Base64 Encoder/Decoder
Online Base64 text encoding/decoding and image conversion.
Encode
Decode
Input
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0 chars
Result
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0 chars
LOCAL All operations are performed locally in the browser and no data will be uploaded.

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme used to represent and transfer binary data in text-based environments.

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Core Value

  • Strong cross-platform compatibility
  • Simple and efficient encoding/decoding
  • Supports image/file to text conversion
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Common Uses

  • Data URI (Image to Base64)
  • Email attachments (MIME)
  • Binary data embedding in XML/JSON
  • Simple URL encoding
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Scenarios

  • Front-end image icon optimization
  • API file content transfer
  • Simple sensitive info hiding
  • Certificate and key file storage
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Technical Features

  • Size increases by ~33% after encoding
  • Non-encryption algorithm (encoding only)
  • Fixed character set (A-Z, a-z, 0-9, +, /)

🚀 How to Use

  • Encode mode: Enter text or click 'Upload Image', the tool will generate the corresponding Base64 string in real-time.
  • Decode mode: Paste a Base64 string, the tool will restore it to the original text. If it's an image Base64, a preview will be provided.
  • Click 'Copy Result' or 'Download' to get the processed data.

💡 FAQ

Does Base64 encoding encrypt data?
No. Base64 is only an encoding method to ensure safe transmission of binary data as text. Anyone can easily decode it. Do not use it for encrypting sensitive data.
Why does the file get larger after Base64 encoding?
Every 3 bytes of data are encoded into 4 characters, so the size typically increases by about 33% compared to the original data.

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