Base64 Encode and Decode Online (Free, Private)
Encode text to Base64 or decode Base64 strings online. Free, instant, and private — your data never leaves your browser.
Base64 encoding converts binary or text data into ASCII-safe characters. Developers use it for JWT payloads, data URIs, email attachments, and embedding small files in JSON. It is encoding, not encryption — anyone can decode it.
Common use cases
- Decode a JWT header or payload for debugging
- Encode credentials for HTTP Basic Auth
- Create data URIs for inline images in HTML/CSS
- Safely embed binary data in JSON APIs
Many online Base64 tools send your input to a server. For tokens, passwords, or proprietary data, use a client-side encoder instead.
Encode to Base64 →Decode from Base64 →