Base64 Encode / Decode

What is a Base64 Converter?

A Base64 converter encodes text (or data) into a Base64 string and decodes it back. Base64 turns content into a safe, text-only format that travels reliably through URLs, JSON, emails and data URIs. Fontily encodes and decodes instantly in your browser, with full UTF-8 support.

Features

• Two-way conversion — encode and decode.
• Full UTF-8 support for accents and emoji.
• Instant output as you type.
• Clear error messages for invalid input.
• Private and free — nothing is uploaded.

How to Use the Base64 Converter

1. Choose Encode or Decode.
2. Type or paste your input.
3. The result appears immediately.
4. Copy the encoded or decoded output.

Benefits

Base64 is everywhere in development — from embedding images as data URIs to passing tokens safely in URLs. A quick converter saves you from command-line tools, helps you inspect and debug encoded values, and guarantees correct UTF-8 handling.

Use Cases

• Embedding images/fonts as data URIs.
• Decoding tokens and headers during debugging.
• Encoding data for URLs and JSON.
• Learning how Base64 encoding works.

Conclusion

Fontily's Base64 Encoder / Decoder converts text to and from Base64 in an instant, privately in your browser. Paste your input above and copy the result — free and reliable.