URL Tools

Base64URL Encoder / Decoder

Base64URL Encoder / Decoder — encode text to URL-safe Base64URL (using - and _ with no = padding) or decode it back, entirely in your browser.

Encode text using URL-safe Base64 (- and _ instead of + and /). Example: a token that is safe inside a URL.
Base64URL encode
  1. Paste text or a URL.
  2. Encode it to URL-safe Base64.
  3. Copy the output.
Example: convert a token to URL-safe Base64.
Use for Base64 that is safe inside URLs.
Client-sideRuns entirely in your browser — your data never leaves your device, and it works offline once loaded.

Base64URL Encoder / Decoder is a browser-based web developer tool on WebDevToolsBase. Base64URL Encoder / Decoder — encode text to URL-safe Base64URL (using - and _ with no = padding) or decode it back, entirely in your browser. To use it, paste your input and view the result directly in your browser — no signup and nothing to install.

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Base64URL Encoder / Decoder is a free URL Tools utility that runs entirely in your browser — nothing you enter is uploaded.

Text or Base64URL
Result




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How to use Base64URL Encoder / Decoder

  
    
      
  1. Enter or paste your URL into the input field to begin.
    2. 
      
  2. Set Mode so the output fits your use case.
    3. 
      
  3. Watch the output update instantly while you adjust the URL.
    4. 
      
  4. Use Copy to keep or reuse the result.
    5. 
  

  
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About this tool

  
Base64URL Encoder / Decoder runs entirely in your browser. Base64URL Encoder / Decoder converts between raw data and Base64 in your browser, handling text or files locally.

  
Because it runs locally, even sensitive payloads never leave the page. It behaves the same on desktop and mobile, with nothing stored remotely.

    
When to choose Base64Url Encode

  
This tool is for encoding data in the URL-safe Base64 variant.

  
Worked example: You produce a token using - and _ instead of + and / so it survives in a URL.

  
Uses the URL-safe Base64 alphabet, distinct from standard Base64 and from percent-encoding.

  
How does Base64URL differ from Base64?
It swaps + and / for - and _ and usually drops padding, so the result is safe in URLs.

  
Frequently asked questions

  

      
How do I use Base64URL Encoder / Decoder?
Use Base64URL Encoder / Decoder to encode your input without installing anything using the Mode control; everything happens client-side.

      
Do I need an account for Base64URL Encoder / Decoder?
No — Base64URL Encoder / Decoder needs no account, sign-up or installation.

      
Where is my data processed by Base64URL Encoder / Decoder?
Entirely in your browser — Base64URL Encoder / Decoder keeps your data on your own machine and sends nothing anywhere.

      
Is Base64 in Base64URL Encoder / Decoder URL-safe?
Base64URL Encoder / Decoder uses standard Base64 by default and runs locally, so your data is never sent anywhere.

      
Can I use Base64URL Encoder / Decoder without a connection?
Yes — after the first load Base64URL Encoder / Decoder runs entirely offline.

  

  
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