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Base64 エンコード

Base64 にエンコード

ブラウザで動作 · アップロード不要

このツールとページ内の説明は、現在は英語のみです。動作は同じで、すべてブラウザ内で実行されます。

Direction
  • 何も端末から出ません
  • サーバーによるサイズ制限なし
  • 登録不要・透かしなし
  • 無料

How to encode Base64

  1. Type or paste text, or choose "Encode a file…".
  2. Pick URL-safe Base64, line breaks or a data: URL if you need them.
  3. Copy or download the result.

Good to know

  • Text is encoded as UTF-8, so accents, other scripts and emoji come back exactly.
  • URL-safe Base64 uses - and _ instead of + and / and drops the = padding, as JWTs and many URLs do.
  • Base64 is about a third larger than the original data. It is an encoding, not encryption: anyone can decode it.

よくある質問

Can I encode images?

Yes, any file. For images, Image to Base64 also gives ready-made HTML and CSS snippets.

Is my text or file uploaded?

No. Everything happens in your browser, and the page is blocked from uploading anything.