Base64 Encoder/Decoder
Free Base64 encoder and decoder - instantly encode and decode text. Essential tool for web developers worldwide.
About this tool
Base64 Encoder/Decoder is a free online tool for encoding text and data to Base64 format and decoding Base64 back to original text. Base64 encoding is essential for transmitting binary data over text-based protocols (email, HTTP, JSON). Developers use it for API authentication, image embedding, and file transfer. This tool provides instant encoding and decoding with support for text, URLs, and binary data. All processing happens in your browser.
How to use
- 1Enter text or paste Base64-encoded data
- 2The tool automatically detects whether to encode or decode
- 3For encoding: converts regular text to Base64 format
- 4For decoding: converts Base64 back to readable text
- 5Copy results to clipboard with one click
Specifications and limits
Supports standard Base64 encoding (RFC 4648). Works with text input, files, and URLs. Handles UTF-8 characters correctly. Supports Base64 URL-safe variant. Processing speed: instant. No file size limits for text.