Privacy & Security
Last updated: 2026-05-03
The one-sentence version
Every operation - encryption, decoding, hashing, steganography, analysis - runs entirely inside your browser. Your input never leaves your device. There are no servers. There is nothing to leak.
What we collect
| Data type | Sent to server? | Stored? |
|---|---|---|
| Tool inputs (text, files, keys, passwords) | Never | Not persisted |
| Analytics / usage | Never | Nothing collected |
| Cookies | None set | No server, no cookies |
| IP address | Never logged by CyberTools | GitHub Pages may log standard hosting metadata (see below) |
| Theme preference, recent tools | Never | localStorage only (stays on your device) |
How to verify this yourself - in 60 seconds
Trust should not require faith. Open DevTools and check for yourself:
- Open any CyberTools page in your browser.
- Open DevTools:
F12(Windows/Linux) orCmd+Option+I(Mac). - Click the Network tab. Click the clear button (🚫) to empty the log.
- Use a tool - paste text, encode something, decrypt a JWT, compute a hash.
- Observe the Network tab. Zero new requests will appear after the initial page load. Your data stayed entirely in your browser.
localStorage usage
CyberTools uses your browser's localStorage for the following - this data never leaves your device:
ct-theme- your dark/light preference.ct-history- the last 10 tools you visited (IDs only, no input data).ct-favorites- tools you have starred.ct-visit-count- visit count for the PWA install prompt.ct-install-dismissed- whether you dismissed the install prompt.
To clear everything: open your browser's DevTools → Application → Storage → Clear Site Data.
Third-party dependencies
CyberTools self-hosts every dependency. No external CDN requests are made at runtime. All assets are served from the same origin.
| Dependency | Purpose | Source |
|---|---|---|
| Tailwind CSS | Styling utilities | Built locally, committed to repo |
| Inter font | UI typography | Self-hosted woff2 |
| JetBrains Mono | Code/output typography | Self-hosted woff2 |
Open-source transparency
CyberTools is fully open-source under the MIT License. Every line of code is publicly auditable. If you find a discrepancy between this policy and the code, the code is authoritative - and we'd appreciate a bug report.
GitHub Pages hosting
CyberTools is hosted on GitHub Pages. GitHub may collect standard web server logs (IP address, timestamp, user-agent) as part of serving the static files. This is GitHub's standard infrastructure logging and is outside of CyberTools' control. See GitHub's privacy statement for details. CyberTools itself adds zero tracking on top of this.