Capsomnia is Caps Lock keeps your Mac awake, even with the lid closed

Yes, Capsomnia is completely free and open source under the MIT license.

How much does Capsomnia cost?

Capsomnia uses a free pricing model. Visit the official website for current pricing details.

Jul 26, 2026

Capsomnia

Q: What are the main features of Capsomnia?

Capsomnia includes features such as Toggle sleep prevention by pressing Caps Lock, Caps Lock LED indicator shows anti-sleep status, Works with lid closed for uninterrupted background tasks, Customizable hotkey if Caps Lock is already in use, Open source under MIT license with transparent security model.

Caps Lock keeps your Mac awake, even with the lid closed

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Overview

What is Capsomnia?

Capsomnia is a free, open-source macOS app that turns the Caps Lock key into a physical anti-sleep switch, allowing your MacBook to stay awake and continue running background tasks even when the lid is closed.

Caps Lock keeps your Mac awake, even with the lid closed

Core Features

Toggle sleep prevention by pressing Caps Lock

Caps Lock LED indicator shows anti-sleep status

Works with lid closed for uninterrupted background tasks

Customizable hotkey if Caps Lock is already in use

Open source under MIT license with transparent security model

Supports macOS 14+

Popular Use Cases

Keep AI agent tasks (Codex, Claude Code) running with lid closed
Maintain SSH sessions without device sleep
Complete long builds and large downloads
Keep mobile coding sessions (Codex Mobile) connected

How to use

Download and install Capsomnia from the official website or GitHub.
Open the app; it runs as a menu bar application.
Press Caps Lock to enable anti-sleep mode (LED lights up).
Close your MacBook lid; tasks continue running.
Press Caps Lock again to disable anti-sleep and restore normal sleep behavior.
Optionally configure a custom hotkey in settings if Caps Lock is used for other functions.

Product Timeline

To be verified

Pricing

Capsomnia uses a Free pricing model. Pricing and features may change over time.

Free

To be verified

Pro

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Team

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Enterprise

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Deal / Coupon

No coupon listed.

Verification

Tool status

To be verified

Pricing verified

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Founder claimed

No / To be verified

Source

Official website / Community submitted

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