Free tools

# Free tools for developers

We build website monitoring for a living, so we end up making little tools along the way. Here are a few we think you'll find handy. They're free, and none of them need a signup.

[ 🌐## DNS lookup

See every DNS record for any domain: A, AAAA, MX, TXT, and more, with a plain-English explanation of what each one does.

](https://ohdear.app/tools/dns) [ 🪞## Request Mirror

Send any HTTP request and see exactly what arrived. Good for debugging webhooks, API clients, redirects, and status codes.

](https://request-mirror.ohdear.app) [ 📡## Website down checker

Check whether a website is down for everyone or just you, live from six locations around the world.

](https://ohdear.app/docs/faq/how-to-check-if-a-website-is-down)