Base64エンコード
操作
入力（プレーンテキスト）
出力（Base64）
機能
- プレーンテキストをBase64にエンコード
- Base64をプレーンテキストにデコード
- UTF-8安全なエンコード/デコード
- 入力と出力を即座に入れ替え
- 結果をクリップボードにコピー
- 無効なBase64入力を検出
What is Base64エンコード?
Base64 is a binary-to-text encoding scheme that converts binary data into an ASCII string format. It's commonly used to encode binary data for transmission over text-based protocols like email (MIME) and for embedding images or files directly in HTML, CSS, or JSON.
Why Use This Tool
Base64 encoding is essential when you need to safely transmit binary data through text-only channels, embed images in HTML/CSS, store binary data in JSON, or encode authentication credentials in HTTP headers.
使い方
Step 1:Select 'Encode' or 'Decode' mode
Step 2:Paste your text or Base64 string into the input field
Step 3:The result appears automatically in the output field
Step 4:Click 'Copy' to copy the result to clipboard
Step 5:Use 'Swap' to quickly switch input and output
Key Features
✓Encode text to Base64
✓Decode Base64 to plain text
✓Full UTF-8 support for international characters
✓Instant encoding/decoding
✓One-click swap between input and output
✓Invalid Base64 detection