Find your focus.
Custom flow timers, distraction-free workspaces, and instant scratchpad notes.
OCAL BROWSER / LESS FRICTION. MORE FLOW.Less friction.
Less friction.
More flow.
Everyday focus.
Bring your tabs, tasks, and ideas together in a browser designed to help you find your focus. Built on a hardened native engine with zero telemetry, automatic tab hibernation, and local AI reasoning.
For Windows 10 & 11 · Free & open source · 100% private
One home for your everyday browsing.Explore features
Reclaim your RAM.
Background tabs hibernate automatically, saving up to 90% memory on heavy sessions.
Keep it yours.
Zero tracking telemetry, encrypted local history, and on-device private AI reasoning.
01 — PURPOSE-BUILT WORKSPACETools that get out of your way.
Tools that get out of your way.
When you need to get things done.
Click a capability below to explore how Ocal refines your everyday browser routine.
FOCUS MODE
Focus Flow & Task Timer
Set 25-minute uninterrupted work blocks with subtle ambient soundscapes, dimmed peripheral tabs, and zero notification popups.
25 min sprintFLOW STATE ON DEMAND
SELECT WORKSPACE MODE
Interactive Architecture
Ocal keeps all modules running natively in C++ without third-party extension overhead.
02 — UNDER THE HOODEngineered for endurance.
Explore GitHub Source Engineered for endurance.
Crafted for privacy.
90% Memory Reduction
Background tabs are serialized to compressed memory after 15 minutes of inactivity, keeping your PC fast even with dozens of tabs open.
Biomarker Defense Guard
Blocks trackers, analytics beacons, and browser fingerprinting scripts at compile time. Zero telemetry leaves your computer.
Built-in Flow Timers
Integrated Pomodoro focus sessions and distraction blockers keep you productive without needing cluttering browser extensions.
Local Context Reasoning
Connect directly to your local Ollama or vLLM instance to summarize tabs and extract data with 100% on-device privacy.
Chrome Extension Support
Install your favorite tools, ad blockers, and developer utilities directly from the Chrome Web Store with full WebExtension compatibility.
Open Source, Always
Every line of code is open on GitHub. Inspect our security architecture, audit releases, or contribute improvements.
Is Ocal Browser based on Chromium?
Yes. Ocal is built on Chromium’s robust rendering base, which means all modern websites, WebGL apps, and Chrome Web Store extensions work seamlessly.
How does background tab hibernation work?
When a tab has been inactive for a set duration (15 minutes by default), Ocal freezes the JS execution context and purges unneeded memory textures to disk. When clicked, it resumes instantly without reloading the page.
Can I import my bookmarks and passwords from Chrome or Edge?
Yes. During first launch, or any time via Settings → Import, you can migrate your bookmarks, history, and search engines with a single click.
Where are my browsing history and focus notes saved?
Everything is saved locally in an encrypted SQLite database on your device (%APPDATA%\Ocal\). We never sync your browsing data to remote servers.
Is Ocal available for mobile devices?
An experimental Android APK is available in our release catalog. The primary desktop build is optimized for Windows 10 and 11 (64-bit).
MAKE ROOM FOR SOMETHING BETTERA fresh start.
A fresh start.
One download away.
Get Ocal Browser for Windows 10 & 11. Free, open source, and built for you.