Bulk QR code generator

How batch generation works

Each line is treated as an independent static QR code. The same colour, error correction, module style, size and quiet zone settings used by the single generator are applied to every line, so a whole batch stays visually consistent.

Because all the encoding happens locally, there is no queue, no file size limit imposed by a server and no risk of a list of private product URLs ending up in somebody else's logs. Large batches simply take a few seconds of CPU time on your machine.

What is inside the ZIP file

Files are named qr-001, qr-002 and so on, in exactly the same order as the lines you pasted. A manifest.csv accompanies them with two columns, file and value, so you can join the results back to a spreadsheet without guessing.

• qr-001.svg ... qr-NNN.svg (or .png) - one code per line
• manifest.csv - maps each filename to the value that produced it
• UTF-8 BOM in the CSV so Excel opens accented characters correctly

SVG or PNG for a large batch

SVG is a vector file: it stays sharp at any print size and takes very little space, which makes it the right choice for labels, packaging and anything going to a printer. PNG is a fixed-resolution bitmap and is easier to drop into slides, documents or a content management system.

PNG batches are slower and larger because every code has to be rasterised through a canvas. If you only need images, generate the batch once at 512 or 1024 px and keep the same size across all files.

Practical limits and tips

The batch limit is 500 lines. Very long values may exceed what a QR code can hold at the chosen error correction level; those lines are skipped and the count is reported when the export finishes, so check the status message before assuming every line was produced.

Copy the column straight out of a spreadsheet, one row per line, and keep a header out of the paste. Test the first three files against the manifest before sending a full print run to a supplier.

For labels that will be scanned close up, 3 to 4 cm of printed width and a four-module quiet zone are usually enough. Increase error correction to H only when a logo or rough surface will cover part of the pattern.