JSON·Tool

Base64 Encoder / Decoder

Use Base64 Encoder / Decoder online — free, private, and 100% in your browser.

Base64 Encoder / Decoder encodes text to Base64 or decodes Base64 back into UTF-8 text. Everything runs locally in your browser, so your data is never uploaded to any server. It's free, fast, and works on every modern device.

How to use

  1. Paste or type your content into the input box.
  2. Click the matching button to run the conversion.
  3. Copy the result — or tweak the options and run again.

Why use this tool

Frequently Asked Questions

Is Base64 Encoder / Decoder free and private?

Yes. Base64 Encoder / Decoder runs entirely in your browser — your data is never uploaded, and the tool is completely free with no sign-up.

How does Base64 Encoder / Decoder work?

It encodes text to Base64 or decodes Base64 back into UTF-8 text. All processing happens client-side with JavaScript, so it's instant and safe even for sensitive data.

Does it work on mobile and all browsers?

Yes. It works in any modern browser on desktop, tablet, and phone — no installation needed.

Related tools

JSON Formatterbeautifies and indents messy JSON into a clean, readable structure, with optional key sorting. JSON Minifiercompresses JSON by stripping whitespace to shrink its size for faster transport. URL Encoder / Decoderpercent-encodes text so it is safe to use in URLs, and decodes it back. Unicode Escape / Unescapeconverts non-ASCII characters into \uXXXX escape sequences, and unescapes them back.