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GeekFormat

URL Safe Base64

Standard Base64
0 characters

Free online Base64URL converter. Bidirectional conversion between standard Base64 and URL Safe Base64. Perfect for JWT, URL parameters and secure token scenarios.

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Use Cases

  • Convert standard Base64 to URL Safe format for link parameters
  • Process Base64URL encoded parts in JWT tokens
  • Solve compatibility issues with Base64 special characters (+, /, =) in URLs
  • OAuth signature parameters and secure token encoding

Features

  • URL safe format conversion: bidirectional processing between standard Base64 and Base64URL
  • JWT and token scenario friendly: for URL parameters, auth tokens and secure link encoding
  • Reduced special character issues: handles plus signs, slashes, equal signs for URL compatibility
  • Results ready to copy: suitable for API parameters, headers and auth workflows

How to Use

  1. 1.Paste standard Base64 or Base64URL content
  2. 2.Select conversion direction (standard to URL Safe or reverse)
  3. 3.The tool automatically performs character replacement and format conversion
  4. 4.Copy results for URL parameters, JWT or auth workflows

FAQ

What's the difference between Base64URL and standard Base64?

Base64URL replaces characters unsuitable for URLs, making it more suitable for URL parameters, JWT and token scenarios.

Why does JWT often use Base64URL?

Because JWT needs to be safely transmitted in URLs, headers and text environments. Base64URL better reduces special character compatibility issues.

Is it suitable for URL parameters and secure tokens?

Absolutely. Many OAuth, signature parameters and link-type tokens use URL Safe Base64.

Does this tool support bidirectional conversion?

Yes. It can convert standard Base64 to URL Safe format, or restore Base64URL to more common standard encoding representation.