Plain Text
0 bytesBase64 Output
How to Use This Tool
Enter text or Base64
Type or paste content into the input field.
Choose Encode or Decode
Toggle between encoding plain text to Base64 or decoding Base64 back to text.
Copy or swap
Copy the result or use Swap to feed the output back as input.
Features
Encode & Decode
Seamlessly switch between encoding and decoding with one click.
Real-Time Conversion
Results update as you type — no submit button required.
Swap Direction
Use the output as new input with the Swap button for quick round-trip testing.
One-Click Copy
Copy Base64 output to your clipboard instantly.
Frequently Asked Questions
What is Base64 encoding used for?
Base64 converts binary data into ASCII text. It is commonly used to embed images in HTML/CSS, encode email attachments (MIME), transmit binary data in JSON APIs, and implement HTTP Basic Authentication.
Is Base64 the same as encryption?
No. Base64 is an encoding scheme, not encryption. Anyone can decode a Base64 string without a key. Never use Base64 to protect sensitive data — use proper encryption like AES or RSA instead.
Why does Base64 output end with = signs?
The = characters are padding. Base64 processes input in 3-byte blocks. If the input length is not a multiple of 3, one or two = characters are appended to indicate the missing bytes.
Does Base64 increase the data size?
Yes. Base64 encoding increases data size by approximately 33% because every 3 bytes of input become 4 bytes of output.
Is my data sent to a server?
No. All encoding and decoding happens entirely in your browser. Your data never leaves your device.