Free Monitoring & Network Tools.
Save time and run common monitoring and network administration tasks with our free tools.
Subnet Calculator IPv4
Our free subnet calculator returns a variety of information regarding Internet Protocol version 4 (IPv4) subnets including possible network addresses, usable host ranges, subnet mask, and IP class, among others.
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Subnet Calculator IPv6
Our free subnet calculator returns a variety of information regarding Internet Protocol version 6 (IPv6) subnets including possible network addresses, usable host ranges, subnet mask, and IP class, among others.
Use toolDNS Lookup.
Look up DNS records for any domain in seconds. Verify A/AAAA/CNAME/TXT/NS (and more), confirm TTL values, and spot misconfigurations before they turn into downtime.
Use toolUptime & Downtime Calculator.
Our Uptime & Downtime Calculator helps you quickly determine how much downtime your site experiences based on your uptime percentage—or vice versa.
Use toolCrontabRobot.
Create custom cron expressions for your scheduled tasks in seconds — no guesswork or manual syntax errors.
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Website change detection.
Track visual changes on any webpage. Just enter the URL, select the area to monitor, and get alerted the moment it changes.
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Back in Stock Alert.
Track product availability on your favorite online stores and get notified the moment it's back in stock.
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Price Tracking.
Monitor any product page and get email alerts when the price goes down, automatically.
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Compliance Monitoring.
Track changes to government, legal, and compliance-related websites and get notified when policies, terms, or documentation are updated.
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Job Alert Job Page Monitoring.
Track company careers pages, job boards, or remote job listings and get notified when new jobs appear or listings change.
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Media Monitoring.
Monitor key web pages for updates to headlines, articles, or listings, and get notified the moment something changes.
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Appointment Availability Monitoring.
Track appointment pages and get notified the moment new time slots open up, from passport offices to medical clinics.
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Ticket Hotel Deal Alert.
Track ticket and hotel booking pages and get notified the moment prices drop or availability changes.
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Competitive Monitoring.
Get notified by email the moment something changes with our free competitor monitoring solution.
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Start monitoring for free.
Don’t be the last one to notice that your website is down. Try UptimeRobot - the world's leading website monitoring service!
All you really care about
monitored in one place.
Trusted by developers & businesses worldwide.
UptimeRobot - Useful in keeping me ahead of game
It is very useful for me to in near real-time to manage the status of my websites. I have to manage about two dozen properties—not all that I own—so having a light footprint tool for this is great. It is great to know of (and fix) issues with my sites before my boss knows there is an issue.
Few steps to setup, great results in monitoring
We have been using our website monitoring and API for the past 4 years and have loved how easy it is to set up and being notified as soon as something is no longer correct has allowed us to fix bugs as quickly as possible. The query time set to 5 min is one of the best ways to integrate avoiding too much load on the server, so far due to the ease of use we have not required customer support yet.
Reliable and essential monitoring tool
We've had a great experience with UptimeRobot. It's incredibly useful to get timely alerts when our system is down, helping us address issues quickly. We're glad a tool like this exists to provide peace of mind and ensure our uptime. Highly recommend!
Don’t be the last one to notice that your website is down.
Try UpTimeRobot - the world’s leading website monitoring service!
Start monitoring for freeFrequently Asked Questions.
Are these tools really free to use?
Yes, these tools are completely free to use. You can access them directly on our website without any need for registration, email address, or additional restrictions.
Do I need to sign up to use the free tools?
No sign-up is required to use these free tools. Simply visit the website and start using them instantly.
What other free tools does UptimeRobot offer?
UptimeRobot offers a generous forever free plan, allowing you to monitor up to 50 URLs, IPs, Ports, and Keywords with 5-minute intervals. Signing up takes just 30 seconds with your email address.
Incident management
Status pages
MCP
Integrations