krtk.ee (/ˈkrut.kʲɛ/) or KROOT-kyeh was created because I didn't see any easy-to-use or easy-to-deploy URL shorteners, so I made my own.

Try it out: https://krtk.ee/

• Shorten URLs – Quickly generate short links.
• CAPTCHA Protection – Prevents automated abuse.
• SQLite Database – Lightweight and easy to deploy.
• Minimalist Web UI – Simple and functional interface.

• Go (latest version recommended)
• SQLite3

git clone https://github.com/ajarmoszuk/krtk.git
cd krtk

Build and run:

go get
go build -o krtk
./krtk

The server runs on port :2137 by default. Open http://localhost:2137/ in your browser.

POST /shorten

Request Body:

{
  "original": "https://example.com",
  "captcha_id": "captcha_id",
  "captcha": "captcha_text"
}

Response:

{
  "short": "/go/abc12"
}

GET /go/{short}

GET /captcha

Response:

{
  "captcha_id": "abc123"
}

GET /captcha/{id}

Response: CAPTCHA image

This project is open-source under the WTFPL License.