Base64 Encoder & Decoder Online – Convert Data Instantly

Encode Files or Decode Base64 Strings for Developers

FAQ

Why is Base64 encoding used in web development?

It converts binary files (images, fonts, attachments) into text that can be embedded directly into HTML, CSS, and JSON. It's widely used for data transmission, API communication, and creating data URLs.

Is Base64 secure for sensitive data?

No — Base64 is not encryption. It should only be used for safe, non-confidential assets. Sensitive data must use proper cryptography instead.

What types of data can be converted using Base64 encoding?

Base64 can encode text, JSON, HTML, images, PDFs, fonts, audio, and binary data, making it useful for embedding resources inside web pages, CSS files, or API payloads.

Does Base64 encoding affect file size and performance?

Yes — encoded content becomes around 33% larger. Use it only for small images like icons to avoid poor loading performance.