Text case converter API

Convert text to UPPERCASE, lowercase, Title Case, or Sentence case.

When to call it

Headings, product names and imported records arrive in whatever case somebody typed. Normalising in code is what makes a catalogue look deliberate, and it is the only way to apply the same rule to ten thousand rows.

For a one-off, the browser version needs no token and never sends your data anywhere: it runs on your own machine.

Example

curl -X POST https://astraltext.com/api/v1/smart-case-converter \
  -H "Authorization: Bearer ast_YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"input": "état du marché. voilà tout.", "option": "title"}'

{
  "tool": "smart-case-converter",
  "result": "État Du Marché. Voilà Tout.",
  "chars": 27,
  "ms": 2
}

In your language

const res = await fetch("https://astraltext.com/api/v1/smart-case-converter", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.ASTRAL_TOKEN}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"input": "état du marché. voilà tout.", "option": "title"}),
});
if (!res.ok) throw new Error((await res.json()).detail);
const { result } = await res.json();

import os, requests

res = requests.post(
    "https://astraltext.com/api/v1/smart-case-converter",
    headers={"Authorization": f"Bearer {os.environ['ASTRAL_TOKEN']}"},
    json={"input": "état du marché. voilà tout.", "option": "title"},
    timeout=30,
)
res.raise_for_status()
result = res.json()["result"]

Parameters

Errors

Errors are RFC 7807 problem documents with a stable type you can branch on.

Questions

Which cases can I ask for?

Send "option" as sentence (the default), title, uppercase or lowercase. Anything else is refused with a bad-option error.

Are accented letters handled?

Yes. The letter classes are Unicode-aware, so a word starting with an accented character is capitalised correctly rather than being left alone or mangled.

How is sentence case decided?

The text is lowercased, then the first letter of the string and the first letter after a full stop, question mark or exclamation mark is capitalised.

Other endpoints

• AI text cleaner API
• Remove em dashes API
• Remove invisible characters API
• Remove emoji API
• Remove line breaks API
• Strip Markdown API