Base64 to CSV Converter [2025]

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Decode Base64 encoded strings to CSV (Comma Separated Values) format. Includes options for URL-safe Base64, custom delimiters, and header row handling.

✓ URL-Safe Decoding✓ Custom Delimiters✓ Header Row Option

Base64 Input

CSV Output

Key Features

  • Decode Base64 strings to their CSV representation.
  • Supports both standard Base64 and URL-safe Base64 variations.
  • Customize the delimiter used in the CSV output (comma, semicolon, tab, etc.).
  • Option to include or exclude the header row in the output.
  • Skip empty lines in the CSV data.
  • Provides clear error messages for invalid Base64 input.
  • Includes example data for quick testing.
  • Copy input and output.
  • Preview of the decoded CSV data before copying/downloading.

Common Use Cases

Data Extraction

  • • Extracting data from encoded sources
  • • Configuration files
  • • API responses

Debugging

  • • Network traffic
  • • Log analysis
  • • Data inspection

Development

  • • Data conversion
  • • Data processing pipelines
  • • Spreadsheet preparation

Frequently Asked Questions

What is URL-safe Base64?

URL-safe Base64 replaces the '+' and '/' characters with '-' and '_', respectively, making the encoded string safe for use in URLs and filenames.

Why would I need a custom delimiter?

While CSV commonly uses commas, other delimiters like semicolons, tabs, or pipes are sometimes used. This option allows you to correctly parse data that uses a non-standard delimiter.

What does "Skip Empty Lines" do?

If your Base64-encoded data contains empty lines after decoding, this option will remove them from the resulting CSV.

Is my data secure?

All conversion happens directly in your browser. No data is sent to any server or stored anywhere.

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