2026-05-20 · 4 min read
Online formatters are convenient but many send your paste to a remote server for processing. For production JWTs, customer exports, or proprietary MATLAB calibrations, that is an unacceptable data path.
What client-side means
JavaScript in your browser performs the transformation. No upload occurs unless the tool explicitly calls an API. Flashman is designed around this model for everyday developer utilities.
Still exercise caution
Client-side processing removes server retention risk; it does not replace good operational security.
- Malicious browser extensions can read the DOM
- Shared computers may retain clipboard history
- Screenshots and screen sharing expose content