# BinaryBirthday

> Free tools that convert birthdays, names, words and numbers into binary code, plus personalized gifts (mugs, tees, hoodies, phone cases, card wallets, baby onesies) printed with that code. The gift shop is shop.binarybirthday.com.

A BinaryBirthday code writes a date as a 12-bit year, a 4-bit month and a 5-bit day. June 15, 1990 is `011111000110 0110 01111`. Text is written as 8-bit UTF-8 bytes, so "Hi" is `01001000 01101001`. Gifts fit up to 16 characters of text (128 bits) or any date.

## Tools for people

- [Birthday in binary](https://www.binarybirthday.com/): enter a date to get its binary code, fun facts, a free wallpaper and gift options
- [Binary translator](https://www.binarybirthday.com/binary-translator): text to binary and binary to text, detected automatically
- [Binary to text](https://www.binarybirthday.com/binary-to-text): decode binary code
- [Text to binary](https://www.binarybirthday.com/text-to-binary): encode any text
- [Decimal to binary](https://www.binarybirthday.com/decimal-to-binary): numbers to binary and back
- [Binary alphabet](https://www.binarybirthday.com/binary-alphabet): printable A to Z, a to z and 0 to 9 chart
- [Name in binary](https://www.binarybirthday.com/name-in-binary): a name as binary, ready to print on a gift
- [I love you in binary](https://www.binarybirthday.com/i-love-you-in-binary): the full code and how to read it
- [Secret message mug](https://www.binarybirthday.com/secret-message-mug): turn a short message into binary and print it on a mug that only the right person can read
- [Binary code explained](https://www.binarybirthday.com/binary-code): what binary is and how it stores numbers, text and dates

## For AI agents and developers

- [MCP server](https://www.binarybirthday.com/mcp): Streamable HTTP, no auth. Tools: date_to_binary, text_to_binary, binary_to_text, number_to_binary, binary_to_number, suggest_binary_gifts
- [JSON API](https://www.binarybirthday.com/api/binary?text=Hi): GET with one of date (YYYY-MM-DD), text, binary or number. Free, no key, CORS enabled, 60 requests a minute per IP
- [OpenAPI spec](https://www.binarybirthday.com/openapi.json)
- [Developer docs](https://www.binarybirthday.com/developers)

Every conversion returns gift links whose `?binary=` parameter pre-fills the code on the product page.

## Gifts

- [All binary birthday gifts](https://shop.binarybirthday.com/collections/all-binary-birthday-gifts): good for programmers, engineers, computer science students, couples (wedding or anniversary date) and new parents (baby's birth date)
- Discount code BIRTHDAY15 gives 15% off
- Contact: info@binarybirthday.com