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Base64 Encoder & Decoder – Convert Online Free
TrendingEncode or decode text, images, and files to Base64 format instantly. Free Base64 converter with file upload, data URI generation, and client-side processing.
Base64 Encoder / Decoder
Encode text or files to Base64, decode Base64 back to text
Encoded Base64 will appear here
Type or paste text above to begin
Common uses
- Embed images or fonts directly in HTML/CSS as data URIs
- Encode binary data for safe transport in JSON or URL parameters
- Store credentials or tokens in config files
- Decode JWT payloads and API responses for debugging
What is Base64 Encoder & Decoder?
Encode and decode Base64 for text, images, and files. Used for embedding images in HTML/CSS (data URIs), sending binary data over text protocols, and encoding API payloads. Features file upload, drag-and-drop, and automatic format detection. All processing is client-side for security.
base64encoderdecoderbinaryconversiondata uri
Base64 Encoder & Decoder Features
Secure & Private
All processing in browser – no uploads
File Support
Encode images and files with drag-and-drop
Data URI
Automatic data URI format for HTML/CSS
Base64 Encoder & Decoder FAQ
Binary-to-text encoding converting binary data into ASCII text using 64 printable characters. Used for transmitting binary data over text-based protocols.
Yes, by approximately 33% (4/3 ratio). A 100KB image becomes ~133KB when encoded.
Yes. All encoding/decoding happens in your browser. Files never leave your device or get uploaded to servers.