Base64 Encoder/Decoder
Encode and decode text to and from Base64 format.
Key Features
- Encodes any plain text string to Base64 format instantly.
- Decodes Base64 strings back to readable text with a single click.
- Supports URL-safe Base64 encoding that replaces + and / with - and _ for use in URLs.
- Handles Unicode and multi-byte characters correctly during encoding.
- Runs entirely in the browser — your data never leaves your device.
- One-click copy button puts the encoded or decoded result straight on your clipboard.
Frequently Asked Questions
What is Base64 encoding used for?
Base64 is used to safely transmit binary data over text-based protocols. Common uses include embedding images in CSS or HTML, encoding credentials in HTTP headers, and encoding data in JWTs.
Is Base64 a form of encryption?
No. Base64 is an encoding scheme, not encryption. Anyone with the encoded string can decode it instantly. Do not use Base64 to secure sensitive data.
Why does my decoded output contain garbled characters?
The input may not be valid Base64, or the original data was binary rather than text. Ensure the Base64 string is complete and was originally encoded from a text source.