About Flashman
Free browser-based developer tools: JSON, JWT, Base64, YAML, MATLAB/Simulink helpers, and more. Fast, private, and client-side.
Why we built this
Developers and domain automation engineers need fast, trustworthy utilities without uploading sensitive payloads to unknown servers. Flashman runs transformations in your browser whenever possible and keeps the interface minimal.
What you will find
24+ tools across encoding, formatting, generation, conversion, debugging, text utilities, and MATLAB/Simulink helpers. We also publish 10 original guides on topics like JWT safety, JSON validation, cron schedules, and client-side privacy.
Editorial policy
Guides and tool descriptions are written for accuracy and clarity, not keyword stuffing. We update content when behavior changes or readers report mistakes. Tool output should always be verified before production or safety-critical use—see our Disclaimer.
Funding
The site may display non-intrusive advertising (e.g. Google AdSense) to cover hosting costs. Ads never replace our commitment to client-side processing for tool input.
Contact & feedback
Flashman is operated by Rahul Chitturi. For questions, tool ideas, or issue reports, email rahulchitturi888@gmail.com or use the contact page.