QR9.NET

About QR9.NET

QR9.NET provides lightweight online tools that work without registration. The product principle is simple: tool input is processed locally in your browser and is not uploaded to QR9.NET servers for computation.

What we provide

Common tools include color picking, text encoding conversion, audio to MIDI, timestamp conversion, and Bcrypt hashing or verification.

The site also includes JSON/XML formatting, hash calculation, QR code generation and decoding, image EXIF viewing, plus selected encryption, signing, and key format tools.

Typical use cases

  • Pick a color from a webpage, image, or design file and convert it to HEX, RGB, HSL, and other formats.
  • Debug text conversion across UTF-8, Base64, Hex, URL encoding, and Unicode escape sequences.
  • Convert a local audio file to MIDI for melody extraction, transcription reference, or arrangement drafts.
  • Convert second or millisecond timestamps and ISO dates while debugging APIs, logs, and databases.
  • Generate or verify Bcrypt hashes and inspect cost, plaintext matches, and compatibility issues.

Data handling principles

The tools currently provided by this site run in the browser. Text, files, and keys are not uploaded to QR9.NET servers as tool computation input.

See the privacy policy for access logs, browser request metadata, and third-party analytics.

Contact and feedback

If you find incorrect results, unclear page copy, or a security issue, contact us at 470589027@qq.com.