detection systems by running a real browser with modified hardware/rendering signatures.
- Scale concurrent browser sessions in production with a Pro license while maintaining detection evasion.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need to automate against anti-bot-protected sites and are comfortable with the licensing model (free single-session tier, Pro for production concurrency).
The source-level patching approach is genuinely different from JavaScript-injection tools and remains actively maintained. No known vulnerabilities. Install friction is low and the API is familiar to Playwright users. Verify that the specific anti-bot systems you target are covered before committing to production.
Install
cloakbrowser on PyPI
Before you install
Low friction: pure Python wheel with three stable runtime dependencies (cryptography, httpx, playwright). Active maintenance—released 3 days ago with 30052 repository stars and continuous updates. Requires Python 3.9+.
On first run, a ~200MB stealth Chromium binary is automatically downloaded and cached locally. Free tier allows one concurrent session; Pro license required for higher concurrency.
License in practice
MIT license permits commercial and private use with minimal restrictions, making it suitable for production automation and scraping workflows.
Quickstart
pip install cloakbrowser
from cloakbrowser import launch
browser = launch()
page = browser.new_page()
page.goto("https://example.com")
browser.close()Verify before relying
- Whether the 71 source-level C++ patches remain effective as Chromium versions advance and detection systems evolve.
- Actual success rates against specific anti-bot systems (Kasada, DataDome, etc.) beyond the mentioned test sites.
- Whether the free tier's single concurrent session limit is enforced per machine or per license key globally.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 3 packagescryptographyhttpxplaywright |
| Maintenance | Actively maintained 3 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 734,769 / month, #5,196 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.9Topic :: Internet :: WWW/HTTP :: BrowsersTopic :: Software Development :: Libraries :: Python ModulesTopic :: Software Development :: Testing |
Evidence: cloakbrowser-0.5.7-py3-none-any.whl
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See also pydoll-python · tf-playwright-stealth · camoufox · cloudscraper · undetected-chromedriver · playwright-stealth · patchright · nodriver · rebrowser-playwright · apify-fingerprint-datapoints