For years, the gap between "I wish there was a little tool for this" and having one meant a spreadsheet, a developer or an evening of swearing at a template. Claude Artifacts closes most of that gap. You describe a small tool in plain English, and a working version appears beside the chat. Here is how I build one, start to finish, in about twenty minutes.

Level: beginner. You need a Claude account and a computer; a phone works for trying the result. No coding, and nothing to install. If you have never used an AI chat before, my guide to writing AI prompts that actually work is a good ten minutes first.

What an Artifact is, and what it is good for

An Artifact is something Claude makes that sits in its own panel next to the conversation instead of scrolling away inside it. That might be a document, a diagram or a web page. The one that surprised me most is a small interactive tool: a calculator, a checklist, a planner or a quiz that you can click and type into straight away.

These are not apps to sell. They are the small, personal ones: a holiday cost splitter, a meal rotation, a "how much can I really spend this month" calculator. Anything where a spreadsheet would feel like overkill but a pen and paper keeps going wrong. If you want something that remembers things across many chats, that is a different job, and my guide to Claude Projects covers it.

The five steps

1. Pick one tiny job, and write it as a sentence

The tools that work are the small ones. Finish this sentence before you open Claude:

This tool takes [the numbers or choices I type in] and shows me [the answer I need], so I can [what I will do with it].

My example, and the one I will use all the way through: takes what each person paid on a group trip and shows me who owes whom, so everyone can settle up in one go. If your sentence needs the word "and" more than once, you have two tools. Build the first one this week.

2. Write a four-part brief

The same habits that make a good prompt make a good tool. Give Claude what it is, who uses it, the exact inputs, and how it should look:

Build me a simple, mobile-friendly tool called Trip Splitter. I will add each person's name and the total they paid, in pounds. When I press a button, show the total, the fair share per person, and the shortest list of payments so everyone ends up even, for example "Sam pays Priya £24.50". Use large buttons, plain colours and clear labels. If a number is missing or not a number, tell me instead of guessing.

The last line matters most. A rule that says "tell me instead of guessing" does more for reliability than any amount of polish.

3. Ask for an Artifact and let it build

Open a new chat at claude.ai and paste your brief. If the tool does not open in a panel beside the chat, add "Please make this as an Artifact". After a short wait you should see a working version on the right. Click around. Add three names, type some amounts, press the button.

Do not judge it on looks yet. The first version is a rough draft, not a verdict, and the point of this step is only to find out whether the idea works at all.

4. Test it with numbers you can check by hand

This is the step people skip, and it is the one that decides whether you can trust the tool. Use a case where you already know the answer. Mine: Sam paid £90, Priya paid £30 and Alex paid nothing. The total is £120, each share is £40, so Alex owes £40 and Sam is owed £50 while Priya owes £10 to Sam. If the tool says anything else, it is wrong, however good it looks.

Then try the awkward ones: an empty box, a negative number, one person only, a name typed twice. A tool that handles those politely is one you can hand to someone else.

5. Change one thing at a time, then keep it

Ask for changes in short, separate messages: "Add a button to clear everything", "Show amounts to two decimal places", "Make the result easier to read on a phone". One change per message means you can see which one broke something, and you can ask Claude to put it back. Three or four rounds is normal.

When you are happy, look for the options to publish, share or copy the result in your own account. Save the original brief in a note of your own as well. If the Artifact ever disappears or changes, the brief lets you rebuild it in five minutes.

Four more small tools worth building

  • A monthly "safe to spend" calculator. Income, fixed bills and savings in; a weekly spending figure out. (If you want the bigger version, see my AI budgeting system.)
  • A meal rotation picker. A list of ten dinners, a button, and a rule that nothing repeats within a week.
  • A packing checklist. Tick boxes grouped by trip type, with a clear-all button.
  • A quick price-per-unit comparer. Two prices and two sizes in; the cheaper one out.

When it goes wrong

  • The maths is quietly wrong. This is the real risk with AI-built tools: they look right. Always check one known answer by hand, and re-check after each change.
  • Claude rewrites things you did not ask about. Say "change only the button; leave everything else exactly as it is".
  • It works, then stops after an edit. Ask Claude to go back to the previous version and try a smaller change.
  • It does not remember your data. Small tools like this often forget what you typed when you close them. Write down results you need.
  • You want something bigger. A tool that logs people in or stores data for others is a real software job. A coding assistant is a better route there; my first week vibe coding with Cursor is an honest account of how that goes.

Where to go next

Build the Trip Splitter, or your own version, this week and use it for real once. That teaches you more than reading about it. If you are still choosing which assistant to use, my comparison ChatGPT vs Claude explains where each one is stronger, and ChatGPT users can start with the Custom GPT playbook instead. For a gentler start with AI in general, Your First 30 Days With AI is my beginner course, and its first two modules are free. More ideas are in the AI tools hub. And if you would rather point the same careful-brief habit at something with a deadline attached, tailoring your CV to a job ad with Claude is five steps and the same discipline of checking what it hands back.

Want more plain-English AI guides? I send one practical guide a week to my newsletter. Sign up here and I'll send the next one straight to your inbox.

Questions people actually ask

What are Claude Artifacts?

Artifacts are a panel beside your chat where Claude puts something you can use or keep, such as a document, a web page or a small working tool. You describe what you want and it appears next to the conversation, ready to try.

Do I need to know how to code to use Claude Artifacts?

No. You describe the tool in plain English and Claude writes the code. You never have to read it. You do need to test the result, because the tool is only as good as the check you give it.

Are Claude Artifacts free?

Artifacts have been available to free Claude accounts, but plans, limits and menus change, so check what your own account offers inside the Claude app.

Can I share the app I build?

Artifacts can usually be shared or published by link, and you can also copy the code out. Sharing options differ between plans and change over time, so look at the share button in your own account before you promise anyone a link.

Is it safe to put real data into an app Claude builds?

Treat it as a calculator, not a vault. Use it for numbers and drafts, not passwords, account details or anything private. Keep that data out of the chat as well as the app.