# UseQR vs the qrcode npm package

> They are different tools. Inside a Node or JavaScript codebase you control, the qrcode npm package is often the right choice — no network dependency, MIT-licensed, battle-tested. UseQR earns its place when you want zero dependencies, typed payloads like UPI or EPC, styled output, decode-verification, or codes made by non-developers. Many teams sensibly use both.

Source: https://useqr.app/vs/useqr-vs-qrcode-npm · Last reviewed 2026-08-21 · UseQR is free forever, MIT licensed, no signup.

---

## Library vs product — the honest framing

The `qrcode` package on npm is a library: MIT-licensed, widely used, downloaded millions
of times a week, and it does one thing well — turn a string into a QR matrix and render
it as PNG, SVG or a terminal string. UseQR is a product: a generator, an API, payload
builders and a verification loop. Comparing them as rivals is a category error, so this
page is a decision matrix instead.

If you are writing JavaScript and the requirement is "render this string as a QR code",
**install the library**. That is what it is for, and we would be wasting your time
suggesting otherwise.

```js
import QRCode from "qrcode";
await QRCode.toFile("out.png", "https://example.com", { errorCorrectionLevel: "M" });
```

No network call, no third party at runtime, versions pinned in your lockfile. Our
[JavaScript guide](/docs/developers/generate-a-qr-code-in-javascript) uses it, and the
[Node guide](/docs/developers/generate-a-qr-code-in-node) covers the server-side variants.

## Where the library stops

The library encodes strings. Everything before and after the string is yours to get
right, and that is where the failure modes live:

- **Payload construction.** `WIFI:T:WPA;S:Café Guest;P:p@ss;;` has escaping rules.
  UPI has a VPA format and NPCI field semantics; EPC has an IBAN checksum; vCard has
  version quirks that decide whether iPhones import the contact correctly. The most
  common QR bug in production is a well-rendered code containing a malformed payload.
- **Verification.** `qrcode` renders; it does not read back. A logo overlay, low
  contrast or aggressive styling can produce an image that will not scan, and
  [nothing in the render path will tell you](/docs/developers/why-verify-that-your-qr-code-decodes).
- **Styling.** Round modules, custom eyes, embedded logos — not the library's job
  (that gap is what [qr-code-styling addresses](/vs/useqr-vs-qr-code-styling)).
- **Non-developers.** The marketing team cannot `npm install`.

## What UseQR adds, concretely

- **Typed payload endpoints** built from the real specs: `/api/v1/wifi?ssid=…`,
  `/api/v1/upi?pa=…`, `/api/v1/epc?iban=…` — validation errors arrive at generation time
  with a `fix` field, not at scan time.
- **A verify loop**: every code is rendered and decoded back before delivery, and
  `GET /api/v1/verify` does the same for any payload — useful
  [in CI](/docs/developers/free-qr-code-api-no-key) even when the rendering itself is done
  by the npm library.
- **Zero dependencies** for scripts, CI jobs, spreadsheets and
  [1,000-item batches](/bulk) — one HTTP call, no toolchain.
- **A UI** for everyone on the team who is not you.

And because the [core is MIT open source](https://github.com/rajkaria/useqr) too, choosing
UseQR is not choosing a closed product over an open library.

## The decision matrix

| Situation | Use |
|---|---|
| Rendering QR codes inside a JS/Node app you ship | **qrcode npm** |
| Offline or air-gapped generation in code | **qrcode npm** |
| WiFi/UPI/EPC/vCard payloads that must be spec-correct | UseQR endpoints, or its payload code as reference |
| Styled codes with a logo that must still scan | UseQR (styled + verified) |
| One-off codes, or codes made by non-developers | UseQR |
| Shell scripts, CI, no-dependency automation | UseQR API |
| Proving a generated image actually decodes | UseQR verify endpoint — even for library-rendered codes |

The genuinely common pattern is both: the library renders in-app, and the API's decode
and verify endpoints act as the test harness.

## FAQ

### Should I use the qrcode npm package or a QR API?
Inside a codebase you control, prefer the library — no runtime network dependency and full control. Use an API when you want zero dependencies, typed payload validation, styling with verification, or a UI for non-developers.

### Is the qrcode npm package free for commercial use?
Yes. It is MIT-licensed, like most of the mainstream QR libraries, and is one of the most widely used packages in the ecosystem.

### How do I know my library-generated QR code actually scans?
Rendering succeeding proves nothing about scannability. Decode the output with an independent reader — a verify endpoint or a decoder in CI — especially after adding logos, colours or non-standard styling.

### Can I build WiFi or payment payloads with the qrcode package?
The package encodes whatever string you give it, so yes — but the string format is your responsibility. WiFi escaping, UPI fields and IBAN checksums are where hand-built payloads usually go wrong; use a spec-validated builder for those.

## Try it

- https://useqr.app/url
- https://useqr.app/validate
- https://useqr.app/bulk