Base64 Encode

FAQ

What is Base64 encoding?+

Base64 turns binary or text bytes into an ASCII string using A–Z, a–z, 0–9, +, /, and = padding. It is common in APIs, data URIs, and email attachments.

Does this use UTF-8?+

Yes. Text is encoded as UTF-8 bytes before Base64. Unicode and emoji round-trip correctly when you decode with the matching Base64 Decode or Base64 to Text tools.

Is my data uploaded?+

No. Encoding runs entirely in your browser. Your input never leaves the device.

Why does Base64 output end with = characters?+

Padding keeps the encoded length a multiple of four characters. One = means two input bytes were left over; two = signs mean one leftover byte. Some APIs accept unpadded Base64, but standard RFC 4648 includes padding.

Is Base64 the same as encryption?+

No. Base64 is encoding — anyone can decode it. Use proper encryption or signing when you need secrecy or integrity. Base64 only makes binary data safe to paste into text.