About lardr.dev

lardr.dev has 71 free developer tools: encoders, converters, hashes, formatters, and explainers for algorithms and AI models. There is no sign-up.

Your input stays on your device

Every tool processes its input in your browser. Nothing you type or paste is sent in a request. To check, open your browser's network inspector and use a tool. A tool you have opened once also works offline.

Small pages

Pages are static HTML. A tool's JavaScript loads only on its own page. Large libraries, such as the SQL formatter or the tokenizer, load only when you use them.

How it is built

Astro builds the pages, and the tools are written in TypeScript. Each tool's logic is a pure function with unit tests, and the tests check every example shown on the tool's page.

There is no analytics script and no tracking cookie. The site counts how often each tool is used, and nothing else. The privacy policyhas the details. The site is hosted on Cloudflare Pages.

Ads

There are no ads. If ads come, they will sit below the tool and will not move the page as it loads. The privacy policy will change before the first ad is served. Tool input will still stay in your browser.

Contact

To ask for a tool or report a wrong answer, email hello@lardr.dev.