Is the Base64 encoder / decoder free to use?

Yes. It’s free and runs in your browser - no signup, no install.

Does it handle unicode and emoji?

Yes. The tool uses UTF-8 internally, so accented characters, Devanagari, CJK, and emoji round-trip correctly.

What is URL-safe Base64?

A variant that swaps + for - and / for _ so the encoded string is safe inside URLs, cookies, and filenames. The tool lets you toggle between standard and URL-safe output.

Is Base64 encryption?

No. Base64 is an encoding - it can always be reversed without a key. Don’t use it to hide secrets or protect sensitive data.

Can I encode very long strings?

Yes. Encoding runs locally in your browser, so payload length is bounded only by your device’s memory.

Does the tool upload my text to a server?

No. Encoding and decoding happen entirely in your browser.

Base64 Encoder/Decoder

Encode and decode text to/from Base64 format

Privacy-First • No Data Collection

Base64 Encoder/Decoder

Encode and decode text to/from Base64 format. Perfect for data transmission, storage, and embedding text in various applications.

Mode Selection

Text Encoding

Add line breaks (64 chars)

URL-safe encoding

Input Text

Enter the text you want to encode to Base64

Characters: 0Bytes: 0

Output Base64

Base64 encoded result

Characters: 0Bytes: 0

About Base64 Encoding

What is Base64?

Binary-to-text encoding scheme that represents binary data in ASCII

Common Uses

Email attachments, data URLs, API tokens, configuration files

URL-Safe

Replaces + with -, / with _, and removes padding for URLs

Size Increase

Base64 encoded data is approximately 33% larger than original