Privacy Policy
Last updated: August 2026
Your data stays in your browser
All tools on Developer Toolbox process data locally in your browser using JavaScript and native web APIs. When you format JSON, decode a JWT, generate a hash, or convert YAML, the data you enter is never transmitted to our servers. There is no upload step — the processing code runs on your machine.
No account required
Developer Toolbox does not require registration and does not collect names, email addresses, or profiles. There are no user accounts.
Local browser storage
We use your browser's local storage only for non-sensitive interface preferences: your theme choice, favorite tools, and recently used tools. We never persist tool inputs, secrets, tokens, passwords, or any data you process. You can clear these preferences at any time through your browser settings.
Advertising
The site may display advertisements served by Google AdSense to keep the tools free. Ad providers may use cookies as described in their own privacy policies. Advertising never has access to the data you enter into the tools — that data stays in the tool on your machine.
A note on secrets
Even though our tools run locally, it is good practice to never enter production secrets, private keys, or sensitive credentials into any website you do not fully trust. For production workloads, prefer audited command-line tools and libraries running in your own environment.