Privacy Policyプライバシーポリシー

Short version: KeyUp is a local-only Chrome extension. It never reads the content of what you type, never sends anything to a server, and has no analytics, accounts, ads, or tracking.

What KeyUp does

KeyUp listens to keyboard and mouse events on the pages you visit and plays sound effects in response. That is its entire function. The extension runs in your browser only — there is no KeyUp server.

Data we collect

None. KeyUp does not collect, store, transmit, or share any of the following:

• The characters or text you type
• The contents of pages you visit
• URLs, browsing history, or tab information
• Your IP address, location, or device identifiers
• Analytics, telemetry, or usage statistics
• Personal information of any kind

Key-event detection ≠ key logging

KeyUp needs to know that a key was pressed in order to trigger a sound. It does not read, buffer, store, or transmit which characters were typed. The extension reacts to the event and immediately discards it.

Local settings storage

Your preferences (volume, active theme, typing-SE on/off, etc.) are stored locally using chrome.storage.sync. This uses Chrome's own account sync if you are signed in to Chrome, so your settings follow you across devices — but this data stays entirely within Google's Chrome infrastructure and never touches any KeyUp-operated server.

You can clear these settings at any time by removing the extension.

Permissions explained

Here is every permission KeyUp's manifest.json requests, and why:

host_permissions: <all_urls>

Allows the extension to inject its content script into any page you type on — Gmail, Docs, Notion, your own apps, and so on. Without this the extension cannot react to keystrokes anywhere.

content_scripts on <all_urls>

The content script is a tiny listener for keydown / mousedown events. It forwards a trigger (not the key content) to the extension's audio layer.

storage

Saves your settings (volume, theme, toggles) via chrome.storage.sync. No page content is ever written to storage.

offscreen

Chrome Manifest V3 service workers cannot play audio directly. KeyUp uses an offscreen document — a hidden in-extension page — solely for playing sound effect files bundled with the extension.

Third parties

KeyUp does not use analytics, ads, trackers, remote configuration, or any third-party SDK. The extension ships with all audio assets bundled — no audio is streamed from a network.

This landing page (keyup.app) loads Google Fonts and the Tailwind CDN for styling. Those requests are made by the website, not by the extension itself.

Children's privacy

KeyUp is suitable for all ages and does not collect any information, from children or otherwise.

Changes to this policy

If the policy ever changes (for example, if a future premium theme introduces optional cloud features), we will update the "Last updated" date at the top of this page and highlight changes on the landing page.

Contact

Questions, concerns, or bug reports: contact@akizony.com.