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Base64 Encode / Decode Base64URL Encode / Decode URL Encode / Decode HTML Encode / Decode Unicode Escape / Unescape Hex Encode / Decode Hash Generator HMAC Generator
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Base64URL Encode / Decode

Encode text to Base64URL or decode URL-safe Base64 back into readable UTF-8 text for JWT, callbacks, and transport-safe payloads.

Base64URL replaces + and / with URL-safe characters and usually omits trailing padding.

FAQ

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Is this Base64URL tool free?

Yes.

What is the difference between Base64 and Base64URL?

Base64URL uses URL-safe characters and often removes trailing padding, which makes it common in JWTs and callback flows.

Is my input uploaded?

No. Encoding and decoding happen locally.

Can I decode JWT segments with this?

Yes. It works well for JWT header and payload segments.

Does Base64URL always include padding?

No. Many systems omit trailing equals signs, so decoders often need to normalize the input first.

Should I use Base64URL for regular files?

Only if the encoded value needs to be URL-safe. For general transport outside URLs, standard Base64 is usually enough.

How To Use It

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How Base64URL differs from Base64

Base64URL swaps `+` and `/` for `-` and `_`, which makes it safer inside URLs and tokens.

It also often drops padding, which is why copied JWT segments do not always decode cleanly in a plain Base64 tool.

Where developers use Base64URL

JWT headers and payloads use Base64URL, and you will also see it in signed links and callback parameters.

It is the safer choice when an encoded value has to survive query strings, routers, and middleware without getting mangled.

Why decoding sometimes fails

A lot of Base64URL strings get copied out of tokens, cookies, or links after padding has already been stripped.

Normalizing them first helps you tell whether the problem is just formatting or whether the source value is actually broken.

Related Tools

Base64 Encode / Decode

Encode text as Base64 or decode Base64 back to UTF-8 text.
JWT Decoder

Decode JWT headers and payloads locally so you can inspect claims and timestamps.
URL Encode / Decode

Encode unsafe URL characters or decode percent-encoded text.

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