ToolPuma Logo

Base64 URL Decoder

Decode URL-safe Base64 back to text.

What Is a Base64 URL Decoder?

The Base64 URL Decoder converts URL-safe Base64 back into plain text. It accepts the '-' and '_' alphabet (with or without padding) and reconstructs the original data, making it easy to decode JWTs, signed URLs, and query-parameter tokens. This free online tool is useful for Base64 URL decoder, Base64url decoder, decode URL-safe Base64. Common use cases include JWT segments, OAuth data, signed URLs, and URL-safe tokens. It is designed for quick browser-based hashing, encoding, decoding, encryption testing, checksum comparison, identifier generation, and cryptography education. For production security, follow the algorithm's current standards, key-management requirements, and application-specific security guidance.

How to Use This Base64 URL Decoder

  1. 1
    Choose the operationSelect encode or decode according to the data you have.
  2. 2
    Paste the inputEnter the text or Base64 value into the input field.
  3. 3
    Check the formatFor Base64url, use the URL-safe '-' and '_' alphabet.
  4. 4
    Review the resultThe converted data appears immediately in the browser.
  5. 5
    Copy the outputUse it in your API test, JWT inspection, data URI, or development workflow.

Frequently Asked Questions

No. This decoder expects the URL-safe alphabet. If your data uses '+' and '/', use the standard Base64 Decoder instead.
Yes. URL-safe Base64 usually omits padding, and this tool restores it automatically before decoding.

Related Developer Tools Tools

Base64 Encoder

Encode text to Base64.

Base64 Decoder

Decode Base64 back to text.

Base64 URL Encoder

Encode text to URL-safe Base64.

Hex Encoder

Encode text to hexadecimal.

Hex Decoder

Decode hexadecimal back to text.

Binary Encoder

Encode text to binary (0s and 1s).

More Developer Tools Tools

Binary Decoder

Decode binary back to text.

HTML Entity Encoder

Convert text to HTML entities.

HTML Entity Decoder

Convert HTML entities back to text.

ASCII to Hex

Convert ASCII text to hexadecimal.

Hex to ASCII

Convert hexadecimal back to ASCII text.

ASCII to Binary

Convert ASCII text to binary.