BarcodeAPI.org API

Base URL

https://barcodeapi.org/api

Authentication

No API key or account. The service is open source and self-hostable via Docker for high-volume or offline use.

Rate limit

Per-IP throttling with a token bucket; limits are reported in `X-RateLimit-*` response headers.

Pricing

Free. Open source, with a Docker image for self-hosting.

CORS

Enabled — callable directly from browser JavaScript

Official docs

Read the docs

Every request below was executed against the live API on 21 Aug 2026, and the response shown is the real body it returned — not an illustration.

curl 'https://barcodeapi.org/api/128/ByteTools'

const res = await fetch("https://barcodeapi.org/api/128/ByteTools");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);

import requests

res = requests.get("https://barcodeapi.org/api/128/ByteTools", timeout=20)
res.raise_for_status()
print(res.json())

{
  "base64": "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",
  "text": "ByteTools",
  "type": "Code128",
  "encoded": "ByteTools"
}

base64string

The barcode PNG, base64-encoded. Prefix it with a PNG data-URI header to use it directly as an image source.

textstring

The human-readable text rendered beneath the barcode.

typestring

The symbology actually used — worth checking when you request `auto`, which picks a format based on the data.

encodedstring

The data as encoded into the symbol, after any padding or check digit the symbology requires.

(image mode)image/png

With `Accept: image/png` the response body is the raw PNG instead of this JSON object.

• Print barcode labels for warehouse or inventory items
• Add scannable SKUs to packing slips and invoices
• Generate EAN-13 codes for a retail product catalogue
• Embed a barcode in a server-rendered PDF via the base64 output

If BarcodeAPI.org does not fit, these utility apis cover similar ground. Every one was called before publishing, and each links to its own reference page with a working curl command and the response it returned.