🔀 Base64 Encoder/Decoder

Base64 encoding is a method of converting binary data into ASCII text format. It's commonly used for embedding image data in HTML/CSS, sending data over email, or encoding credentials in HTTP headers.

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📋 How to Use the Base64 Encoder/Decoder

Paste or type your text into the input box.
Select Encode to convert it to Base64, or Decode to turn a Base64 string back into text.
Copy the output with Copy Output.
Use Clear to start again.

🎯 When to Use It

Reading the payload of a Basic Auth header or a token segment.
Embedding a small file in an HTML, CSS or JSON document as a data string.
Checking what an encoded string in a log or an email header actually contains.

💡 Tips & Common Pitfalls

Base64 is an encoding, not encryption. Anyone can decode it, so never use it to hide passwords or secrets.
Encoded output is about a third larger than the input.
If decoding fails, check for stray spaces, line breaks or missing = padding at the end of the string.
Base64 URL-safe strings use - and _ in place of + and /. Swap them back before decoding.

❓ Frequently Asked Questions

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that converts binary data into an ASCII string format. It's commonly used when there's a need to transfer binary data over media designed to handle text.

When should I use Base64 encoding?

Use Base64 when you need to embed binary data in text formats (like images in CSS/HTML), send data through systems that only support text, or encode credentials for HTTP authentication.

Is Base64 encoding secure?

No, Base64 is NOT encryption. It's an encoding scheme that can be easily decoded. Never use Base64 alone to protect sensitive information.

What's the character limit?

Our tool supports up to 10,000 characters to ensure fast performance and prevent browser slowdowns.