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Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 to plain text instantly.

Plain Text

Base64 Encoded

Tip: Simply type in either box to instantly convert to the other format. This tool supports UTF-8 characters properly.

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Free Online Base64 Encode & Decode Tool

Convert text to Base64 encoding or decode Base64 strings back to readable text — all within your browser. UtilHub's Base64 Converter handles both directions in a single interface, supports UTF-8 characters, and gives you instant results as you type. Perfect for encoding API tokens, embedding small assets in HTML/CSS, or decoding mystery strings from logs and configuration files. No installation, no account, no server uploads.

How to use Base64 Encoder & Decoder

  • Select "Encode" or "Decode" mode.
  • Type or paste your text into the input box.
  • View the result instantly in the output box.
  • Click "Copy" to save the result.

Features

  • Two-way conversion — Encode plain text to Base64 or decode Base64 back to readable text in a single tool, with one-click direction toggle.
  • UTF-8 support — Correctly handles multi-byte characters including emojis, CJK characters, and accented letters that break simpler encoders.
  • Real-time output — Results update instantly as you type, so you can see the encoded or decoded output without clicking any button.
  • No data transmission — All encoding and decoding runs locally in your browser. Your data is never sent to any external server.

Frequently Asked Questions

What is Base64 encoding used for?

Base64 converts binary data into a text-safe format using 64 ASCII characters. Developers commonly use it to embed images in HTML/CSS via data URIs, encode API authentication tokens, transmit binary data through text-only protocols like email, and store small assets directly in configuration files.

Can this tool handle special characters and emojis?

Yes. The converter properly handles UTF-8 encoding, which means multi-byte characters like emojis, Chinese/Japanese/Korean characters, Arabic script, and accented Latin letters are all encoded and decoded correctly. Many simple Base64 tools fail on these — UtilHub handles them natively.