Developer

Base64 Encoder/Decoder

Use a Base64 encoder/decoder to convert text to Base64, decode Base64 strings, and inspect encoded data in the browser.

Conversion settings

Choose whether to encode text to Base64 or decode an existing Base64 string.

Conversion modeText to encode

Base64 output

Copy the converted result or adjust the source text until the output matches what you need.

Mode: Encode
Input: 62 chars
Output: 84 chars

Output

VXRpbGl0eVRvb2xzT25saW5lIGlzIGJ1aWx0IGZvciBxdWljayBicm93c2VyLWJhc2VkIHdvcmtmbG93cy4=

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Why use a base64 encoder decoder

A base64 encoder decoder is useful when text, tokens, or file snippets need to move through systems that expect encoded data. It turns readable text into Base64 and converts Base64 back into plain text without leaving the browser.

That makes this page useful for quick checks during development, content review, and debugging. If you searched for base64 encoder, base64 decoder, or base64 converter, this page is meant to give you the tool itself instead of a long explanation first.

When to encode or decode Base64

Encode text to Base64 when a system needs a transport-safe string for an API payload, token, or example value. Decode Base64 when you need to inspect the original text hidden inside an encoded string.

That workflow is especially useful when you are checking authorization headers, sample payloads, fixture data, or copied values from another app. A browser-based Base64 decoder is often enough for that kind of quick review.

Base64 conversion for developers

Developers often need to encode text to Base64 when preparing examples, fixtures, or sample config values. They also need a fast way to decode Base64 strings when reviewing logs or copied data from a third-party service.

This page stays focused on that simple round trip. You can paste text, convert it, and move on without opening a separate script, shell command, or online decoder that is packed with unrelated features.

Base64 vs Base64url

Standard Base64 uses plus, slash, and padding characters. Base64url is a close variant that swaps in URL-safe characters so tokens can travel more comfortably inside links and JWT segments.

If you are working with a JWT or another token format, decoding the right variant matters. This page keeps the plain Base64 workflow simple while still making it easy to inspect the underlying text when you need to verify the contents.

FAQ

What does this Base64 encoder decoder do?

It converts readable text to Base64 and decodes Base64 strings back into plain text in the browser.

Can I use it to decode JWT segments?

It can decode Base64 and Base64url-style strings, which is useful when you want to inspect JWT header or payload segments.

Is the conversion done locally?

Yes. The conversion happens in the browser, so you can inspect or encode strings without sending them to a server.