Generate clean, high-density QR codes for URLs, text, and contact information. 100% client-side rendering with instant lossless PNG download.
Create quick scannable QR codes for marketing materials, posters, business cards, and slide decks.
Encode Wi-Fi connection strings securely without exposing your passwords to third-party tracking generators.
Generates Level H (30% redundancy) QR codes that scan reliably even with partial smudges or tears.
iframe sandbox="allow-scripts..."依据《中文文案排版指北》规范，自动在中文汉字与英文、数字之间添加空格（盘古之白），纠正全角半角标点混用，支持 Markdown 实时排版转换与一键复制。纯本地离线运行。
Fast, 100% client-side regular expression tester and syntax highlighter. Test complex regex patterns with live capture group inspection and zero data transmission.
Distraction-free Pomodoro productivity timer paired with synthesized ambient soundscapes (rain, cafe, white noise). Stay in deep flow state with zero tracking or clutter.
Professional design color palette generator with integrated WCAG 2.1 AA/AAA accessibility contrast auditing. Generate harmonious color schemes and verify legibility instantly.