Base64 is an encoding scheme that converts binary data into ASCII strings, commonly used to transmit data in text-based protocols such as email, JSON, and URLs.

• 📦 Standard Base64 uses the character set A-Z a-z 0-9 + / and uses = for padding.
• 🔐 URL-safe variant: replaces + with - and / with _, and typically removes padding = to avoid URL encoding issues.
• 🌐 This tool supports Unicode characters (e.g., Chinese) and internally processes them via UTF-8 encoding.
• 🖼️ Image parsing: In the Image tab, paste Base64 image data (may include the data:image prefix) and click Parse to preview and display image information. Supports automatic detection of common image formats (PNG, JPEG, GIF, BMP, WebP, SVG).
• ⚠️ If the input is not valid Base64 during decoding, an error message will be displayed in the output box.
• 💡 Example: Hello 世界 encodes to SGVsbG8g5LiW55WM (URL-safe: SGVsbG8g5LiW55WM, without padding).