Line Unwrap Tool

The Line Unwrap Tool collapses a wrapped Base64 string into one continuous line, removing line breaks added by MIME or PEM formatting. It is for developers preparing wrapped Base64 for systems that need a single line.

Wrapped Base64 fails in places that expect one unbroken string. Unwrapping it locally produces a continuous line instantly and privately.

1. Paste a wrapped, multi-line Base64 string.
2. The line breaks are removed.
3. Review the single continuous line.
4. Copy it for use where wrapping is not allowed.

• Removes line breaks from wrapped Base64
• Produces one continuous line
• Instant output — Line Unwrap
• Runs in the browser — Line Unwrap

• Preparing a PEM body for a system that wants one line
• Cleaning wrapped Base64 copied from an email
• Joining a multi-line string before decoding
• Normalising data for an API that rejects line breaks

• Confirm the destination wants an unwrapped line before removing breaks.
• Check for stray spaces if decoding still fails after unwrapping.
• Paste only the Base64 body, not surrounding headers or text.

• Leaving other whitespace behind when only line breaks were removed.
• Unwrapping where the standard actually requires wrapped lines.
• Pasting content that mixes Base64 with surrounding text.