Base64 to JSON Converter

Base64 to JSON Converter

Decode Base64 encoded strings to JSON format instantly. Perfect for API debugging and data analysis.

Convert Base64 to JSON

Paste your Base64 encoded JSON string below to decode it

Features

Instant Conversion

Decode Base64 to JSON in milliseconds

100% Secure

All processing happens locally in your browser

JSON Formatting

Toggle between formatted and compact JSON

What is Base64 to JSON Conversion?

Base64 to JSON conversion is the process of decoding Base64 encoded strings back into JSON format. This is commonly used when JSON data is transmitted through systems that only support text encoding, such as URLs, cookies, or certain API protocols.

This tool decodes your Base64 string, parses it as JSON, and displays it in a readable format with proper indentation. You can toggle between formatted and compact JSON views, and validate that the decoded content is valid JSON.

How to Use This Tool

  1. 1
    Paste your Base64 encoded JSON string into the input field
  2. 2
    Click the “Convert to JSON” button
  3. 3
    View the decoded and formatted JSON in the output area
  4. 4
    Toggle formatting, copy to clipboard, or download as a JSON file

Common Use Cases

API Development

Debug and inspect Base64 encoded JSON payloads in API responses

JWT Tokens

Decode JWT token payloads to view claims and user data

Configuration Files

Extract JSON configuration from Base64 encoded environment variables

Data Analysis

Decode and analyze JSON data stored in Base64 format

Frequently Asked Questions

Is Base64 to JSON conversion secure?

Yes, all conversion happens entirely in your browser. Your Base64 data never leaves your device and is never sent to any server, ensuring complete privacy and security.

What happens if the decoded content is not valid JSON?

The tool will display an error message if the Base64 string decodes to content that is not valid JSON. Make sure your Base64 string contains properly encoded JSON data.

Can I format or minify the JSON output?

Yes! Use the “Format” and “Compact” buttons to toggle between pretty-printed JSON with indentation and minified JSON without extra whitespace.

Is this tool free to use?

Absolutely! This Base64 to JSON converter is completely free with no limitations, registration, or hidden costs.