Your browser researchcommand center.
Launch multiple sandboxed Chrome instances, each with its own fingerprint and proxy. Execute scripts across all of them via CDP. Debug with DevTools or Charles. No noise, no clutter.
How It Works
Research-grade browser control
Not just a downloader. A complete environment for running, controlling, and debugging multiple browser instances.
CDP script execution
Execute JavaScript across all running instances at once. Direct Chrome DevTools Protocol, not Selenium. Collect canvas fingerprints, run DOM analysis, navigate pages.
Multi-instance control
Run 10 browsers simultaneously. Different versions, different proxies. Control them all from one place.
True sandboxing
Each instance is fully isolated. Cookies, localStorage, cache, all completely separate. Clean slate every time.
Native fingerprints
Each Chrome version has its authentic fingerprint. No spoofing, real browser signatures.
Per-session proxy
HTTP, HTTPS, SOCKS5. Different proxy per browser. No system-wide VPN toggling.
DevTools & Charles ready
Auto-open DevTools on launch. Pre-configured Charles mode. Clean traffic, zero noise.
The App
Explore PhaseLab
A native macOS app built with Swift. Lightweight, fast, and designed for power users.
PhaseLab
Instance Control Center
Launch and manage multiple Chrome/Chromium instances. See all running sessions, their versions, and status at a glance.
Use cases
Built for how you actually work
Whether you're researching antibot systems, debugging web apps, or managing multiple sessions, PhaseLab gives you the control you need.
Antibot & security research
Study how detection systems work. Run the same page across 10 browser versions, each with different proxies. Compare responses, analyze fingerprint checks, understand what triggers blocks.
Research fingerprinting, detection & bypass systems
JavaScript debugging
Debug obfuscated JS, study how sites behave, trace API calls. Launch with DevTools pre-opened or route through Charles for clean network analysis. No pollution from your main browser.
Clean debugging environment, zero noise
Fingerprint collection
Need canvas fingerprints from Chrome 89? WebGL data from 10 versions? Execute a script across all instances and collect results. Each version has its authentic, native fingerprint.
Batch-execute scripts, collect real fingerprints
Multi-session workflows
Run multiple isolated sessions on strict sites. Each with its own cookies, proxy, and fingerprint. Navigate all instances to the same URL with one click. Great for comparison testing or parallel access.
10 sessions, 10 proxies, fully isolated
Extension development
Build extensions and test across Chrome versions. Drag & drop your .crx or unpacked folder, auto-injected on every launch. Test on Beta or Canary before changes ship to users.
Test on any Chrome version instantly
Web scraping research
Study how sites detect automation. Test your scraping logic across real browser instances before writing code. Understand what works and what gets blocked, without touching Selenium.
CDP-based, not Selenium. Lighter and faster
Under the hood
Built for power users
This isn't a Chrome downloader with a GUI. It's a proper research toolkit with CDP integration, sandboxing, and orchestration built in.
CDP, not Selenium
Direct Chrome DevTools Protocol integration. No webdriver detection, no extra processes. Execute scripts, navigate, collect data. Lightweight and fast.
Broadcast to all instances
Run a script on all active browsers at once. Navigate them all to the same URL. Collect results from each. Built for parallel workflows.
True sandboxing
Each instance uses a separate user data directory. Cookies, localStorage, IndexedDB, all completely isolated. No cross-contamination.
Native fingerprints
No spoofing. Each version has its real, authentic fingerprint. Canvas, WebGL, user agent, all genuine to that Chrome build.
Per-session proxies
HTTP, HTTPS, SOCKS5, assigned per instance. Run 10 browsers with 10 different IPs. No system-wide proxy switching.
Official Google sources
Chrome for Testing API and Chromium archives. No third-party binaries. The same builds Google publishes.
FAQ
Questions
Start researching smarter
Launch sandboxed instances, execute scripts, debug cleanly. All from one app.
macOS 12.0+ • Intel & Apple Silicon • Cancel anytime