SpaceDeck, a macOS browser that keeps every web app you use in one window, is now available

LIFE SCAPE, K.K. (head office: Chuo City, Tokyo; representative director: Hisashi Hirajo) released SpaceDeck, a browser for macOS, on September 9, 2026. It comes in three forms, 980 yen a month, 8,800 yen a year, or 19,800 yen paid once, all including tax, and every feature can be tried free for 14 days.

Background: browsers assume one person, one account

Gmail, Slack, Notion. Work now happens inside the browser. Yet the browser was built on the assumption that the person using it has a single account.

Anyone who keeps a work Gmail and a personal Gmail has to switch profiles or open a private window. Each switch opens another window, and a link opens in whichever window happened to be in front. Then the message goes out from the wrong account.

SpaceDeck gives every web app a space of its own. Two accounts on the same service stay signed in side by side. Nothing to switch, nothing to sign out of.

Features

• A separate session for every appGmail, Slack, Notion, Claude, X. Each one has its own space, and cookies and sign-in state never mix. Any number of accounts on the same service can sit side by side.
• A real terminal built inNext to the tabs, a real terminal runs on a pseudo terminal (pty). Commands can be typed on the spot, without leaving the browser.
• Boosts, for rewriting how a site looks and behavesAny web app can be given your own CSS and JavaScript: remove what you never use, change the colors, add a control.
• Reachable from anywhereA global hotkey brings SpaceDeck to the front, even in the middle of another app.
• Exporting a pageThe page you have open can be written out as PDF, Word, Markdown, Obsidian, or a Google Doc.
• Passkeys with Touch IDPasskeys stored in the iCloud Keychain can be used from the Touch ID sheet. A browser on macOS needs individual approval from Apple to use this, and SpaceDeck received it in September 2026.
• 32 languagesEvery string in the interface is translated into 32 languages, each of them complete.

Price and requirements

SpaceDeck is 980 yen a month, 8,800 yen a year, or 19,800 yen paid once, all including tax. Every feature can be tried free for 14 days, with no credit card required.

It runs on macOS 12 Monterey or later, with macOS 13 or later recommended, on both Apple Silicon and Intel. The build is signed and notarized.