Base64 Encoder/Decoder

Base64 Encode / Decode

Base64 编码和解码，支持 URL-safe 模式

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Base64 Encoder/Decoder

Online Base64 encoding and decoding tool

Runs locally · Nothing uploaded

Overview

A simple yet powerful Base64 encoding and decoding tool supporting both text and file content. It offers standard Base64 and Base64URL encoding schemes with real-time conversion, making it an essential utility for developers working with data encoding.

Features

  • Base64 encoding & decoding
  • Base64URL safe encoding
  • Plain text input support
  • File content encoding
  • Real-time bidirectional conversion
  • One-click copy result
  • Special character & multi-byte handling

How It Works

  1. 1 Paste or enter the text to be encoded in the input area
  2. 2 Click "Encode" to convert the text to Base64 format
  3. 3 Or click "Decode" to restore Base64 back to original text
  4. 4 Review the real-time conversion result
  5. 5 Copy the result to your clipboard for use

Tips

  • Use Base64URL encoding when placing encoded data in URL parameters
  • Base64 encoded data increases in size by approximately 33% — this is an inherent characteristic
  • Decode API-returned Base64 data first before inspecting the original content

Related tools

Tags Base64EncodeDecode

FAQ

What is the difference between Base64 and Base64URL?

Standard Base64 uses + and / characters, while Base64URL substitutes them with - and _, making it suitable for URLs and filenames without special character conflicts.

Is Base64 encryption?

No, Base64 is an encoding method, not encryption. Anyone can easily decode it. It is used for data transport, not data protection.

Does it support Chinese text?

Yes, the tool correctly handles UTF-8 multi-byte characters including Chinese, Japanese, Korean, and more for both encoding and decoding.

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