Does it support MIME line breaks?

Yes — the 76-character wrapping option produces the folded form used in email headers and some PEM blocks.

Does it handle non-ASCII text?

Yes. Input is encoded as UTF-8 before Base64, so accented characters, CJK text and emoji round-trip correctly.

No. It is a reversible encoding with no key — anyone can decode it. Use the AES tool if you need confidentiality.

Conversion · Base64

Convert text to Base64 and back, in standard or URL-safe alphabet, with optional 76-character MIME line breaks.

0 chars 0 chars Standard

Encode text → base64

Plain text UTF-8

Format

Line breaks every 76 chars

Decode base64 → text

Base64 data standard or URL-safe

Format

Strict mode (reject invalid characters)

Short inputs convert automatically as you type — longer ones wait for the button. Client-side only

Standard or URL-safe alphabet?: Both. Switch the alphabet before converting; URL-safe swaps "+" and "/" for "-" and "_" so the value can go in a query string or filename.
Does it support MIME line breaks?: Yes — the 76-character wrapping option produces the folded form used in email headers and some PEM blocks.
Does it handle non-ASCII text?: Yes. Input is encoded as UTF-8 before Base64, so accented characters, CJK text and emoji round-trip correctly.
Is Base64 encryption?: No. It is a reversible encoding with no key — anyone can decode it. Use the AES tool if you need confidentiality.