QR codes to PDF

Anything writable as a line of text encodes cleanly, because a QR code carries characters, not file types. URLs are the common case, but mailto: and tel: links, plain instructions, product SKUs, serial numbers, geo: coordinates, vCard contact blocks and WIFI: network strings all work — with one structural caveat: each line of the box becomes its own code, so formats that would normally span several lines, such as a full vCard, must be written on one line using the escape sequences those formats define. Keep values short where you can. The pattern grows with the amount of data, so a 300-character payload prints as a far denser grid than a 30-character link and needs either a bigger cell or a closer scan. The tool never visits or validates what you paste; it only encodes it.

Every code is generated at error correction level M, the medium setting, which the QR standard defines as recovering roughly 15 percent of a damaged pattern. That is the usual choice for print: it survives the smudges, creases and partial coverage labels pick up in normal handling, without inflating the pattern the way the higher levels do. Level M is fixed in this version, so if you need the heavier protection of level Q or H — for a code that will live outdoors, sit under lamination, or have a logo placed over it — generate that one with a tool that exposes the setting. For asset tags, table cards, shelf labels and printed links, level M with a clean black-on-white print and an intact quiet zone is more robust in practice than raising the level.

Cell size is arithmetic you can predict: printable width is the page width minus both margins, divided by the number of codes per row. On A4 with the default 36-point margin and three codes per row, each cell is about 174 points — roughly 61 mm — and the code fills it minus a small inset. Six per row on the same page gives about 87 points, near 31 mm. The number of modules in the pattern grows with the payload, so the same cell holds either a short link as chunky, forgiving squares or a long one as a fine grid that phones have to be held closer to read. When your values are long, use fewer codes per row, shorten the links first, or widen the printable area by reducing the margin.

A caption is dropped when its value contains characters that cannot be drawn as PDF text, and an amber notice tells you how many and why. Labels are set in 8-point Helvetica; if any value needs characters Helvetica does not cover, the whole sheet switches to an embedded Unicode font instead. Some characters — CJK scripts and emoji in particular — fall outside even that font, and those individual captions are left out rather than printed as empty boxes. The QR code itself is never affected: the payload is encoded as an image, so it carries any script intact and scanning still returns the full value. Long captions are shortened with an ellipsis to fit their cell, and there too only the caption is truncated. You can switch labels off entirely with the Text label chip.

Up to 200 values are used per PDF, and anything past that is ignored with a visible warning rather than quietly dropped. Within that limit the layout fills the grid you chose and starts a new page whenever the cursor runs past the bottom margin, so a hundred codes at three per row simply becomes several pages of the same sheet. The cap exists because generating and embedding hundreds of images is memory-hungry on modest devices, and 200 already fills multiple pages comfortably. If you have more, split the list and download the sheets in batches — or generate each batch and combine the files with PDFChamp's Merge PDF tool. The live preview always renders the first twelve codes, so you can check spacing and captions before committing to the full sheet.

Nothing you type into the values box is transmitted, and the URLs in it are never visited. Encoding happens in the tab: a QR generator turns each line into a pattern and a PDF writer assembles the sheet, both loaded as part of the page. The only network traffic this tool can cause is fetching its own code from pdfchamp.app and — if a caption needs characters Helvetica cannot draw — one font file, also served from pdfchamp.app. Your list stays in the browser's memory and the PDF is built and saved locally. The tool is free, with no account, no per-sheet charge and no watermark on the output. That matters when the payloads are internal asset IDs, private Wi-Fi credentials or unpublished links you would rather not hand to a third party.