Is it down, or is it just you?

Paste a URL. Our servers request it and report the status code and response time.

Try google.com, github.com or openai.com · See what's failing right now →

Find out what's actually wrong

A page that won't load could be a dead server, a bad DNS record, an expired certificate or your own Wi-Fi. Each tool below checks one of those, so you can stop guessing.

Live outage board Free

Open the outage board →

Measured, not voted. Many outage trackers count how many people clicked “I have this problem too.” We request each site ourselves and report what came back.

Uptime checker

Free

Online, slow or unreachable, with the HTTP code and response time.

Open →

HTTP status checker

Free

Status codes, headers and the redirect chain.

Open →

Redirect checker

Free

Every 301, 302, 307 and 308 hop, in order.

Open →

DNS lookup

Free

Asks Google and Cloudflare and shows both answers side by side.

Open →

SSL checker

Free

Certificate details, and what's wrong with them if something is.

Open →

API endpoint checker

Free

Status, latency and content type for the exact URL you give it.

Open →

Blacklist check

Free

Whether an IP is listed, in plain English with delisting steps.

Open →

All 19 diagnostic tools →

Hear about it before your customers do

Add a URL and we check it every 5 minutes. If it stops responding, you get an email.

Free Free

3 URLs, checked every 5 minutes, email alerts. Email only — no account.

Pro — $5 a month Pro

10 URLs, 1-minute checks, same email alerts. Cancel anytime by email.

Start monitoring

Small print: email only, no account to manage. Cancel Pro anytime with one email — no portal, no dark patterns.

Domains, hosting & builds

The paid side of the site. Prices are shown up front.

Domain checker

Free to search

Availability across 8 extensions using RDAP. If it's free, buy it right there through Stripe.

Managed hosting

From €29

Edge hosting with SSL, monitoring and updates. We migrate you; cancel monthly.

See hosting →

Fixed-price builds

From €950

We build your site for a price agreed before we start, so there are no hourly surprises. This site is the portfolio.

Get a quote →

Badges: Free = no payment and, for most tools, no account. Pro = a paid plan. From €X = paid service with the starting price shown.

Small tools you can use right now

Meme generator, image compressor, video to GIF, background remover, YouTube thumbnails, a percentage calculator. They run in your browser, and almost everything is free without an account.

All design tools → · Fun tools →

Ten guides, written in plain English

HTTP codes, DNS, SSL, IP addresses and VPNs, explained without the jargon. Plus a directory of 2,000+ public APIs.

Read the guides → · Public API directory → · FAQ →

Services FAQ

Is everything really free?

Almost. The checkers, guides and most tools cost nothing. Monitoring beyond 3 URLs, hosting and builds are paid, and each is labeled.

Where does the outage data come from?

From our own servers. We request each site and record the response. Nobody votes.

Can a site be down for me but fine on your board?

Yes. We check from our servers, so a problem limited to your network, region or ISP may not show up. If we say it's up and you can't load it, check your DNS and connection first.

How do you make money?

Ads, affiliate links, domain sales, hosting and builds. The full list is on the funding page.

funding page →

Not sure where to start?

Paste a URL. Most problems show up in the first check.

Check a website

Check. Diagnose. Stay online. · How we're funded: transparent breakdown →