Put a downloadable PDF on a poster without pixelation
A PDF code doesn't carry the document — it carries the web link to it, so the pattern is as compact as any short URL and scales cleanly to poster size when you export the right file. Grab the SVG and the same code prints crisp on an A2 conference wall or a pocket handout.
The mistake that ruins big prints is enlarging the screen preview PNG in a design tool until the modules blur and the corner finder squares go soft. Because the payload here is just a link, you rarely need extreme density — what you need is a resolution-independent export and enough size for the scan distance.
Fill the form to generate a QR code
Match resolution to how far people stand
A PDF link often lives on a poster people scan from a metre or two away — an event schedule, a spec sheet, a menu PDF. Scan distance, not just print size, decides how big the code has to be, and that in turn sets the pixels you need.
As a rule, a phone reads a code from a distance of about ten times the code's width. For a poster scanned from two metres, that means a code around 20cm across, exported large enough to stay sharp at that size.
- Handout in the hand: 1 inch is plenty.
- A4 poster on a wall: 2 to 3 inches.
- A2 stand scanned across a room: 6 inches or more.
SVG for scaling, PNG at 300 DPI otherwise
Export SVG for print. The PDF link is short, so the code is coarse and vector keeps those bold modules perfectly sharp whether you drop it onto a business card or blow it up to fill a poster.
When the print shop only takes raster, size the PNG by multiplying the physical width in inches by 300. A 6-inch poster code needs an 1800px PNG. Export at that size from the start rather than stretching a small one.
Keep the hosted link short and stable
The code points at wherever the PDF is hosted, so a long, messy storage URL makes an unnecessarily dense code and a fragile printed one. Host the file at a short, tidy address before you generate.
Just as important, that address must not change. This is a static code — if you move or rename the PDF later, the printed poster points at nothing. Settle the hosting location before you commit to a large print run.
How to export a high-resolution PDF code
- Host the PDF at a short URL. Upload it somewhere with a clean, permanent link. A long storage address densifies the code and a moved file breaks a static one.
- Paste the file link with https://. Point the code at the direct PDF URL. Skipping the protocol can make some scanners treat it as a search instead of a download.
- Export SVG for the poster. Vector scales to A2 without softening. Use a 300-DPI PNG only when the printer refuses SVG, sized to the print width.
- Scan from the real distance. Print a proof at final size and scan it from where viewers will stand — testing up close hides whether it works across the room.
Technical details
- Maximum characters: 2953
- Recommended error correction: M (medium) — the payload is just a link, so a high-res export at M scans reliably; raise it only if you overlay a logo.
- The code holds the PDF's URL, not the file — a short, permanent host address keeps it coarse and durable.
- Export SVG for poster-scale print; for PNG, pixels = print width in inches x 300.
Frequently asked questions
- Does a PDF QR code store the whole document?
- No. It stores a link to the PDF hosted online, so the code stays as small as a short URL. The file downloads over the internet when scanned. That is why keeping the hosted address short and permanent matters more than the document's size.
- What size should a PDF QR code be on an A2 poster?
- Around 6 inches or larger if people scan it from across a room, because a phone reads a code from roughly ten times its width away. Export it as SVG so that size prints razor-sharp, or as an 1800px PNG at 300 DPI for a 6-inch code.
- Why does my PDF QR code pixelate on a big print?
- You enlarged a small raster export. The screen PNG has a fixed pixel grid, so blowing it up interpolates blurry edges and softens the finder squares scanners rely on. Re-export as SVG, which has no resolution, or as a PNG already at the poster's pixel size.
- Can I update the PDF behind the code after printing?
- Only if you replace the file at the same URL without renaming it. The code is static and points at a fixed address, so keeping the link identical lets you swap the document. Move or rename it and the printed poster leads nowhere.
- Is a hand-held PDF code smaller than a poster one?
- Yes. On a handout people scan from a few centimetres, so 1 inch is plenty. A poster scanned from a metre or two needs several inches because scan distance, not the link itself, drives the size. Export high-res once and reuse it at both scales via SVG.
- SVG or PNG for a printed PDF link code?
- SVG for print and any resizing, since the short PDF link makes a coarse code that vector keeps crisp at any scale. PNG when a print shop only accepts raster, exported at the final pixel dimensions rather than upscaled from the preview.