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Base64 Encode

Encode text or files to Base64 format.

When to use this tool

Base64 encoding is fundamental for transmitting binary data over text-based protocols like HTTP, JSON, email (MIME), and JWTs. Developers use it daily to encode API payloads, embed images in CSS or HTML, and store binary data in databases.

How to use

Enter text in the input field or upload a file to encode it to Base64. The encoded string will appear instantly. Click the copy button to use the result in your code, API requests, or configuration files.

Output
Download Image 

								
								
								
							

						


						

							

								

									
Workflow chain

									
Continue with tools that fit this output and developer workflow.

								

								
							


							

								

								
							

						

					

				


				
				

		
How this works


					

				
How this works

				

											
Base64 represents binary data with a text-safe alphabet made from A-Z, a-z, 0-9, plus, slash, and optional equals padding.

											
The encoder reads the input bytes in groups of three and emits four Base64 characters, which makes the output roughly one third larger than the original data.

									

			

		
					

				
Examples

				

											

															
Plain text

							
							

								

									
Input

									
Hello World

								

								

									
Output

									
SGVsbG8gV29ybGQ=

								

							


															
The trailing equals sign is padding added because the input length is not divisible by three.

													

											

															
JSON value

							
							

								

									
Input

									
{"user":"jane"}

								

								

									
Output

									
eyJ1c2VyIjoiamFuZSJ9

								

							


															
Useful when a text-only field needs to carry structured data.

													

									

			

		
					

				
Edge cases to know

				
    
											
  • Base64 is encoding, not encryption. Anyone can decode it.
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  • Padding with = or == is normal, but some URL-safe formats omit it.
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  • Large files become larger after encoding, so avoid Base64 for payloads where raw binary upload is supported.
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Privacy note

				
This free tool processes input in your browser for normal text conversions. Do not paste secrets unless you are comfortable handling them in the current browser session.