Quick Summary
Base64 Decoder & Encoder is a fast, 100% private web utility to convert raw text strings, UTF-8 payloads, and Data URIs to standard or URL-safe Base64 format and vice versa directly inside browser RAM.
Base64 Decoder & Encoder
Convert text strings into Base64 or decode Base64 data into UTF-8 plaintext with zero server communication.
UTF-8 Base64 Encoding
Encodes strings, emojis, and special international characters safely into standard 64-character ASCII strings.
Instant Base64 decoding
Decodes Base64 strings, URL-safe Base64 tokens, and Data URIs back into readable UTF-8 plaintext.
Memory isolation
Decoding tokens or API credentials on public sites carries security risks. This tool operates 100% in client memory.
Frequently asked questions
How do I decode Base64 online?
Paste your Base64 encoded string into the input box and click 'Decode' (or press Alt+2). The decoded UTF-8 text string will immediately display.
Is Base64 encoding an encryption algorithm?
No. Base64 is a binary-to-text encoding scheme designed to safely transmit data across text-based protocols. It is not encryption and provides no security against decryption.