Online SMS QR Code Generator
Pick a payload type, preview live, one-click PNG / SVG download.
What is an SMS QR Code?
An SMS QR code encodes a URI like SMSTO:+1234567890:Confirm. Scanning opens the messaging app with recipient and body pre-filled; the user taps send. Both Android and iOS support it (iOS needs the SMSTO: prefix to keep the body).
Encoding structure
- Format:
SMSTO:number:body(first colon after the number; everything after is the body); - The body supports Chinese and newlines;
- Scanning only pre-fills — it never auto-sends. That is an operator-level safety rule.
How to generate an SMS QR code
- Fill in the number and the message body;
- Use M or higher error correction for longer bodies;
- Test-scan with a real phone to confirm the body is intact;
- Download PNG/SVG.
Typical uses
- Event sign-ups: reply with name + phone;
- Shop promos: reply to claim a voucher;
- Trade-show cards: send your intro in one scan.
FAQ
Is the online SMS QR generator free?
Completely free, no sign-up, unlimited use — everything runs locally in your browser.
How much content fits in one code?
A QR code holds up to ~4,296 half-width characters or 2,953 digits (level L). More content means denser modules — print larger.
Can I add a logo?
Yes. Center the logo, keep the quiet zone intact and set error correction to Q or H for reliable scans. CodeBox's transparent PNG export makes post-processing easy.
Is my data uploaded?
No. CodeBox is a fully client-side tool; your data never leaves your device.
Can I print it?
Yes. Single codes print directly; for bulk output use the batch QR generator for A4 sheets.