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Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text instantly.

Input
Output

      

      

        
0
Input length

        
0
Output length

        
0%
Ratio

      

    

  

    
Overview
Encode and decode Base64 for safe transport of text or small files.
Best for
  • Embed small images in HTML or CSS.
  • Inspect encoded API payloads.
  • Inspect encoded payloads from logs.
Step-by-step
  1. Select encode or decode.
  2. Paste text or Base64.
  3. Copy the result.
Examples

        
Example 1

        

          

            
Input

            
hello

          

          

            
Output

            
aGVsbG8=

          

        

        
Simple string encoding.

      

        
Example 2

        

          

            
Input

            
aGVsbG8=

          

          

            
Output

            
hello

          

        

        
Decoding restores the original.

      

        
Example 3

        

          

            
Input

            
aHR0cHM6Ly9leGFtcGxlLmNvbQ==

          

          

            
Output

            
https://example.com

          

        

        
Decodes a URL.

      
Common mistakes
  • Non-Base64 input will decode to garbage.
  • Base64 increases size by about 33%.
  • Line breaks or spaces can break decoding.
Pro tips
  • Use UTF-8 when encoding text.
  • Remove line breaks before decoding.
FAQ
Is Base64 encryption?
No, it is only encoding, not secure.
Does this upload my data?
No. Everything runs locally in your browser.
Can I use it offline?
Yes. After the page loads, most tools work offline. Some assets (like fonts) may need a connection.
Data & privacy
All processing happens locally in your browser. No data is uploaded or stored.