Case Converter

Q: How do I get only one case?

Add `to`, for example `to=camel`. The response is then `{"result": "..."}`.

Convert text to lower, UPPER, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE or dot.case in one call.

Result

Press “Run” to see the result.

Send a text (query string, JSON or form field, or raw text body) and get it in ten cases at once: lower, upper, title, sentence, camel, pascal, snake, kebab, constant and dot. Add to with one of these names to receive only that variant in result.

For the programming cases (camel, pascal, snake, kebab, constant, dot) the text is split into words on any non-letter, non-digit character and on lowercase-to-uppercase boundaries, so userId, user_id and user id all give the same parts. Title and sentence case work on the lowercased text and keep spacing and punctuation. Unicode letters, including Vietnamese, are supported.

The input text is limited to 100,000 characters. An unknown to value returns a 400 error listing the valid names.

Use this in your code

curl -X POST "https://apibox.io.vn/v1/case-convert" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"user profile settings"}'

const res = await fetch('https://apibox.io.vn/v1/case-convert', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "text": "user profile settings"
  }),
});
const data = await res.json();
console.log(data);

import requests

res = requests.post(
    "https://apibox.io.vn/v1/case-convert",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"text": "user profile settings"},
    timeout=30,
)
print(res.json())

<?php
$ch = curl_init('https://apibox.io.vn/v1/case-convert');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_HTTPHEADER => ['Authorization: Bearer YOUR_API_KEY', 'Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"text":"user profile settings"}',
]);
$response = curl_exec($ch);
print_r(json_decode($response, true));

API documentation → Get a free API key

FAQ

How do I get only one case?

Add to, for example to=camel. The response is then {"result": "..."}.

Does it split existing camelCase words?

Yes. A lowercase letter or digit followed by an uppercase letter starts a new word, so exampleText becomes example_text in snake case.

Which case names are supported?

lower, upper, title, sentence, camel, pascal, snake, kebab, constant and dot.