Dashboard
Safe security playground.
Welcome.
Your development and security playground is ready.
Terminal
Safe sandbox commands plus approved local companion actions.
Plugins
Detect Node.js, npm, Git and Python installed on this PC.
File Integrity Lab
Generate and compare SHA-256 file fingerprints.
Terminal
Companion commands can open a real CMD or PowerShell window.
File Integrity Lab
Generate a SHA-256 fingerprint for a file and compare it with an expected hash.
Encoder Lab
Encode and decode text using common developer formats.
Local Web Tester
Check whether a local development server is online.
Code Lab
Write, preview and test code inside HLH.
Encoder Lab
Base64, URL encoding and hexadecimal conversion.
Local Web Tester
Check localhost development servers through HLH Companion.
HLH Code Lab
Write and test code in a browser sandbox.
Output
HLH API Lab
Send HTTP requests and inspect API responses.
Response
No request sent yet.
No response headers yet.
Code Library
Save code in this browser, your HLH account, or your PC.
HLH Companion
Detect developer tools installed on this computer.
Profile settings
Change your display name and avatar.