QRCodeForPDF
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Audio to QR code that plays anywhere

Upload an audio file, print the QR code, and whoever scans it hears the track in their browser. No app to install, and nothing to reprint when you change the audio.

  • Free, no signup
  • Plays in the browser
  • Swap the track anytime
100% freeNo sign-upAudio up to 3 MBSaved codes never expire

Want to swap the audio later, or see who scans it? Create a free account →

FOUR STEPS

How to make an audio QR code

No account needed to try it. The QR code appears while you are still reading this.

01
Upload the audio
Drag in an MP3, WAV, M4A or AAC file. Up to 3 MB without an account — enough for a 3-minute track at streaming quality, or a couple of minutes of speech. A free account raises it to 10 MB, Pro to 25 MB.
02
Say what people are about to hear
A scan lands on a short page before playback starts: a title, your name or company, and a line of description. It is there because a bare audio file tells nobody what they just scanned.
03
Style the code
Colour, corner shape, error correction. Add a logo and the error correction level is raised automatically, so decorating the code never costs you a scan.
04
Download and test it
PNG at 512, 1024 or 2048 pixels, or SVG when a printer is involved. Then scan it with a real phone before it goes anywhere — a code that works on your monitor and fails on a sticker has still failed.

What is actually inside the square, and why the sound cannot fit in it: How QR codes work

MUSIC, OR SOMETHING ELSE

When a platform link is the better tool

Already on Spotify or Apple Music

Streaming platforms generate their own codes and links, and those are the right choice. Nothing is uploaded and listeners land in the app they already use.

A file on your own machine

An unreleased demo, a rough mix, a guided-tour stop, a voice message on an invitation. There is no platform link to share because the file was never published. That is what this is for.

ON PAPER AND STICKERS

Printing an audio QR code people will actually scan

01
Size follows scan distance
The rule people quote is 10:1 — scan distance divided by ten gives minimum width. A sticker read from arm's length wants about 2 cm; a poster read from across a room wants a lot more. Treat it as a starting point and confirm with a test print.
02
Raise the error correction for anything that gets handled
Stickers on instrument cases, CD sleeves in a crate, flyers in a bag. Level H can lose about 30% of the code and still read. Adding a logo raises the level automatically for exactly this reason.
03
Dark on light, and leave the margin
Inverted codes are legal in the spec and unreliable in practice on older scanners. Keep four modules of blank margin on every side — it is the first thing trimmed when a code has to fit a crowded sleeve, and the most common reason one stops reading.
04
SVG for anything a printer touches
PNG rasterises once at a fixed size and a printer will scale it anyway. SVG carries no resolution, so the same file works on a 15 mm sticker and an A2 poster.
WHY THE SOUND KEEPS PLAYING

Built for audio that lives on a label

Once the sticker is on the bottle the QR code is out of your hands. The things that usually break at that point are the things this is built around.

The recording stays reachable
Three codes on the free plan, with no trial clock and no paywall arriving later. A code held by an account keeps resolving for as long as the account exists.
printed once
2026printed20272028foreverstill scanning
It plays in the browser
No app, no store page, no account for the listener. They point a camera and a player opens, with your title and artwork above it.
Brand it without breaking the scan
Colour, corner shape and a logo in the middle — error correction raised to match, so the code still scans off a curved label.
demo-v1.mp3demo-v2.mp3
Wrong take? Roll it back
Replacing the audio is free on every plan, and every earlier version is kept. The code itself never changes — same squares, same short link, across every revision.
Know whether anyone listened
Scan counts and a daily curve on the free plan. Whether the code on the museum label is being used is a question with an answer.
WHAT PEOPLE PUT BEHIND ONE

Six places an audio QR code does the work

An audio QR code is small enough to sit on a label, and what it opens is something a printed line has no room for.

01

Museum and gallery labels

A curator talks for ninety seconds beside the painting. Record the same stop in a second language and the label on the wall stays where it is.

02

Language flashcards

The back of the card plays a native speaker saying the word — the stress, and the vowel the spelling lies about.

03

Bottles and tasting notes

The winemaker describes the vintage in their own voice. New release, new recording, same neck tag.

04

Packaging and setup guides

Spoken instructions for the step where a printed diagram runs out of room — which hose goes where, how tight is tight enough.

05

Signs people cannot easily read

A notice set in small print gets an audio version beside it, so nobody has to go and find a member of staff and ask them to read it out.

06

Cards and stationery

A recorded message travels on the card itself. The paper is the keepsake and the voice is the part that is hard to write down.

WHERE FREE STOPS

How free is the free audio QR code?

Free is a plan here, not a trial with a clock on it. Three codes stay yours, keep resolving, and never carry an advert. Here is exactly what the paid plan adds.

FreePro
Dynamic codes3100
File size limit10 MB25 MB
Scan history90 days365 days
Swap the file without reprinting
Where and what device people scanned from
Which page people read to
Remove our badge from the scan page
See full pricing
FAQ

Before you print it

Print the code once.
Change the track whenever you like.

Audio to QR code in the time it takes to read this line. No account, no app.

Create the codeNo signup needed
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