What can I put in a QR code?

URLs, plain text, contact hints, Wi‑Fi network strings (`WIFI:T:…;S:…;P:…;;`), or any short UTF‑8 payload scanners can read. Very long payloads make denser codes that are harder to scan.

What do L / M / Q / H error-correction levels mean?

They set how much of the symbol can be damaged and still decode (~7% / 15% / 25% / 30%). Higher levels add redundancy and make the pattern denser for the same payload—use H for print on rough surfaces, M for clean screens.

What size should I use for print?

Pixel size (128–512) is the PNG canvas, not physical DPI. For print, export a large PNG and place it so each module stays large enough at the final print size; always scan-test a proof.

Is the input uploaded?

No. QR generation happens in your browser only.

Utill.net

QR Code Generator

URLs & Text

Create downloadable QR codes from URLs, text, or Wi-Fi strings. Adjust size and error correction, then preview, copy, or download a PNG.

This conversion runs only in your browser — nothing is uploaded.

Input

Size: 256px

Error correction

Characters—
Size—
Error correction—

Enter text to generate a QR code

What is this tool?

This QR code generator encodes text into a two-dimensional matrix of modules and renders a PNG you can preview, copy, or download. Typical payloads are HTTPS links, short messages, and Wi‑Fi join strings.

Pixel size (128–512) controls the PNG canvas. Error correction (L / M / Q / H) adds redundancy so a partially damaged or dirty print can still scan—at the cost of a denser pattern for the same data.

Generation stays in your browser. Always scan-test at the final display or print size before publishing.

Common use cases

Share a landing page, menu, or event URL on slides, posters, and packaging
Encode a guest Wi‑Fi network string for temporary access cards
Produce a PNG asset for emails, PDFs, or CMS embeds without a design tool

How to use

Paste a URL, plain text, or Wi‑Fi payload into the input.
Set PNG size and error-correction level (M is a solid default; H for harsh print).
Preview the live QR code.
Copy the image (primary), copy the data URL, or Download the PNG—then scan-test.

Examples

Input	Notes
`https://utill.net`	Standard HTTPS URL (Sample button).
`WIFI:T:WPA;S:GuestWiFi;P:example-pass;;`	Common Wi‑Fi join payload; scanners open network settings.
Short plain text `Hello`	Lowest density; easy to scan even at small print sizes.
Very long JSON blob	Dense modules — prefer a short URL that points to the data.

Practical pitfalls

Print resolution: A 256px PNG enlarged to a large poster becomes blurry; keep modules large in physical millimeters, not only high on-screen zoom.
Quiet zone: do not crop the white margin around the code; scanners need that border.
Contrast: dark modules on a light background; avoid low-contrast brand colors or busy photo backgrounds under the code.
Higher ECC helps damaged prints but increases density—if scans fail on clean screens, shorten the payload before only raising H.

References

Last reviewed: 2026-07-27

Frequently asked questions

What can I put in a QR code?: URLs, plain text, contact hints, Wi‑Fi network strings (`WIFI:T:…;S:…;P:…;;`), or any short UTF‑8 payload scanners can read. Very long payloads make denser codes that are harder to scan.
What do L / M / Q / H error-correction levels mean?: They set how much of the symbol can be damaged and still decode (~7% / 15% / 25% / 30%). Higher levels add redundancy and make the pattern denser for the same payload—use H for print on rough surfaces, M for clean screens.
What size should I use for print?: Pixel size (128–512) is the PNG canvas, not physical DPI. For print, export a large PNG and place it so each module stays large enough at the final print size; always scan-test a proof.
Is the input uploaded?: No. QR generation happens in your browser only.