Base64 Encoder / Decoder

Base64 for text and files (standard / URL-safe)

100% In-BrowserNo Server UploadFree, No Signup

Encoding / Decoding

Input Text

Base64 Output

How to Use

Enter text
Type or paste the text you want to encode into the input area.
Encode / Decode
Choose encode/decode and variants from the toolbar, then click "Convert".
Copy result
Use the "Copy" button to copy the result to your clipboard.

Base64 Encoder / Decoder Examples

Base64 encode (standard)

Input

Hello World

Output

SGVsbG8gV29ybGQ=

Select “Encode” and “Standard Base64” in the toolbar.

Base64 decode

Input

U2tpbGxCcmlkZ2U=

Output

SkillBridge

Select “Decode” (whitespace-tolerant decoding is supported).

Features

Full UTF-8 text support
URL-safe Base64 (RFC 4648) support
MIME Base64 wrapping support
File → Base64 and Base64 → file download
Local processing (your input is not sent to servers)
Mobile-friendly responsive design
Dark mode support

FAQ

What is Base64?

Base64 is an encoding scheme that converts binary data into ASCII strings. It is widely used for email attachments, Data URLs, API tokens, and other scenarios where binary data needs to be safely transmitted as text.

Can I encode non-ASCII text?

Yes. This tool uses UTF-8 encoding, so you can encode any Unicode character including Japanese, Chinese, emoji, and more.

Is my data sent to a server?

No. All encoding and decoding happens locally in your browser via JavaScript. No data is ever transmitted externally.