Free checkers and calculators for earning online

Domain name checker

See whether a domain is free to register across the common endings, checked against the official registry records.

With a free account: Keep a watchlist and hear when a name you want becomes available.

Domain history checker

Find when a website was first archived, how often it has been captured and how it looked in earlier years, using the Internet Archive's records.

With a free account: Export the full year by year timeline.

Domain age checker

Find out when a domain was first registered, when it expires and which registrar holds it.

With a free account: Save your own domains and get a reminder before renewals fall due.

What is my IP address

Show the public IP address your connection is using, with the approximate location and network it points to.

Redirect checker

Follow a link through every redirect to its final page, with the status code at each step.

With a free account: Check up to 50 links at once.

SSL certificate checker

Check that a site's security certificate is valid, see who issued it and find out when it runs out.

With a free account: Get an email reminder before a certificate expires.

Meta tag and social preview checker

See the title, description and share image a page gives to search engines and social networks, and spot anything missing.

Affiliate link checker

Paste an affiliate link to confirm it reaches the right page and that your tracking tag survives every redirect on the way.

With a free account: Recheck your saved links every week and flag any that break.

QR code generator

Turn any link into a QR code for flyers, packaging or a market stall, ready to download as an image.

With a free account: Keep a library of your codes in one place.

Affiliate commission calculator

Work out what a programme pays per sale and per month from the price, the commission rate and the sales you expect.

EPC calculator

Calculate earnings per click, so you can compare programmes that pay in different ways on equal terms.

Affiliate disclosure generator

Write a clear disclosure for your website, videos or social posts, ready to adapt to the rules where you are.

Ad revenue calculator

Estimate what display adverts could pay a website from monthly visitors, pages per visit and a typical RPM.

With a free account: Save scenarios and compare them side by side.

CPM and RPM calculator

Convert between cost per thousand impressions, revenue per thousand page views and total earnings.

YouTube earnings calculator

Get a realistic range for what a channel could earn from its views, with sponsorship and affiliate income shown separately.

Profit margin calculator

Find your margin and markup from cost and price, or the price you need to reach a target margin.

Break-even calculator

See how many sales it takes to cover your costs, and how that number moves when you change the price.

Freelance rate calculator

Work back from the income you want, your costs and the hours you can bill to a sensible day rate and hourly rate.

Etsy fee calculator

See what listing, transaction and payment fees take from each Etsy sale, and what you keep.

Amazon Associates earnings calculator

Estimate commission from the product category, the order value and the number of orders you expect.

Invoice generator

Create a simple, professional invoice in your browser and download it as a PDF.

With a free account: Save client details and number invoices automatically.

Business name generator

Get name ideas for a new business or side project and check straight away whether the matching domain is free.

With a free account: Shortlist your favourites and come back to them.

Word counter

Count words and characters, and estimate reading and speaking time for articles, scripts and captions.

Search result preview

Preview how your page title and description will look in Google on desktop and mobile, and where they will be cut short.

Social image resizer

Crop and resize one image to the right size for each social network, without the file leaving your browser.

Dog walking price calculator

Set your prices from walk length, how many dogs you take out together and what it costs you to run.

Pet sitting price calculator

Price home visits and overnight stays from your time, your travel and the number of pets in your care.

Rental yield calculator

Work out gross and net yield on a rental property from the price, the rent and the running costs.

Yoga class price calculator

Price drop-in classes, class blocks and private sessions from room hire, class size and the hours you put in.

Candle making cost calculator

Cost each candle from wax, fragrance, wick and container, then set a retail price and a wholesale price.