Privacy Policy

1. Data you enter into the tools

Every DevNest tool — including the JSON Formatter, JWT Decoder, Regex Tester, Base64 and URL encoders, Hash Generator, UUID Generator and Timestamp Converter — processes your input locally using JavaScript in your browser. The text, tokens and files you paste, type, choose or generate:

• are never sent to our servers or any third party;
• are not saved — they disappear when you close or reload the page (apart from the brief hand-off between tools described below);
• are not logged, analysed or used for any other purpose.

Files you select in the Hash Generator, and .json files you open in the JSON Formatter, are read directly by your browser and are never uploaded.

Passing data between tools. When you use an “Open in…” button (for example, opening a JWT payload in the JSON Formatter) or paste data into the tool search, the value is placed in your browser's session storage for this tab under the key devnest:handoff, so the next tool can pick it up. It is deleted as soon as that tool opens, is never put in the page address and never leaves your device. Session storage is cleared automatically when you close the tab.

2. Information stored on your device

If you choose a light or dark theme, that preference is saved in your browser's local storage under the key theme so it is remembered next time. It never leaves your device and you can clear it at any time through your browser settings. Selecting “System” removes it.

To show Recently used tools in the tool search, DevNest also keeps a short list of the last few tool pages you opened (for example /jwt-decoder) in local storage under the key devnest:recent-tools. It contains only page addresses — never anything you type into a tool — and it never leaves your device. Clearing your browser's site data removes it.

Tool settings — such as JSON indentation, Base64 URL-safe mode, UUID count and format, hash output format and the Timestamp Converter's time zone — are remembered in local storage under keys starting with devnest:pref:. These hold only settings, never the data you enter.

DevNest does not use cookies.

3. Clipboard access

The Copy and Paste buttons use your browser's clipboard only when you click them. Your browser may ask for permission before allowing a paste. We never read your clipboard in the background.

4. Analytics, tracking and advertising

DevNest does not use analytics, tracking pixels, advertising networks or third-party scripts. Fonts are served from the same site, so loading a page does not contact external font services.

5. Hosting and server logs

Like any website, the server or hosting provider that delivers these pages may automatically record standard technical information for each request — such as IP address, browser type and the time of the request — for security and reliability. These logs never contain the data you enter into the tools, because that data is never sent to the server.

6. Children's privacy

DevNest is a general-purpose developer tool and does not knowingly collect personal information from anyone, including children.

7. Changes to this policy

We may update this policy from time to time. Changes take effect when posted on this page, and the “Last updated” date above will change accordingly.

Please also read our Terms of Use, which explain that the tools are provided as is and used at your own risk.