NEOKYRU
NEOKYRU Free Online Tools
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Developer & Coding Tools
100% Client-Side 100% client-side encoding. Zero server transmission.

Base64 Encoder (UTF-8)

Encode text, JSON, and international UTF-8 strings into Base64 format

Encoder, Decoder & JWT Studio

UTF-8 Base64, URL encoding, HTML entities, JWT inspection, and cryptographic hashes calculated 100% in-browser.

Input (Plain Text)51 chars
Output (Encoded)

About Base64 Encoder (UTF-8)

Convert plain text, code, or unicode strings into standard RFC 4648 Base64 format. Full UTF-8 support ensures emoji and non-Latin characters encode without corruption.

Key Capabilities & Features

  • Full UTF-8 multi-byte encoding (supports emoji, Arabic, Asian scripts)
  • Compliant RFC 4648 standard Base64 output
  • Instant copy and download as text file
  • Real-time encoding on keystroke

How to Use Base64 Encoder (UTF-8)

1

Enter Text

Type or paste your text into the input field.

2

Encode

View instant Base64 encoded output.

3

Copy

Copy the encoded Base64 string to your clipboard.

Privacy & In-Browser Execution Guarantee

100% client-side encoding. Zero server transmission.

Frequently Asked Questions

Does standard btoa() support UTF-8?

Standard browser btoa() throws an error on non-ASCII characters. NEOKYRU uses a TextEncoder byte-stream approach for 100% UTF-8 compatibility.

Related Tools in this Suite

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Base64 Decoder (UTF-8)
Decode Base64 strings back to plain text, JSON, or UTF-8 characters
URL Encoder (Percent-Encoding)
Encode query parameters and URLs into percent-encoded format online
JWT
JWT Decoder & Inspector
Decode and inspect JSON Web Tokens locally with expiration warnings