Base64 Tools

B64 Decoder

B64 Decoder decodes Base64 back to UTF-8 text and switches direction with one toggle. It runs in your browser with nothing uploaded to any server.

Client-sideRuns entirely in your browser — your data never leaves your device.

B64 Decoder is a free Base64 Tools utility that runs entirely in your browser — nothing you enter is uploaded.

Input
Output



  
How to use B64 Decoder

  
    
      
  1. Start by adding the text you want to decode into B64 Decoder.
    2. 
      
  2. Set Mode so the output fits your use case.
    3. 
      
  3. The result is computed live in your browser as you edit the input.
    4. 
      
  4. Finish by choosing Copy to take the output with you.
    5. 
  

  
About this tool

  
B64 Decoder runs entirely in your browser. B64 Decoder encodes or decodes Base64 on your device with no round-trip to a server.

  
Binary-safe handling means images and other files survive the round trip intact. It behaves the same on desktop and mobile, with nothing stored remotely.

  
Frequently asked questions

  

      
What is B64 Decoder for?
B64 Decoder runs entirely on your device: add your input using the Mode control, and it decodes it locally in real time.

      
Does B64 Decoder cost anything?
No — B64 Decoder is completely free, with no sign-up and no hidden limits.

      
Is my input private in B64 Decoder?
Yes — your input never leaves your device; B64 Decoder does all the work in your browser.

      
Is Base64 in B64 Decoder URL-safe?
B64 Decoder uses standard Base64 by default and runs locally, so your data is never sent anywhere.

      
Does B64 Decoder work offline?
Once the page has loaded, B64 Decoder keeps working with no network connection.

  

  
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