Private by design
Every tool here runs as JavaScript in your browser tab. Input such as JSON payloads, configuration files, regex test strings or generated secrets stays on your device. Some tools keep recent input or favourites in local storage so you can pick up where you left off; clearing site data removes it.
What these tools cannot do
They check syntax and apply known rules quickly. They do not compile your project, run your test suite or replace official validators such as the W3C validator or Google's Rich Results Test. Review generated code before you commit it.
Frequently asked questions
Is my code or data uploaded anywhere?
No. The tools run in your browser tab. JSON, code, passwords and other input are processed on your device and are not sent to a server.
Do I need an account or install anything?
No. Open a tool and start typing. Some tools remember recent input or settings in your browser's local storage, which you can clear at any time.
Are generated passwords and UUIDs secure?
They use the browser's crypto.getRandomValues cryptographic random generator. Store passwords in a password manager and keep database unique constraints for IDs.
Can these tools replace my build pipeline or validators?
They are for quick checks and conversions. For production, keep linters, compilers, official validators and tests in your pipeline.