How It Works Under the Hood
Converts UTF-8 character byte streams into standard RFC 4648 Base64, percent-encoded URI strings, hexadecimal bytes, or HTML entity representations entirely on the client side.
Step-by-Step Instructions
Select your format: Base64, URL Percent, Hexadecimal, or HTML Entities.
Paste your text or let Auto-Detect identify the input format.
Toggle Encode or Decode, or use the Swap button to reverse direction.
Upload local images or SVGs to generate Base64 Data URIs with 1-click copy.
Key Features & Performance
- Smart Format Auto-Detect: Identifies Base64, URL, and Hex strings automatically
- URL-Safe Base64: Replaces + and / with - and _ for URL parameter safety
- File to Base64 URI: Drag-and-drop images to get instant data:image URIs
- UTF-8 Safe: Handles special characters, emojis, and international alphabets accurately
Local Browser Processing & Privacy
Traditional web converters upload your documents, snippets, or media files to remote servers. Base64, URL & Hex Multi-Format Encoder/Decoder runs inside your browser tab:
Your input text and files are processed locally without uploading payloads to a processing server.
Microdeck does not log or store the files or inputs you paste into tool workspaces (normal static hosting/CDN requests still load page assets).
Working outputs stay in your browser tab and are released when you reset the tool or close the tab.
Frequently Asked Questions
What is the difference between standard Base64 and URL-Safe Base64?
Standard Base64 contains "+" and "/" characters, which have special meanings in URLs (like query string delimiters). URL-Safe Base64 replaces "+" with "-" and "/" with "_", and omits padding "=".
Does this tool support emojis and non-English characters?
Yes! Microdeck uses TextEncoder and TextDecoder to handle all UTF-8 characters and multi-byte emojis properly without broken character corruption.
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