Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 to text.
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Buy me a coffeeWhat is Base64 Encoder/Decoder?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used to embed images in HTML/CSS, encode data for URLs, send binary data via JSON APIs, and store complex data in cookies or local storage. Our tool encodes and decodes Base64 with full UTF-8 support, meaning it handles special characters, emojis, and international text correctly.
How to Use Base64 Encoder/Decoder
Common Use Cases
- Embedding images directly in HTML/CSS as data URIs
- Encoding data for safe URL transmission
- Encoding credentials for HTTP Basic Authentication headers
- Storing binary data in JSON payloads
- Debugging encoded API requests and responses
Frequently Asked Questions
Does Base64 provide encryption?
No, Base64 is encoding, not encryption. It's easily reversible and provides no security. Never use it to hide sensitive data—anyone can decode it instantly.
Why does Base64 make data larger?
Base64 converts every 3 bytes of input into 4 characters of output, increasing size by about 33%. This is the trade-off for making binary data safe for text-based systems.
What characters are in Base64?
Standard Base64 uses A-Z, a-z, 0-9, plus (+), and slash (/). The equals sign (=) is used for padding. URL-safe Base64 replaces + with - and / with _.