Base64 Encoder & Decoder
Encode and decode Base64 strings instantly. 100% client-side and secure.
Decode API data without the Alt-Tab
DevConsole Pro automatically decodes Base64 payloads in your network traffic and local storage. No more copy-pasting into tools.
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What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used to transmit data over media designed to handle text.
How it works
Converts every 3 bytes of binary data into 4 ASCII characters using a 64-character alphabet.
Character set
Uses A-Z, a-z, 0-9, +, / (64 total) plus = for padding to ensure proper length.
Size impact
Encoded data is approximately 33% larger than the original binary data.
When to Use Base64 Encoding
Embedding Images in HTML/CSS
Use data URIs with Base64 to embed images directly in HTML or CSS files without separate HTTP requests.
Email Attachments
SMTP protocol uses Base64 to encode email attachments for safe transmission over text-based protocols.
API Data Transmission
Encode binary data in JSON payloads or URL parameters where only text is supported.
Storing Binary in Databases
Store small binary files in text fields or document databases that don't support binary types.
Base64 vs Encryption: Important Differences
Base64 Encoding
- ✓Easily reversible (decode without key)
- ✓Purpose: data transmission, not security
- ✓No protection against viewing data
- ✓Standardized (RFC 4648)
Encryption
- ✓Requires secret key to decrypt
- ✓Purpose: data security and confidentiality
- ✓Protects data from unauthorized access
- ✓Uses algorithms (AES, RSA, etc.)
Important: Base64 is NOT encryption. Never use Base64 to hide sensitive data like passwords or API keys. It provides zero security.