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Last updated: 2026-03-23
localStorage stores only UI preferences — theme and indent size. Your input content is never written to disk.We collect nothing from your input or output. The text you paste into the editor, the files you open, and the results you copy out never leave your device.
The only data we receive is aggregate, anonymous traffic information via Plausible Analytics. Specifically, Plausible records:
/json-formatter) and referrer sourcePlausible does not use cookies, does not fingerprint your browser, does not track you across sites, and is fully GDPR compliant. Data is hosted in the EU. You can read their full data policy at plausible.io/data-policy.
formatvault is a static web application. When you visit a tool page, your browser downloads the JavaScript bundle from our CDN and executes it locally. From that point on, all processing is self-contained:
JSON.parse / JSON.stringify (or json5 for relaxed syntax)papaparse running in a Web Worker — large files never block the main thread and never touch a serverjose entirely in-memory — the signature is not verified, and the token payload is not transmittedjs-base64; URL strings use native encodeURIComponent / decodeURIComponentmarked then sanitised through DOMPurify before display — no raw HTML is ever injectedFiles larger than 1 MB are processed in a dedicated Web Worker using a streaming parser so that your data is handled efficiently without any network round-trips. Sensitive payloads — API responses, authentication tokens, configuration files, financial CSVs — can be pasted with confidence.
We write two preference keys to localStorage:
fv-theme — your colour scheme preference ("dark" or "light")fv-settings — editor preferences such as indent size and tab styleInput content — the text you type or paste into any editor — is never written to localStorage or any other browser storage API. It exists only in JavaScript memory for the duration of your session and is discarded when you navigate away or close the tab.
You can clear all formatvault preferences at any time from your browser's developer tools (Application → Local Storage) or by clearing site data in your browser settings.
Page view analytics via plausible.io. Cookieless, no personal data stored, GDPR/CCPA compliant, EU-hosted. The script is loaded from plausible.io/js/script.js and sends a single event per page navigation containing only the page path and the data listed under "What we collect" above.
Fonts (DM Sans, JetBrains Mono, Geist) are loaded from fonts.googleapis.com. This means your browser makes a request to Google's CDN when you first visit the site. Google may log the request IP address and user-agent as part of standard CDN operation. We have no control over that data. If you prefer not to contact Google's servers, you can block the domain in your browser — the site will fall back to system fonts.
The site is hosted on Cloudflare Pages and served through Cloudflare's CDN. Cloudflare processes HTTP requests in order to serve assets and provides DDoS protection and edge caching. Cloudflare may log request metadata (IP, headers) for security and operational purposes in accordance with their own privacy policy. No application-level user data is accessible to or stored by Cloudflare.
Under GDPR, CCPA, and similar regulations you have rights to access, correct, delete, and export personal data held about you. Because formatvault does not collect or store any personal data about individual users, these rights are trivially satisfied — there is nothing for us to provide, correct, or delete.
The only aggregate analytics data we hold (via Plausible) is not linked to any individual and cannot identify you. If you have questions about what Plausible holds, refer to their privacy policy.
Questions about this policy? Email [email protected]. We'll respond within a reasonable time.