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Everything you might want to know about LocalOnly, from privacy and offline use to pricing, ads, and browser support.
No. Every tool on LocalOnly runs entirely in your browser using standard web APIs. The text, files, and JSON you work with are processed on your own device and are never sent to a server. You can confirm this by watching your browser's network tab while you use a tool.
Yes. There is no backend that could receive, store, or inspect your content, and we do not track what you process. The only data that ever persists is a few optional preferences stored locally in your browser, which never leave your device.
Yes. Because there is no server involved in processing your data, the tools keep working without an internet connection. After your first visit the app is cached, so you can continue using it even when you are offline.
LocalOnly is completely free to use. There are no subscriptions, trials, or hidden fees. We keep the service free in part by showing ads.
No. There are no accounts, sign-ups, or logins. Just open a tool and start using it right away. We do not ask for your name or email to run any tool.
LocalOnly provides a growing collection of developer utilities, including JSON formatting, validation, and conversion (such as JSON to YAML and JSON to CSV), along with encoders, hashers, generators, and other everyday tools. Browse the tools page to see the full, current list.
In most cases, yes. Because processing happens in your browser, the practical limit depends on your device's available memory rather than an upload cap. Very large inputs are handled efficiently, and heavier work runs in the background so the interface stays responsive.
We build our tools to follow the relevant standards and specifications closely, and everything is computed locally using well-tested logic. That said, we recommend reviewing important results, and if you ever spot something wrong, please report it so we can fix it.
Yes, LocalOnly displays ads through Google AdSense. Ads let us keep every tool free to use without charging you or putting features behind a paywall. We aim to keep the advertising unobtrusive so it does not get in the way of your work.
Ads are served by Google and its partners, who may use cookies, including the DoubleClick DART cookie, to serve ads based on your prior visits to this and other sites. For visitors in the EEA and UK, we present a consent choice before any advertising or non-essential cookies are set. LocalOnly itself does not set advertising or tracking cookies.
You can opt out of personalized advertising at Google Ads Settings (https://adssettings.google.com) and at https://optout.aboutads.info. You can also change or withdraw the consent choice we present. Opting out does not remove ads; it just means they may be less tailored to you.
We use Google Analytics to measure anonymous, aggregate usage such as which pages are popular, which helps us improve the site. This sets analytics cookies, but it never has access to the content you process - your data stays in your browser. You can opt out via the Google Analytics opt-out add-on or by blocking cookies; see our Cookie Policy for details.
LocalOnly is an independent, privacy-first product. It is proprietary software, but it runs entirely in your browser, so you can verify in your browser's network tab that nothing you process is ever uploaded.
The best way is to email us with your browser, operating system, steps to reproduce, and what you expected to happen. You can also reach us from the contact page if you prefer.
LocalOnly works in all modern, up-to-date browsers, including Chrome, Firefox, Safari, and Edge, on both desktop and mobile. Some advanced features rely on recent web APIs, so we recommend keeping your browser current for the best experience.
No, not unless you explicitly choose to. Your input stays in your browser while you use a tool. We only save small preferences locally, and only if you enable a feature like remembering your last input, which you can clear at any time from your browser settings.