Free website change monitor: get an alert when a web page changes
Paste a page address and Shiftmoor reads its text now. Watch it and you get the lines that were added or removed whenever the page changes, by webhook (Slack, Discord, Zapier, Make, n8n) or RSS. Three pages are free, checked daily, with no card and no email.
Check a page now (free)
Paste any public page. You see the text Shiftmoor reads, its size and a fingerprint that changes when the text changes. 5 free checks a day.
Real checks: what Shiftmoor read on 8 Oct 2026
| Page | Result | Lines | Words | Fingerprint |
|---|---|---|---|---|
| status.openai.com | OpenAI Status: "We're fully operational" | 138 | 313 | bfdcbf6c |
| cisa.gov Known Exploited Vulnerabilities Catalog | read | 600 | 2,192 | 94e3a77f |
| federalregister.gov home | an access notice: the site asks automated readers to use its API | 29 | 181 | 981e1a92 |
| python.org/downloads | HTTP 403: the site blocks automated readers | – | – | – |
Source: Shiftmoor /api/check on the live pages, 8 Oct 2026 ~10:30 UTC. The last two rows are real too: some sites refuse automated readers, and the checker shows that before you rely on a watch.
How to monitor a web page for changes
Pick the exact page, not the home page: the pricing page, the careers page, the policy or tender page. A narrow page gives you alerts that mean something.
Run the free check above. If it shows the text you care about, Shiftmoor can watch it. If the site answers 403 or shows an access notice, it blocks automated readers; use the site's own alerts or API instead.
Watch the page. Shiftmoor compares the text on each check and keeps the lines added and removed, so an alert says what changed, not just that something did.
Send alerts to a webhook (Slack, Discord, Zapier, Make, n8n) or read them as RSS.
How to cut false alerts
Most noise comes from dates, counters and rotating banners. Watching text instead of screenshots already removes layout and ad changes. Pick pages whose main text changes only when something real happens, and keep one watch per page you care about.
Check frequency matters less than people think: daily is enough for pricing, policies and job listings; every 6 hours (Pro) suits tender and status pages.
Shiftmoor vs the alternatives
Published prices, each checked on the date shown; prices change, so confirm on each site.
| Product | Price | Free | Checked |
|---|---|---|---|
| Shiftmoor | $4.99/month for 25 pages; $12.99/month for 100 | 3 pages, checked daily | live |
| Visualping | Free 5 pages hourly (150 checks/month); Personal 1K $14/month (10 pages, every 15 min); 5K $35; 10K $70 | 5 pages | 2026-10-08 |
| Distill.io | Free 25 monitors (5 in cloud, 6 h); Starter $15/month (50, 10 min); Professional $35/month | 5 cloud monitors | 2026-10-08 |
| ChangeTower | Free 3 pages daily; Lite $12/month (25 pages daily); Essential $36/month (100 hourly); Business $78/month | 3 pages daily | 2026-10-08 |
Why teams pick Shiftmoor
- 3 pages free with no card or email.
- Starter $4.99/month for 25 pages daily; ChangeTower Lite is $12/month for 25 pages daily, Visualping Personal $14/month for 10 pages.
- Alerts list the lines added and removed, by webhook or RSS.
- Reads public pages only and respects robots.txt.
FAQ
Is there a free website change monitor?
Yes. Shiftmoor watches 3 pages free, checked daily. Visualping, Distill and ChangeTower also have free tiers with their own limits (see the table).
Does Shiftmoor take screenshots?
No. It compares the page text, which avoids most false alerts from layout and ads. If you need visual diffs, Visualping and Distill offer them.
How often are pages checked?
Daily on Free and Starter, about every 6 hours on Pro.
Why does a page show HTTP 403?
That site blocks automated readers. Shiftmoor does not get around blocks; use the site's own alerts or API.
Is there an API?
Yes: GET /api/check?url= returns the text summary as JSON (5 a day free; more with a key).