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QR codes and barcodes API

QR codes, UPI payment QR codes and barcodes as SVG or PNG.

Generates codes; it does not read them. What you encode is never logged or kept, and the images are not cached by shared caches.

Base URL https://api.dharun.devNo API key600 requests a minuteThis page as Markdown

QR code for any text

GET/v1/qrPOST

Returns the image itself. Text up to about 2,900 bytes at error correction L.

Also takes POST: The text to encode. Send it as text/plain, or as JSON {"text": "..."} with the other options beside it, up to 256 KB.

What you send here is never written to the log, and the answer is not cached.

Parameter	Description
`text`query	Text to encode (or POST it).
`ecc`query	Error correction: how much damage the code survives. Default M. One of: L, M, Q, H.
`format`query	Image format. Default svg. One of: svg, png.
`size`query	2D codes: width in pixels to stay within, 32 to 2048. Default 256.
`margin`query	Light border (quiet zone), in modules, 0 to 16. Default 4.
`fg`query	Dark colour, hex such as 000000. Default black.
`bg`query	Light colour, hex, or transparent. Default white.

curl

curl -o picture.png "https://api.dharun.dev/v1/qr?text=https://api.dharun.dev&format=png&size=256"

HTML

<img src="https://api.dharun.dev/v1/qr?text=https://api.dharun.dev&amp;format=png&amp;size=256" alt="QR code for any text">

Result

UPI payment QR code

GET/v1/upi-qr

A QR code any UPI app can scan to pay, built to NPCI's upi://pay link format. format=json returns the link instead of the image. Nothing is checked with a bank.

What you send here is never written to the log, and the answer is not cached.

Parameter	Description
`pa`query, required	Payee UPI ID, such as shop@okaxis.
`pn`query	Payee name shown in the app.
`am`query	Amount in rupees, up to two decimals. Leave out to let the payer type it.
`tn`query	Note shown with the payment, up to 80 characters.
`tr`query	Your reference for the transaction.
`mc`query	Merchant category code, four digits.
`format`query	Image format. Default svg. One of: svg, png.
`size`query	2D codes: width in pixels to stay within, 32 to 2048. Default 256.
`margin`query	Light border (quiet zone), in modules, 0 to 16. Default 4.
`fg`query	Dark colour, hex such as 000000. Default black.
`bg`query	Light colour, hex, or transparent. Default white.

curl

curl -o picture.svg "https://api.dharun.dev/v1/upi-qr?pa=shop@okaxis&pn=Sri%20Murugan%20Stores&am=250&tn=Order%2042"

HTML

<img src="https://api.dharun.dev/v1/upi-qr?pa=shop@okaxis&amp;pn=Sri%20Murugan%20Stores&amp;am=250&amp;tn=Order%2042" alt="UPI payment QR code">

Result

Barcode

GET/v1/barcode/{type}POST

Linear barcodes (code128, code39, code93, ean13, ean8, itf, codabar) and 2D codes (datamatrix, pdf417, aztec). Linear codes are sized with scale and height, 2D codes with size. No human-readable text is printed under the bars.

Also takes POST: The text to encode. Send it as text/plain, or as JSON {"text": "..."} with the other options beside it, up to 256 KB.

What you send here is never written to the log, and the answer is not cached.

Parameter	Description
`type`path, required	Kind of barcode. One of: code128, code39, code93, ean13, ean8, itf, codabar, datamatrix, pdf417, aztec.
`text`query	Text to encode (or POST it).
`scale`query	Linear codes: pixels per bar module, 1 to 10. Default 2.
`height`query	Linear codes: bar height in pixels, 10 to 600. Default 80.
`format`query	Image format. Default svg. One of: svg, png.
`size`query	2D codes: width in pixels to stay within, 32 to 2048. Default 256.
`margin`query	Light border, in modules, 0 to 16. The default depends on the code.
`fg`query	Dark colour, hex such as 000000. Default black.
`bg`query	Light colour, hex, or transparent. Default white.

curl

curl -o picture.svg "https://api.dharun.dev/v1/barcode/ean13?text=890123456789"

HTML

<img src="https://api.dharun.dev/v1/barcode/ean13?text=890123456789" alt="Barcode">

Result

Guides

Make a UPI payment QR code for an amount

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