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uencoder

QR コード生成ツール

Generate QR codes from text or decode QR codes from images。無料、プライベート、100%クライアントサイド。

例を試す:
Local only

最近の履歴

履歴はまだありません

使い方

  1. Enter the text to encode.
  2. Choose size and error correction level.
  3. Download the QR code as PNG, or drop an image to decode.

このツールを使うタスク

よくある質問

What error correction levels are available?
Levels L, M, Q, and H correspond to roughly 7%, 15%, 25%, and 30% recovery capacity. Higher levels produce larger codes but tolerate more damage.
Can I decode a QR code from an image?
Yes. Drop or pick an image file and the tool decodes the embedded text locally using jsQR. PNG, JPEG, and BMP are supported.
What is the maximum data capacity?
Capacity depends on version (1-40) and error correction level. Version 40 with level L holds up to 2,953 bytes of 8-bit data. URLs up to ~2,000 characters are safe.
Which character sets are supported?
UTF-8 text is encoded directly. Numeric mode is more efficient for pure digits; alphanumeric mode for uppercase letters and a few symbols. The tool auto-selects the best mode.
What image formats can I download?
PNG (default, lossless). The generated QR code can be embedded in documents, printed, or shared. SVG is not currently supported.
データはどこかにアップロードされますか?
No. Both encoding and decoding happen entirely in your browser. The text you encode never leaves your device.

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