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Base64 URL Decoder

Decode URL-safe Base64 strings back into readable text.

Tool

Use this Base64 URL decoder to convert URL-safe Base64 values back into readable text. It is useful for JWT parts, compact web tokens, query-safe encoded strings, and any workflow where regular Base64 decoding is not appropriate because the input uses the URL-safe character variation.

About this tool

Use this Base64 URL decoder to convert URL-safe Base64 values back into readable text. It is useful for JWT parts, compact web tokens, query-safe encoded strings, and any workflow where regular Base64 decoding is not appropriate because the input uses the URL-safe character variation.

Use base64 url decoder when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.

Learn more

Base64 URL Decoder Guide

Read step-by-step usage guidance, best practices, and common mistakes.

Base64 URL Decoder FAQ

See common questions and answers about input, output, and tool usage.

Base64 URL Decoder Examples

Review practical input and output examples before running the tool.

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Why use this tool

How to use

  1. Paste the Base64 URL string into the input box.
  2. Run the tool to decode it.
  3. Review the readable output.
  4. Copy the result for debugging, inspection, or reuse.

Examples

Example

Input

SGVsbG8

Output

Hello

Decodes a simple URL-safe Base64 value back into text.

Example

Input

eyJzdWIiOiIxMjMifQ

Output

{"sub":"123"}

Useful for reading compact token payload data.

Common errors

The input is incomplete or pasted with missing characters.

Fix: Paste the full URL-safe Base64 value before decoding.

A regular Base64 string is used instead of a Base64 URL value.

Fix: Use the matching decoder for the format you actually have.

The user expects signature or token verification instead of plain decoding.

Fix: Remember that decoding shows content, not validity or trustworthiness.

FAQ

What does a Base64 URL decoder do?

It converts URL-safe Base64 encoded strings back into readable text.

Is this the same as normal Base64?

It is similar, but Base64 URL uses a safer character set for URLs and tokens.

When is Base64 URL decoding useful?

It is useful for JWT-style data, compact tokens, and other web-safe encoded values.

Is this Base64 URL decoder free to use?

Yes. It works online in the browser.

What happens if I use a normal Base64 decoder on URL-safe input?

It may fail or require character conversion first, so a Base64 URL decoder is the safer choice.

Use cases

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