Base64 Encoder & Decoder
Encode text to Base64 and decode Base64 back to UTF-8.
Encode
Decode
About Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 to plain text instantly in your browser. This tool operates completely in your web browser. No text inputs are ever sent to remote servers or stored in any database, ensuring 100% data privacy for code, API payloads, or confidential documents.
Client-Side Privacy Guarantee
All text transformations run inside your browser tab. Zero server logging or tracking.
100% Private & Offline Capable
Executes locally via JavaScript. Your text never leaves your device.
Instant Real-Time Results
No network latency or server waits. See outputs instantly as you type.
Frequently Asked Questions
Is Base64 encryption?
No. Base64 is a binary-to-text encoding scheme, not an encryption cipher. Anyone can decode a Base64 string back to its original plain text without a secret key.
How does Base64 encoding work?
Base64 takes binary data in 24-bit sequences (three 8-bit bytes) and splits them into four 6-bit values, mapping each value to a set of 64 standard ASCII characters (A-Z, a-z, 0-9, +, /).
Does this tool support UTF-8 special characters and emojis?
Yes. Our encoder properly handles multi-byte UTF-8 character sequences, accented letters, and modern emojis without encoding artifacts.
Are my encoded strings stored on a server?
No. All encoding and decoding runs in JavaScript inside your browser tab. No payloads are sent over the network.