Text to Base64 Converter

Worked example

Example: encode `user:password` to Base64 for an HTTP Basic Authorization header example in documentation.

When to use this

• Generating Basic auth header values.
• Embedding small config blobs in env vars.
• Creating test fixtures for unit tests.

Common examples

• UTF-8 email header value → Base64 for debugging MIME parts.
• Small JSON claim → Base64 segment inspection before JWT assembly.
• Data URL prefix stripped → decode image bytes from `data:image/png;base64,...` payloads.
• Small SVG icon → data URL for inline HTML email test.
• UTF-8 string with emoji → Base64 for API fixture matching production encoding.

Common mistakes

• Encoding credentials and committing them to git.
• Using standard Base64 where URL-safe variant is required.
• Double-encoding already encoded strings.

How it works

Encodes plain text to Base64 or decodes Base64 back to text on your device using standard encoding. Large inputs are processed locally.

Limitations

Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.

Privacy and file handling

Your image stays on your device and is not uploaded.