Free Base64 Encoder & Decoder
Convert plain text, images, and files to Base64 strings, or decode Base64 data back into its original text or binary file format instantly.
How to Encode & Decode Base64 Online
Select Mode
Choose between Text mode or File mode depending on your data format.
Encode or Decode
Click Encode to convert to Base64, or Decode to restore the original content.
Copy Output
Copy your encoded data URL or string directly into your source code or stylesheet.
100% Client-Side Privacy
Encoding and decoding happen in your browser using native UTF-8 Web APIs. No data is sent over the wire.
Full UTF-8 Unicode Support
Correctly handles non-Latin characters, international scripts, emojis, and special symbols without corruption.
Data URL Generation
Generate clean `data:image/png;base64,...` URLs for inlining assets directly in HTML and CSS stylesheets.
Zero Latency
Instant encoding without server uploads, perfect for rapid web development and debugging.
Frequently Asked Questions
Base64 is a binary-to-text encoding scheme used to represent binary data (like images or attachments) in ASCII string format so it can be safely transferred across text-based protocols like email (MIME) or embedded in JSON, HTML, and CSS.
No. Base64 is an encoding format, not an encryption method. Anyone can easily decode a Base64 string back to its original form. For security, use our PDF Password Protect tool.
Yes. You can upload images or files directly in the File tab to generate ready-to-use Data URLs.
Yes, Files Craft Base64 Converter is 100% free with no limits.