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Base64 URL Encoder

Turn text into a URL-safe Base64 string you can safely drop into a query parameter or path. This free base64 URL encoder produces the variant that swaps + and / for - and _ and drops the = padding, so the result is valid inside a URL. It works instantly in your browser.

Text to encode

URL-safe Base64

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What is a Base64 URL encoder?

A base64 URL encoder converts a string into the URL-safe variant of Base64. Standard Base64 produces characters that clash with URLs: the plus sign, the forward slash and the equals padding are all reserved or awkward in web addresses. The URL-safe alphabet replaces + with a hyphen (-) and / with an underscore (_), and removes the trailing = padding entirely, so the encoded string can sit in a query parameter or a path segment without breaking the link. This encoder is useful when you need to pass a short payload through a link or an API parameter — for example encoding an ID, a token, or a small piece of JSON so it survives transport intact. The text is encoded as a UTF-8 byte sequence first, so emojis, accented letters and other non-ASCII characters work correctly.

How to use

Type or paste the text you want to encode.
The URL-safe base64 result appears instantly.
Copy it and use it in a URL, token or payload.

Example

Encode the text Hello,世界. The result is a compact URL-safe string in the -/ alphabet with no padding, which you can append to a URL or an API parameter.

Common use cases

Passing a short string or ID through a link without special characters.
Encoding a small JSON, token or payload for use in a query parameter.
Storing compact, transport-safe text in a database or config.
Working with APIs that expect Base64URL-encoded values (like JWT signature input).

Pro tips

Use this for text or small payloads that must live inside a URL.
The no-padding output is the JWT-compatible form, handy for token work.
Emojis and accented text work because input is encoded to UTF-8 first.
For a full Base64 encode/decode with the standard alphabet, use the Base64 Encode/Decode tool.

FAQ

What is URL-safe base64?

Standard base64 uses +, / and =, which are not safe in a URL. URL-safe base64 swaps + for - and / for _, and drops the = padding.

Why encode text as base64?

Base64 turns any text or binary into a compact, text-only form that is safe to put in URLs, tokens and JSON payloads.

Does it support emojis and non-ASCII text?

Yes — the text is converted to UTF-8 before encoding, so emojis and other characters work.

Why does the output have no equals sign?

The = padding is optional and is stripped because it is not needed to decode and is not URL-safe.

Where is Base64URL used?

It is widely used in JWTs, OAuth tokens, and anywhere a Base64 value must appear in a URL or path.

Is it private?

Yes — it runs entirely in your browser and nothing is uploaded.

Is it free?

Yes, free and unlimited with no signup.

How do I decode it back?

Use a base64 URL decoder (or flip this tool to decode) to turn the URL-safe string back into the original text.