JSONView

JSON Base64 Encoder & Decoder

Encode JSON to Base64 or decode Base64 to JSON

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About This Tool

Base64 encoding is a widely used method for converting binary or text data into ASCII characters, making it safe for transmission in URLs, API headers, email attachments, and configuration values. Our free online JSON Base64 encoder and decoder handles both directions — encode valid JSON to a Base64 string, or decode a Base64 string back to formatted JSON. The tool validates JSON on both encode and decode operations, ensuring data integrity. It supports full Unicode through proper UTF-8 encoding, so emojis, accented characters, and non-Latin scripts all work correctly. Simply paste your JSON or Base64 string, select the direction, and get instant results. Essential for working with OAuth tokens, API authentication headers, data embedding, and configuration management. Works entirely in your browser — your data never leaves your device.

How to Use

  1. Select Encode or Decode mode using the toggle above
  2. Paste your JSON (to encode) or Base64 string (to decode)
  3. Click Encode/Decode to see the result instantly

Frequently Asked Questions

What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents data using 64 ASCII characters. It is commonly used to safely embed data in URLs, headers, and text-based formats.
Why would I Base64 encode JSON?
Common use cases include embedding JSON in URL parameters, storing JSON in systems that only handle ASCII, passing JSON through API headers, or encoding OAuth tokens.
Is JSONView's Base64 tool free?
Yes, completely free. No signup, no limits.
Does it support Unicode characters?
Yes. The tool properly handles Unicode characters through UTF-8 encoding, so emojis, accented characters, and non-Latin scripts all work correctly.
Does my data get sent to a server?
No. All encoding and decoding happens in your browser. Your data never leaves your device.

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