Free tools

Free tools for monitoring and alerts

The small jobs around watching a website: check what a URL really answers, get an alert channel working, and know what an uptime number means. Free, no account, nothing to install.

HTTP Status Checker Status code, redirect chain, timings, certificate and headers for any URL - and whether a monitor would call it up or down. Runs on our server · free, no sign-up

Telegram Chat ID Finder Paste a bot token, message the bot, get the ID of every chat it can see. Then send a test message to make sure it works. Runs in your browser · free, no sign-up

SMTP Test Connect, STARTTLS, login and a test email, step by step, with the server's own replies. Presets for Gmail, Microsoft 365, SendGrid and more. Runs on our server · free, no sign-up

SLA & Uptime Calculator What 99.9%, 99.95% or 99.99% allows per day, month and year - and whether your monitor's check interval can even see it. Runs in your browser · free, no sign-up

Where they run

The Telegram chat ID finder and the SLA calculator run entirely in your browser: nothing you type is sent to us. The HTTP status checker and the SMTP test need a real network connection, so they run on our tools server in Amsterdam - they can reach public addresses only, and what you enter is used for that one check and not stored.

Why an uptime monitor makes these

Each tool is one step of what UpWatchr does on a schedule: it runs HTTP checks like the status checker, and alerts you by email, Telegram, webhook or a Windows popup when one fails. It's a free Windows app that checks from your own PC - so it also reaches the things these web tools can't, like localhost and servers on your LAN.