Turn any text or URL into a QR code and download it as a PNG. Pick the error-correction level (L/M/Q/H) — higher levels survive more damage and are better for printing; the size and QR version adapt automatically to your input.
The encoder is written from scratch and runs entirely in your browser: no QR text ever leaves your device, which matters if you encode payment addresses, Wi-Fi credentials or private links.
Frequently asked questions
How much text fits in one QR code?
Version 40 at the lowest error correction (L) holds up to 7,089 digits, 4,296 alphanumeric characters, or 2,953 bytes; higher ECC levels trade capacity for damage resistance.
Which error-correction level should I pick?
M is the everyday default; use Q or H for stickers, packaging or anything that might get scratched.
How big can I print it?
A QR scans reliably at roughly one-tenth of the scanning distance — a 10 cm code works from about a meter away.
中文说明
把任意文本或 URL 变成二维码并下载 PNG。可选择纠错级别（L/M/Q/H）——级别越高越耐污损，更适合印刷；尺寸和版本会根据内容自动适配。
编码器完全手写并在浏览器本地运行：二维码内容不会离开你的设备——在编码收款地址、Wi-Fi 凭据或私密链接时这一点尤为重要。
常见问题
一个二维码能放多少字？
最大版本 40 在最低纠错（L）下可容纳 7,089 位纯数字、4,296 个字母数字字符或 2,953 字节；纠错级别越高容量越小。
纠错级别怎么选？
日常用 M 即可；贴纸、包装等可能磨损的场景建议 Q 或 H。
二维码可以印多大？
大致按扫描距离的十分之一取边长即可——10 厘米的码在约 1 米外可稳定扫描。