Base64 Encoder & Decoder
Encode text strings or raw image files to Base64 format, or decode Base64 strings back into plain text and downloadable image previews online.
Representing binary data as ASCII strings
Base64 encoding represents binary data in an ASCII string format by translating it into a radix-64 representation. The ToolsFusion Base64 Encoder & Decoder provides dual support for both standard text strings and image files (PNG, JPEG, WEBP, SVG, GIF).
Common use cases
- Data URI generation for web dev: embed small icons or logos directly inside CSS or HTML files (data:image/png;base64,...) to reduce HTTP requests.
- API payload encoding: transmit binary files or raw credentials safely over JSON/XML REST APIs without risk of character corruption.
- Security & obfuscation: safely transmit special characters, API tokens, or URL parameters across systems.
Image to Base64 & Base64 to image
Upload any standard image file to generate an instant Base64 Data URI string equipped with a one-click copy button. Conversely, paste any valid Base64 string to render a live image preview and download the reconstructed file directly to your device.
Frequently Asked Questions
Is Base64 encoding a form of encryption?
No. Base64 is an encoding scheme for data representation, not encryption. It provides zero security or data secrecy because anyone can easily decode a Base64 string using a public decoder tool.
Does Base64 encoding increase file size?
Yes. Base64 encoding increases data size by approximately 33% compared to original binary files because 3 binary bytes are represented using 4 ASCII characters.
Why embed Base64 images directly in CSS or HTML?
Embedding tiny images or SVGs as Base64 Data URIs eliminates additional DNS lookups and HTTP requests, improving initial page loading speeds for critical UI icons.