Last updated: July 29, 2026
Simple Dev Tools is built so that this policy can be short. Every tool on this site runs entirely inside your browser. Nothing you type, paste, or upload JSON, JWTs, certificates, files, or anything else is ever transmitted to our servers or any third party. There is no backend processing your data because there is no backend involved in the tools at all.
Nothing you enter into a tool. Every conversion, decode, hash, format, or validation happens locally in your browser using JavaScript running on your device. Your input never leaves your machine, which means we have no server logs, no database entries, and nothing to hand over even if we wanted to.
We may collect minimal, anonymized analytics about site usage which pages are visited, in aggregate to understand what tools are useful and worth improving. This never includes the content you process with a tool, only the fact that a page was viewed.
Every tool the JSON Formatter, JWT Decoder, Base64 Encoder, Hash Generator, and the rest is a client-side JavaScript function that runs the moment you interact with it. There is no network request fired when you click "Decode" or "Format." You can verify this yourself: open your browser's network tab, use any tool, and you'll see no outgoing requests carrying your input.
This is a deliberate architectural choice, not a marketing claim. It means sensitive data auth tokens, private keys, certificates, internal config files can be pasted into a tool without it ever touching infrastructure we control.
We don't use tracking cookies or advertising cookies. Some tools may use your browser's local storage to remember a preference (like your last-used settings for a tool), but this data stays on your device and is never transmitted anywhere.
We may use privacy-respecting, aggregated analytics to measure traffic at a site level. We do not use third-party scripts that have access to tool input, and we don't integrate ad networks or trackers that profile individual visitors.
If this policy changes, we'll update the date at the top of this page. Since no user data is collected by the tools themselves, there's nothing retroactive to notify anyone about.
Questions about this policy can be sent to the contact address listed on the About page.