Base64 decoder

Base64 Decoder — Convert Base64 Back to Text Online

Instant Base64 decoding tool that converts Base64-encoded strings back to their original text or binary representation. Essential for developers working with APIs, authentication tokens, and encoded data.

Common Uses for Base64 Decoding

• Decoding API responses and authentication headers
• Extracting JWT token payload information
• Debugging Base64-encoded email content
• Decoding data URIs from HTML/CSS
• Analyzing encoded configuration files
• Security research and data forensics

Simply paste your Base64 string and instantly see the decoded output. Supports standard Base64 and URL-safe Base64 variants. Our decoder handles malformed input gracefully with clear error messages.