Workspace browser · open-source based · free

A browser that's part of your workspace.

Culltron Browser Max is a focused, privacy-aware browser built on proven open-source technology — native to the ecosystem, governed by Sentinel, and Aria-ready in Ultra X27 and Secure. The web, inside Culltron.

Culltron Workspace

Docs

culltron.app/workspace Secured

Workspace

Docs

App Hub

Pinned

Ask Aria about this page — Ultra & Secure

Built different

Focused, private, and yours.

Workspace-native

Tabs, pins and sessions live inside your Culltron workspace — not a separate silo.

Private by default

Tracker and fingerprint resistance on by default. Your browsing stays yours.

Governed by Sentinel

Sandboxed and host-allow-listed — every page runs under Sentinel’s rules.

Aria in Ultra & Secure

Ask Aria to summarise, extract or act on a page — in Ultra X27 and the Secure OS.

Open-source based

Built on proven open-source browser technology, with public attributions.

Fast & local-first

Lightweight, responsive, and offline-aware — opens with the rest of your OS.

Built on open-source technology.

Culltron Browser Max is built on proven open-source browser technology. We publish full attributions and licenses in our open-source notices, and contribute fixes upstream where we can.

Open-source notices

The web, inside Culltron

Browse as part of your workspace.

Free with Culltron OS and the Secure edition. Private by default, governed by Sentinel, Aria-ready in Ultra X27.

Review release status Explore OS Secure

Browser Max in depth

Browser Max

A controlled browser workspace for allow-listed HTTPS sites.

Navigation limited to an exact allow-list of HTTPS hosts. URLs with credentials, IP addresses, localhost and non-default ports are refused.
Pages are sandboxed with no popups, no downloads and no referrer. Other sites open in your normal browser.
Local bookmarks, and a decision log you can clear after confirming.
An optional local managed-policy file, enforced only once its exact bytes are pinned by SHA-256.

Ultra X27: adds up to 30 named research workspaces, each with up to 20 pages in up to eight groups, with reviewed import and export.

Limits: It is not a VPN, a tracker blocker or browser profile sync. Policy enforcement is local, not device management (MDM).

How it works

It is a separate desktop product on Culltron's shared, hardened platform, with its own full editor and local workspace.
A local, authenticated runtime serves the editor. Your files stay on your machine.
A signed licence lease unlocks the paid edition, and Ultra X27 features are enforced by the server, not just hidden.
Changes write new copies, usually with checksum receipts, so originals are not overwritten.

Frequently asked questions

Does Browser Max work offline?

Yes. The core editor runs locally through Culltron's runtime on your own machine and keeps files in a local folder.

What does Ultra X27 add?

Ultra X27 adds up to 30 named research workspaces, each with up to 20 pages in up to eight groups, with reviewed import and export.

What are the limits of Browser Max?

It is not a VPN, a tracker blocker or browser profile sync. Policy enforcement is local, not device management (MDM).

Can I download Browser Max today?

Not yet publicly. Builds are tested, but a public download appears only after signing, checksum verification and release approval.

Release status: built and tested in the repository. A public download appears only after signing, checksum verification and release approval; see Downloads. Source of these facts: the product's engineering README.