Base64 Decode
Convert Base64 encoded strings back to plain text. Supports multiple charsets, line-by-line mode, and instant copy.
Base64 Input
0 chars
100% Private
Decoding runs entirely in your browser. Nothing is sent to any server.
Instant
Results appear in milliseconds using native browser atob() API.
Multi-Charset
UTF-8, ASCII, ISO-8859-x, Windows codepages — pick the right one.
Line Mode
Toggle line-by-line decoding for batch processing multiple values.
Input
SGVsbG8sIFdvcmxkIQ==↓ decode
Output
Hello, World!