Free shorten API | INBIO Docs

The simplest way to create a short link programmatically. No account, no API key, no configuration — one request in, a short link out. Perfect for scripts, bots, and side projects.

curl -X POST https://in.bio/api/shorten \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com/very/long/link"}'

{
  "short_url": "https://in.bio/a8K2p",
  "slug": "a8K2p",
  "qr_url": "https://in.bio/qr/a8K2p.png",
  "preview_url": "https://in.bio/preview/a8K2p",
  "expires": "Anonymous links are deleted after 30 days. Claim it with a free account to keep it and see click analytics.",
  "claim_url": "https://in.bio/register?claim=…",
  "docs": "https://docs.in.bio/api/free-shorten"
}

Request

POST https://in.bio/api/shorten — JSON or form body, one field:

Field	Type	Notes
`url`	string	Required. Max 2048 chars. `https://` is assumed if the scheme is missing

Responses

Status	Body	Meaning
`201`	`{short_url, slug, qr_url, preview_url, claim_url, expires, docs}`	Link created
`422`	`{"error": "reason"}`	Invalid or unsafe URL (blocked destination, private address, re-shortened shortener…)
`429`	—	Rate limit hit; check `Retry-After`

Limits & rules

5 requests per minute per IP, and 100 per day.
Links are anonymous: they redirect immediately but can’t be edited or tracked, and they’re deleted after 30 days unless claimed via claim_url.
Every destination goes through the same phishing/malware safety scan as the rest of INBIO — unsafe URLs are rejected or disabled.
The qr_url serves a ready-to-use PNG QR code for the link.

Examples

JavaScriptjs

const res = await fetch("https://in.bio/api/shorten", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({ url: "https://example.com/long" }),
});
const { short_url } = await res.json();

Pythonpython

import requests

r = requests.post("https://in.bio/api/shorten", json={"url": "https://example.com/long"})
short_url = r.json()["short_url"]