Swift Print icon Swift Print
Free open-source Windows print bridge

Swift Print

Reliable local printing from browser-based applications.

Free Open Source Lightweight Windows Only Local API
Download Installer
Download Portable exe
View on GitHub

From web app to printer in four steps.

Swift Print keeps the integration small: discover printers, authorize the request, send raw data, and let Windows handle the device path.

1

Run the tray app

Swift Print starts quietly in the Windows system tray and listens on localhost.

2

Find printers

Use the local API to list installed printers available to Windows.

3

Send print data

Post base64 encoded receipt, label, ESC/POS, or other raw print commands.

4

Print locally

Swift Print routes through native Windows printer integration.

Install, run, and print.

A short local setup guide so you can understand the bridge without leaving this page.

Install

  • Download the Windows installer from the button above.
  • Run the installer and launch Swift Print.
  • The app runs quietly in the Windows system tray.

Configure

  • Swift Print listens locally on 127.0.0.1.
  • Default port is 1818.
  • Change the default token change-me before real use.

Use the API

  • Check health with GET /.
  • List printers with GET /printers.
  • Print raw base64 data with POST /print.
Send the secret token with print requests using the X-API-KEY header. For browser testing, open examples/test.html, enter the port and token, then load printers or send a small test print.

Small HTTP API.

List printers, send raw print bytes, and protect printer actions with the X-API-KEY header.

Health

GET / verifies the bridge is running.

Printers

GET /printers returns installed printers.

Print

POST /print sends base64 encoded raw data.

Swift Print running 127.0.0.1:1818 
POST /print HTTP/1.1
Host: 127.0.0.1:1818
Content-Type: application/json
X-API-KEY: your-secret-token

{
  "printer": "Receipt Printer",
  "data": "BASE64_ENCODED_RAW_BYTES"
}

200 OK
{
  "success": true,
  "error": ""
}