Base64 Encode & Decode
Convert plain text, symbols, or files into Base64 format and decode Base64 strings back instantly in your browser.
Plain Text Input (UTF-8)
Base64 Encoded Output
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About Base64 Encoding & Features
Understand how Base64 transforms data safely across web browsers, text APIs, and data protocols.
Base64 is a binary-to-text encoding scheme that converts raw binary data or multi-byte strings into a standardized subset of 64 safe ASCII characters (A–Z, a–z, 0–9, +, /). Because text channels, configuration files, and JSON payloads cannot safely transmit raw bytes without corruption, Base64 ensures uncompromised data integrity.
Full UTF-8 & Emoji Support
Unlike basic browser functions that break on multi-byte characters, our tool handles international text, symbols, and emojis seamlessly.
URL-Safe Variant (RFC 4648)
Instantly swap standard characters (`+`, `/`) for URL-friendly equivalents (`-`, `_`) required for JWT tokens and web queries.
File to Data URI Converter
Upload local text files, PDFs, or images to generate direct Base64 Data URI strings for HTML or CSS embedding.
Instant Live Two-Way Sync
Type or clear inputs to see conversions calculated in real-time without needing to click extra manual submission buttons.
Built-in Test Presets
Quickly load sample strings, JSON objects, and HTML templates to test encoder and decoder accuracy instantly.
100% Private & Secure
Everything executes entirely within your browser environment. Your strings, credentials, and files never leave your computer.