Base64 Encoder & Decoder — Online Tool for Text & Files

Cách dùng

1. 1 Pick Encode or Decode.
2. 2 Paste text or upload a file (up to 5MB).
3. 3 Toggle URL-safe Base64 if you need a variant compatible with URLs and filenames.

Vì sao dùng công cụ này

• Full Unicode support — emoji and CJK characters encode correctly.
• URL-safe variant — replaces + / with - _ and strips padding.
• File-to-Base64 mode for embedding small images / binary in JSON or data URLs.
• Runs in your browser — your data never reaches our servers.

Câu hỏi thường gặp

Base64 Encoder & Decoder là gì?

Base64 is a binary-to-text encoding (RFC 4648) that represents arbitrary bytes using 64 printable ASCII characters (A–Z, a–z, 0–9, plus two extras). The standard variant uses `+` and `/`; the URL-safe variant substitutes `-` and `_` so the output can travel through URLs and filenames untouched. A Base64 Encoder converts text or binary files to and from this representation.

Base64 Encoder & Decoder so với các lựa chọn khác

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