What is Base64 encoding used for?

Base64 is used to safely encode binary or non-ASCII data in text-only systems. Common uses include HTTP Basic Authentication headers (Authorization: Basic ), embedding images in CSS (data: URIs), and encoding JWT payload sections.

What is the difference between standard and URL-safe Base64?

Standard Base64 uses + and / characters which are special in URLs. URL-safe Base64 replaces + with - and / with _ so the output can be safely used in URLs and filenames without percent-encoding.

Does it support UTF-8 and non-ASCII characters?

Yes. The encoder first converts your text to UTF-8 bytes then Base64-encodes those bytes, correctly handling all Unicode characters including emoji and accented letters.

Text to Base64 Encoder

Encodes any text input as a Base64 string using UTF-8 encoding. Standard Base64 and URL-safe Base64 (replacing + and / with - and _) are both supported. Base64 encoding is used for embedding binary data in JSON, embedding images in CSS, and encoding credentials in HTTP headers.

Text Input

URL-safe Base64 (no padding, - and _ instead of + and /)

Quickly encode strings for HTTP Basic Auth headers, data URIs, JWT payloads, or any system that requires Base64 input.

Frequently Asked Questions

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