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Base64 Encoder / Decoder

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

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Output

      

      

        
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Output length

        
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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.

    

    
Why this page is useful in real work

    
The widget gives you a fast result. This review section explains where that result is genuinely useful and where a second check still matters before you act on it.

    

      

        
Real workflow fit

        
Developers checking webhook bodies, data URIs, transport-safe strings, and lightweight fixtures during debugging.

      

      

        
What this output still does not decide

        
Base64 is encoding rather than protection. A clean decode does not mean the data is safe, trusted, or ready to publish.

      

      

        
Review before you share or ship

        
  • Whether the source is plain text, binary bytes, or a file fragment.
  • If the target expects standard padding or the URL-safe alphabet.
  • Whether the decoded content contains secrets, tokens, or personal data.

      

      

        
A practical workflow that keeps this page useful

        
  1. Decode a representative sample and confirm the characters or bytes look right.
  2. Compare the decoded result with the system that originally produced it.
  3. Re-encode only after the transport format and alphabet rules are clear.
  4. Keep the original source nearby so you can catch accidental mutations.

      

      

        
Best next step

        
If the data is sensitive, pair encoding with real encryption or signed transport instead of treating Base64 as a security layer.