Privacy

The short version: nothing leaves your browser. Every tool on useformatter.dev — the JSON formatter, unescape, Base64, URL, JWT, timestamp, UUID, hash, and HMAC tools — runs entirely on your device. The text, tokens, keys, and files you work with are never sent to a server.

How the tools work

Each page ships the JavaScript it needs, and all processing happens locally: parsing, formatting, encoding, hashing, and signature verification use your browser's own APIs (like Web Crypto). You can verify this yourself — open your browser's developer tools and watch the network panel while you use a tool, or load a page and switch off your connection: everything keeps working offline.

What stays on your device

For convenience, the tools remember a few things in your browser's localStorage:

• your theme choice and per-tool settings (tab size, deep unescape),
• your most recent inputs — including JWT and HMAC keys — so they survive a page reload.

This data is stored only in your browser, is never transmitted anywhere, and you can remove it at any time by clearing the site's data in your browser settings.

What we don't do

• No accounts, sign-ups, or paywalls.
• No server-side processing or logging of anything you paste, type, or drop.
• No selling or sharing of your data — we never have it in the first place.

Advertising

This site is supported by ads served by Google AdSense. Third-party vendors, including Google, may use cookies or device identifiers to serve ads based on your prior visits to this or other websites. This is the only part of the site that involves third-party data collection, and it never sees the content you work with in the tools. You can learn more, or opt out of personalized advertising, in Google's advertising policies and Ads Settings.

Changes

If how the site works ever changes, this page will say so plainly. Last updated: July 19, 2026.