Free Base64 Encoder

Encode text or data to Base64, with an optional URL-safe variant.

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  • 🔒 Files never leave your device
  • ⚡ Converted in your browser
  • ✅ No account required

Base64 Encoder: The Complete Guide

Convert any text to Base64 instantly. Full UTF-8 support, plus an optional URL-safe variant for use in URLs, cookies, and JWTs.

How to use the Base64 Encoder

  1. Paste or type your code, text, or data into the input box.
  2. Adjust options such as indent size, dialect, or flags when the tool offers them.
  3. The output updates instantly — copy it to your clipboard or download the file.

Features

  • Correct UTF-8 handling
  • Optional URL-safe output (-_ , no padding)
  • Instant, as-you-type encoding
  • Copy or download the result

Why use this tool

  • Embed data in JSON, HTML, or URLs
  • Prepare basic-auth and data URIs
  • Private — runs only in your browser

What is Base64 encoding?

Base64 encoding represents binary or text data using 64 printable ASCII characters, so it can travel safely through systems that only handle text — like email, JSON, HTML data URIs, and URLs. It is encoding, not encryption: anyone can decode it, so never use it to protect secrets.

Frequently Asked Questions

Is Base64 secure?

No — Base64 is reversible encoding, not encryption. Anyone can decode it. Don't use it to hide passwords or secrets.

When should I use the URL-safe option?

Use it when the Base64 will appear in a URL, filename, or JWT, where + / and = characters cause problems.

Is it free and private?

Yes — it's 100% free with no signup, and everything runs locally in your browser, so your data is never uploaded to a server.

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