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Base64 En/Decode

Encode text or files to Base64 and decode Base64 back to text or binary — 100% client-side.

Variant: Standard URL-safe

Line-wrap at 76 chars

Plain Text

Base64 Output

Quick encode:

About Base64

Base64 encodes binary data as ASCII text using 64 printable characters (A–Z, a–z, 0–9, +, /). Common uses: embedding images in HTML/CSS, HTTP Basic Auth headers (Authorization: Basic <base64>), JWTs, and safely passing data through URLs. URL-safe variant replaces + → - and / → _. Encoded output is ~33% larger than the input.