# Birthdaycard

> Birthdaycard is a free online birthday card maker. It generates beautiful animated, personalized birthday cards in seconds and gives every card a unique shareable URL.

## Product

Birthdaycard.site lets anyone create a birthday card online without an account or design skills. The user enters the birthday person's name, age, relationship (friend, brother, sister, partner, parent, colleague) and a custom message, chooses a theme (Classic, Pastel, Blue, Pink, Party), and instantly receives an animated card.

When a card link is opened, the receiver experiences a surprise reveal: floating balloons, a confetti explosion, a cake with candles to blow out, and then the personalized message. Cards can be shared via link, WhatsApp, native share, or downloaded as an image.

## URLs

- https://birthdaycard.site/ : Create a birthday card (the hero section is the product)
- https://birthdaycard.site/card/{slug} : Public view of a generated birthday card, e.g. /card/john-25
- https://birthdaycard.site/premium : Premium upgrade page ($4.99 one time)
- https://birthdaycard.site/llms.txt : This file

## Features

- Free unlimited birthday cards with watermark
- Animated surprise reveal with balloons, confetti and candle blowing
- Unique public URL per card for viral sharing
- WhatsApp sharing, native share, copy link, image download
- Five illustration themes with cute 3D cartoon style assets
- Premium ($4.99 one time): no watermark, premium animations, more themes, HD download, custom background music

## API information

- GET /checkout : Creates a Polar checkout session for the Premium product (requires POLAR_ACCESS_TOKEN)
- POST /api/webhook/polar : Polar webhook endpoint verifying signatures with POLAR_WEBHOOK_SECRET; handles payment success and subscription status

## SEO information

Primary keyword: birthday card. Secondary keywords: birthday card maker, create birthday card online, free birthday cards, personalized birthday card, happy birthday card, birthday wishes card, online birthday card generator, custom birthday card. The homepage contains an SEO content section and FAQ schema covering birthday wishes ideas, messages for friends and family, and card design tips.

## Brand

Name: Birthdaycard. Tone: warm, playful, emotional, simple. Design: warm cream paper UI (eggshell #fdfcfc, taupe #f5f3f1, stone #ebe8e4, graphite #44403b, smoke #777169) with colorful rainbow birthday illustrations.

## Usage examples

1. Create a card for a friend: enter name "Maya", age 25, relationship friend, a message, choose the Pastel theme, press Create Birthday Card, share the /card/maya-25 link on WhatsApp.
2. A long distance partner sends a romantic card with the Pink theme and a heartfelt message; the receiver blows out virtual candles before reading it.

## Developer information

Built with Next.js App Router, TypeScript, Tailwind CSS v4. Payments by Polar. Analytics via Google Analytics (NEXT_PUBLIC_GA_ID). Data layer designed for Supabase (users, cards, orders tables).