Base64 Encode / Decode
Encode and decode Base64 strings online for free. Convert text to Base64 and back instantly.
このツールについて
Encode any text to Base64 or decode Base64 strings back to plain text instantly in your browser. Useful for APIs, data URIs, and web development workflows.
使い方
Enter Text
Type or paste the text or Base64 string.
Encode or Decode
Click Encode to convert to Base64, or Decode to convert back.
Copy Result
Copy the output to use in your project.
活用シーン
API Development
Encode credentials and data for HTTP headers and API requests.
よくある質問
Is my data sent to a server?
No. All encoding and decoding happens locally in your browser.