You searched for how to organize a wedding, but you still don't know where to start or in what order to book your vendors? This prompt has ChatGPT build a small personal wedding-planning app. It is delivered as a single file, in a single reply. You enter your date, guest count, budget, party style and ceremony type. The app gives you a month-by-month calendar, a budget breakdown and a checklist of tasks to tick off.

The prompt is written in French and works in any language model that understands French.

Who is it for?

• Engaged couples who don't know where to begin, or in what order to book their vendors.

• Couples planning a countryside, classic, low-budget or small civil wedding.

• Relatives who help with the planning and want a simple tool, with no account to create.

What you get

• A home screen with a countdown, tasks completed, budget committed and three tips tailored to your party style.

• A calendar calculated from your date, with a "To catch up" section if you are starting late.

• A starting budget breakdown that you can edit, with tracking of amounts committed and paid.

• A full task list, from booking the venue to sending thank-you notes. You can hide the tasks that don't apply to you with one click and add your own.

• A backup saved to a file, and legal page templates to complete in your own name.

How to use it

• Copy the prompt and fill in the details in square brackets. If you don't know yet, write "to be decided": a provisional value will be suggested, flagged, and can then be changed in the app.

• Paste the prompt into ChatGPT, preferably with a recent model.

• ChatGPT answers in this order: a short check listing the assumptions it made, the complete code of the app, a few lines of setup and troubleshooting, and at most three questions to refine it.

• On a computer, paste the code into a text file saved as organiser-mon-mariage.html, then open it with a double-click.

• Is the page blank? Follow the instruction provided with the file to get a corrected version.

Example result

Take a countryside wedding with 80 guests in June and a 12,000 € budget. The calendar sorts the tasks in the recommended order, from choosing the venue to the thank-you notes. The home screen reminds you to visit the venue in the same season and to keep a backup plan in case of rain. The Budget tab suggests an allowance for each spending category.

Limits

The timelines and the budget breakdown are indicative guidelines, not averages: always check with your vendors. The app gives no official list of documents: it refers you to your town hall. The legal pages are templates, not legal advice. Your data stays in the browser of a single device and can be erased: export your backup regularly. On a phone, opening a local file varies by device. The result may vary from one generation to the next. If the reply stops before the end of the code, ask ChatGPT to continue.