Base64 Encoder / Decoder
Encode and decode Base64 strings instantly. URL-safe mode supported. All processing in your browser.
Input
Output
How to Use
- Choose Encode or Decode mode using the toggle at the top.
- Paste your text or Base64 string into the input area.
- The result appears instantly — click Copy to copy it to your clipboard.
Frequently Asked Questions
- What is Base64?
- Base64 is an encoding scheme that converts binary or text data into a set of 64 ASCII characters. It is widely used to embed images in HTML/CSS, encode email attachments, and safely transmit binary data over text-based protocols.
- Is Base64 encryption?
- No. Base64 is encoding, not encryption. It provides no security — anyone who receives a Base64 string can instantly decode it. Do not use it to protect sensitive data.
- Why does the output sometimes end with <code>==</code>?
- The <code>=</code> characters are padding. Base64 works in groups of 3 bytes; when the input length isn't divisible by 3, one or two padding characters are added to complete the final group.
- Can I encode files with this tool?
- Currently this tool supports text encoding. To encode a file, paste the raw text content of the file into the input field.