Convert a Postman Collection to a k6 Load Test

2026-07-17 · By Avinash K

Your functional Postman tests already know the endpoints, headers, and payloads. Feed them into k6 and you have a load test in minutes.

Export the collection (v2.1) and paste it into the Postman → Code Converter with target "k6". Each request becomes a k6 http call preserving headers and body.

export const options = {
  vus: 25,
  duration: '3m',
  thresholds: {
    http_req_failed: ['rate<0.01'],
    http_req_duration: ['p(95)<600'],
  },
};

import { SharedArray } from 'k6/data';
const users = new SharedArray('users', () => JSON.parse(open('./users.json')));
export default function () {
  const u = users[Math.floor(Math.random() * users.length)];
  http.post('/login', JSON.stringify(u), { headers: { 'Content-Type': 'application/json' }});
}

stages: [
  { duration: '30s', target: 20 },
  { duration: '2m',  target: 100 },
  { duration: '30s', target: 0 },
]

k6 run --out json=result.json script.js

Upload result.json as a build artifact; overlay p95 charts in Grafana.