How do I encode text to Base64?

Enter your text in the input field, select 'Encode' mode, and click 'Convert'. The tool will convert your text to Base64 encoding instantly. Base64 encoding converts binary data to ASCII text format using 64 characters (A-Z, a-z, 0-9, +, /).

How do I decode Base64 to text?

Paste your Base64 encoded string in the input field, select 'Decode' mode, and click 'Convert'. The tool will decode the Base64 string back to its original text format.

What is Base64 encoding used for?

Base64 encoding is used to encode binary data as ASCII text for transmission over text-based protocols like email, JSON, XML, and URLs. Common uses include encoding images in HTML/CSS, API authentication tokens, and data URIs.

Is Base64 encoding secure?

No, Base64 is NOT encryption or security. It's simply an encoding format that converts data to text. Anyone can decode Base64 strings. Never use Base64 alone for sensitive data - use proper encryption instead.

Base64 Encoder Decoder - Encode & Decode Base64 Online Free

Base64 Encoder Decoder

Encode text to Base64 or decode Base64 strings back to text. Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format using 64 characters.

What is Base64?

Base64 encoding converts binary data into a text format using 64 ASCII characters: A-Z, a-z, 0-9, +, and /. It's commonly used to encode binary data for transmission over text-based protocols.

Common Use Cases

Email Attachments: MIME email encoding
Data URIs: Embedding images in HTML/CSS
API Tokens: Encoding authentication credentials
JSON/XML: Embedding binary data in text formats
URLs: Encoding data in URL parameters
Certificates: PEM format for SSL/TLS certificates

How Base64 Works

Encoding Process:

Convert text to binary (8-bit bytes)
Group binary into 6-bit chunks
Map each 6-bit chunk to Base64 character
Add padding (=) if needed

Example:

Text: "Hello" → Base64: "SGVsbG8="

Important Notes

Base64 is NOT encryption - it's easily reversible
Base64 increases data size by approximately 33%
Padding characters (=) are added to make length divisible by 4
URL-safe Base64 uses - and _ instead of + and /
Never use Base64 alone for security - use proper encryption

Security Warning

⚠️ Base64 is NOT secure!

Base64 encoding is not encryption. Anyone can decode Base64 strings. Never use Base64 to protect sensitive data like passwords or API keys. Use proper encryption (AES, RSA) for security.

Common Applications

Embedding images in HTML: <img src="data:image/png;base64,...">
HTTP Basic Authentication: Authorization: Basic base64(username:password)
JWT tokens: Header and payload are Base64 encoded
Email attachments: MIME multipart encoding
Storing binary data in JSON/XML

🔤 Base64 Encoder Decoder

Base64 Converter