Case Converter

The Case Converter API allows you to convert text between different letter cases such as Lower Case, Upper Case, Upsidedown, Reverse, Random, Proper, and Toggle.

Base URL

"https://openapi-idk8.onrender.com/"

Convert Case Endpoint

GET `/case`

Description: Converts the provided text to the specified case type.

Query Parameters

• convert (required): The text to be converted.
• type (required): The type of conversion to be applied. Possible values are:
  • uppercase
  • lowercase
  • upsidedown
  • reverse
  • random
  • proper
  • toggle

Sample Request

GET `https://openapi-idk8.onrender.com/case?convert=Hello%20World&type=uppercase`

Sample Response

{
  "api_info": {
    "api_name": "Case Converter",
    "description": "Easily convert text between different letter cases: Lower Case, Upper Case, Upsidedown, Reverse, Random, Proper, and Toggle. This API is ideal for developers who need to manipulate text formats for different use cases, such as user input normalization, text processing, or data presentation.",
    "author": "OpenAPI"
  },
  "original": "Hello World",
  "converted": "HELLO WORLD",
  "type": "uppercase"
}

Case Converters Endpoint

GET `/case/converters`

Description: Retrieves a list of available case conversion types.

Sample Request

GET `https://openapi-idk8.onrender.com/case/converters`

Sample Response

{
  "converters": [
    "uppercase",
    "lowercase",
    "upsidedown",
    "reverse",
    "random",
    "proper",
    "toggle"
  ]
}

Available Conversion Types

• uppercase: Converts all letters to uppercase.
• lowercase: Converts all letters to lowercase.
• upsidedown: Flips the text upside down using special characters.
• reverse: Reverses the order of characters in the text.
• random: Randomly changes the case of each character in the text.
• proper: Converts the text to proper case (capitalizes the first letter of each word).
• toggle: Toggles the case of each character in the text (uppercase to lowercase and vice versa).

Error Handling

400 Bad Request: Returned when the required query parameters are missing.

{
  "error": "Both "convert" and "type" query parameters are required."
}

Implementation Details

The API uses a conversion function to handle the text transformations:

const upsideDownMap = {
    "a": "ɐ", "b": "q", "c": "ɔ", "d": "p", "e": "ǝ", "f": "ɟ", "g": "ƃ", "h": "ɥ", "i": "ᴉ",
    "j": "ɾ", "k": "ʞ", "l": "l", "m": "ɯ", "n": "u", "o": "o", "p": "d", "q": "b", "r": "ɹ",
    "s": "s", "t": "ʇ", "u": "n", "v": "ʌ", "w": "ʍ", "x": "x", "y": "ʎ", "z": "z",
    "A": "∀", "B": "ᗺ", "C": "Ɔ", "D": "ᗡ", "E": "Ǝ", "F": "Ⅎ", "G": "⅁", "H": "H", "I": "I",
    "J": "ſ", "K": "ʞ", "L": "⅃", "M": "W", "N": "N", "O": "O", "P": "Ԁ", "Q": "Ό", "R": "ᴚ",
    "S": "S", "T": "⊥", "U": "∩", "V": "Λ", "W": "M", "X": "X", "Y": "⅄", "Z": "Z",
    "1": "Ɩ", "2": "ᄅ", "3": "Ɛ", "4": "ㄣ", "5": "ϛ", "6": "9", "7": "ㄥ", "8": "8", "9": "6",
    "0": "0", ".": "˙", ",": "'", "?": "¿", "!": "¡", "\"": ",", "'": ",", "(": ")", ")": "(",
    "[": "]", "]": "[", "{": "}", "}": "{", "<": ">", ">": "<", "&": "⅋", "_": "‾", " ": " "
};

function convertCase(text, type) {
    switch (type) {
        case 'uppercase':
            return text.toUpperCase();
        case 'lowercase':
            return text.toLowerCase();
        case 'upsidedown':
            return text.split('').map(char => upsideDownMap[char] || char).reverse().join('');
        case 'reverse':
            return text.split('').reverse().join('');
        case 'random':
            return text.split('').map(char => Math.random() > 0.5 ? char.toUpperCase() : char.toLowerCase()).join('');
        case 'proper':
            return text.replace(/\w\S*/g, (txt) => txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase());
        case 'toggle':
            return text.split('').map(char => char === char.toUpperCase() ? char.toLowerCase() : char.toUpperCase()).join('');
        default:
            return "Invalid converter type";
    }
}

Usage Example

To use the API, make a GET request to the `/case` endpoint with the required query parameters:

fetch('https://openapi-idk8.onrender.com/case?convert=Hello%20World&type=upsidedown')
    .then(response => response.json())
    .then(data => console.log(data));