What is Base64?
Base64 is a technical encoding scheme that converts binary data (or text) into a standard ASCII string format consisting of 64 specific characters. It is heavily used by developers to ensure data remains intact when transmitted across networks or systems that only reliably support standard text.
How Base64 encoding works
Base64 works by taking the original binary data and grouping it into 24-bit chunks. Each 24-bit chunk is then divided into four 6-bit groups. Since 6 bits can represent 64 unique values (2^6), these values are mapped to an alphabet of 64 characters (A-Z, a-z, 0-9, +, and /). The resulting string is always slightly larger (about 33%) than the original data.
Base64 encoding vs encryption
**Base64 is encoding, not encryption.** This is a critical distinction. Base64 provides absolutely no confidentiality, security, or cryptographic protection. Anyone who sees a Base64 string can instantly decode it back to its original form. Never use Base64 to hide passwords, secrets, or sensitive data.
How to encode text to Base64
1. Paste your plain text into the input box above. 2. Click the "Encode to Base64" button. 3. The text will instantly be converted into a Base64 string.
How to decode Base64
1. Paste your valid Base64 string into the input box above. 2. Click the "Decode from Base64" button. 3. The string will be decoded back into readable text.
Common Base64 use cases
Base64 is typically used in specific developer and engineering contexts: * **Data URLs**: Embedding small images (like icons or SVGs) directly into HTML or CSS files to reduce HTTP requests. * **Email (MIME)**: Encoding email attachments to safely traverse mail servers. * **APIs**: Packaging complex binary payloads within JSON API responses. * **Basic Auth**: Standard HTTP Basic Authentication transmits credentials encoded in Base64 (which is why it must always be paired with HTTPS).
Example
**Text → Base64** Input: `Hello World` Base64: `SGVsbG8gV29ybGQ=` **Base64 → Text** Input: `SGVsbG8sIOCkqOCkruCkvuCkteCkueClh+CkvQ==` Text: `Hello, नमस्ते`
Privacy
Your input is processed locally in your browser and is not sent to WordTools Pro servers. All encoding and decoding operations happen directly on your device, ensuring maximum privacy.
Frequently Asked Questions
No. Base64 is an encoding format, not an encryption algorithm. It provides zero security. Anyone can easily decode a Base64 string using standard tools. Do not use it for passwords or secure data.
Yes! Our tool correctly handles UTF-8 Unicode characters. You can safely encode and decode text containing Emojis, Hindi, Japanese, and other non-Latin characters.
Simply paste your normal text into the input field above and click "Encode to Base64". The tool will instantly generate the Base64 representation.
Paste your Base64 string into the tool and click "Decode from Base64". It will convert the string back into human-readable text.
Yes, this tool functions as a free online Base64 decoder. It runs directly in your browser.
No. Your input is processed locally in your browser and is not sent to WordTools Pro servers.
Base64 uses an alphabet of 64 characters: A-Z, a-z, 0-9, +, and /. The equals sign (=) is also used at the end of some strings for padding.
Because Base64 uses 4 characters to represent every 3 bytes of data, the resulting encoded string is always approximately 33% larger than the original input.