Free Website Change Monitor
Track any web page and see exactly what changed — added text in green, removed text in red. Watch competitor pricing, policies, job boards and changelogs. No signup required.
What you can watch
Point it at any page where a quiet edit can cost you.
Competitor pricing
Catch the moment a rival changes a price, adds a plan, or quietly drops a feature from a tier.
Competitive intelligence
Track competitor product, messaging and homepage changes so you spot a strategic move early.
Legal & regulatory
Watch terms of service and privacy policies, and know when the wording changes.
Changelogs & releases
Follow product updates from the tools you depend on, without checking a dozen changelogs by hand.
Job market signals
Track hiring pages at target companies — staffing up tells you where they’re investing next.
News & announcements
Keep an eye on newsrooms and press pages so you never learn about a launch late.
How it works
Add a URL
Paste any page you want to keep an eye on. No account, no extension, no code.
Pick how often to check
With Firehose you choose a check frequency, as often as every few minutes. Try it free here to see a page’s past year of changes right away.
See what changed
Get a text diff of every change: added text in green, removed text in red, so you can read what moved in seconds.
What you get
Before-and-after diff
Added text in green, removed text in red, so you can read exactly what moved.
A change timeline
Every meaningful change from the last year, dated, so you can see when and how often the page moves.
Severity at a glance
Each change is tagged moderate, major or overhaul, so you know which ones matter.
Text-level tracking
You see the words that changed, not a vague alert.
No setup friction
No extension, no script, no account. Paste a URL and go.
Watch the whole web with Firehose
This free tool shows past changes for one page. Firehose watches the pages you care about going forward — hundreds at once, checked as fast as every few minutes — and monitors the entire web for anything that matters.
Watch more pages
Monitor hundreds or thousands of URLs at once, with faster check frequencies.
Real-time alerts
Get notified the instant a page changes — email, Slack, Teams, webhook or API.
Monitor the whole web
Write a query and Firehose surfaces every new page across the web that matches.
Automate with AI
Stream matches over SSE or let your AI assistant set up taps, rules and alerts from a prompt.
Questions & answers
What is a website change monitor?
A tool that shows you when and how a web page’s content has changed. You add a URL and get a before-and-after diff of the meaningful changes, instead of manually comparing versions yourself.Where does the change data come from?
From Ahrefs’ crawl history. We look up the recorded changes for the page over the last year and show the text that was added or removed at each one.Do I need to install anything?
No. There’s no browser extension, no script and no account required. Paste a URL and you’ll see the changes.What kinds of pages should I check?
Competitor pricing pages, terms of service and privacy policies, careers pages, changelogs and release notes, landing pages and docs — any page where a quiet change matters to you.How is this different from an uptime monitor?
Uptime monitors tell you whether a page is online. A change monitor tells you what changed on it — the exact text added or removed.How is this different from Firehose?
This free tool shows past changes for a single page. Firehose watches many pages going forward at faster intervals, sends real-time alerts, and can monitor the entire web with a query.