🍋 Format Tools
Base64 Encoder / Decoder
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About Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text. See size comparison, data URI format, and URL-safe variants.
How It Works
Paste text to encode as Base64, or paste Base64 to decode back to text. Shows size comparison and data URI format.
Frequently Asked Questions
What is Base64 encoding?
Base64 converts binary data to ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). It's used in email, data URIs, and API payloads.
Why does Base64 increase size?
Base64 represents 3 bytes of data as 4 characters, resulting in ~33% size increase. It trades space efficiency for safe text transmission.