LumaTool
Local Processing

Base64 Encode / Decode Online

Encode and decode Base64 text with UTF-8, URL-safe, and Unicode support.

Runs locallyNo uploadYour input is processed in your browser.

Base64 Encode / Decode

Encode and decode Base64 text with UTF-8, URL-safe, and Unicode support.

Examples

Example

Input example 
Plain text: LumaTool
Output example 
Base64: THVtYVRvb2w=

Base64 Encode / Decode processes this example in the browser and lets you inspect the result before copying it.

Decode API Header

Input example 
Base64: dXNlcjpwYXNz
Output example 
Text: user:pass

Base64 Encode / Decode processes this example in the browser and lets you inspect the result before copying it.

URL-safe Base64

Input example 
Standard Base64: aGVsbG8+/w==
Output example 
URL-safe: aGVsbG8-_w

Base64 Encode / Decode processes this example in the browser and lets you inspect the result before copying it.

Privacy note

This tool processes your input locally in your browser. Your text, code, file, or generated value is not uploaded to LumaTool servers.

How to use

  1. Step 1. Open the Base64 Encode / Decode page and paste or enter your input.
  2. Step 2. Choose the action, options, or format you need.
  3. Step 3. Review validation messages before using the result.
  4. Step 4. Copy the output or download it when a download action is available.

Real-world examples

Decode Basic Auth headers, JWT-like segments, and API examples copi...

Decode Basic Auth headers, JWT-like segments, and API examples copied from documentation.

Create URL-safe Base64 tokens for callback state, share links, and ...

Create URL-safe Base64 tokens for callback state, share links, and short browser-only test values.

Check whether copied text is valid Base64 before pasting it into co...

Check whether copied text is valid Base64 before pasting it into config, scripts, or support tickets.

Common use cases

  • Decode Basic Auth headers, JWT-like segments, and API examples copied from documentation.
  • Create URL-safe Base64 tokens for callback state, share links, and short browser-only test values.
  • Check whether copied text is valid Base64 before pasting it into config, scripts, or support tickets.
  • Convert Unicode text safely without breaking emoji, Chinese, Japanese, Korean, or accented characters.
  • Prepare small inline text fixtures for local tests without sending content to a server.
  • Encode and decode Base64 text with UTF-8, URL-safe, and Unicode support.

FAQ

Is Base64 Encode / Decode free?

Yes. Base64 Encode / Decode is available as a free LumaTool web tool.

Do I need to sign in?

No sign-in is required for the public tool pages.

Will my input be uploaded?

No. This tool processes input locally in your browser.

Does it work on mobile?

Yes. The editor, buttons, and result areas are designed for mobile and desktop browsers.

Can I copy or download the result?

Ready tools include copy actions, and file-oriented tools include download actions where useful.

What is Base64 Encode / Decode best used for?

Base64 Encode / Decode is useful for focused developer tools tasks where you need a quick browser-based result without switching tools.

How is my input handled?

This tool processes your input locally in your browser. Your text, code, file, or generated value is not uploaded to LumaTool servers.

Can I use the output in production work?

Yes, but review the result before applying it to production systems. LumaTool helps with utility work, validation, and formatting, but final decisions stay with you.

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