file tools

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 to text instantly. Free online Base64 converter for data encoding and decoding.

Plain Text

How It Works

Base64 is a binary-to-text encoding scheme that represents binary data as an ASCII string. It is commonly used to encode data for transmission over media designed to handle text, such as email (MIME) and within JSON or XML documents.

Formula

Base64 = btoa(Text) / Text = atob(Base64)

Encoding converts each 3 bytes of binary data into 4 Base64 characters (A-Z, a-z, 0-9, +, /). Decoding reverses this process, converting 4 Base64 characters back into 3 bytes of the original data.

Examples

Input	Output
Hello World	SGVsbG8gV29ybGQ=
SGVsbG8gV29ybGQ=	Hello World
toolsconverter.online	dG9vbHNjb252ZXJ0ZXIub25saW5l

Frequently Asked Questions

What is Base64 encoding used for?▾

Base64 is primarily used to encode binary data (like images or files) into text format for safe transmission over text-based protocols like email (MIME), HTTP, or for embedding data in JSON/XML.

Does Base64 encryption secure my data?▾

No, Base64 is encoding, not encryption. It does not provide any security or data protection. Anyone can decode Base64 data. For security, use encryption algorithms like AES instead.

How much does Base64 increase file size?▾

Base64 encoding increases data size by approximately 33%. Every 3 bytes of input become 4 bytes of Base64 output.