Base64 Encode / Decode Tool
Online Base64 encoding/decoding tool, supporting text, JSON, URL, file conversion, providing multiple options. All calculations are completed locally.
File Handling
Drag file here, or click to select file
Supports files up to 5MB
What is Base64 Encoding?
Base64 is an encoding method based on 64 printable characters to represent binary data. It is commonly used in scenarios where binary data needs to be transmitted or stored, converting data to text format. Base64 encoding is widely used in email, web pages, API interfaces, configuration files and other scenarios.
Main Features
- Text Encode/Decode: Supports converting any text (including Chinese, emoji, special characters) to Base64 format, or restoring Base64 to original text
- JSON Processing: Supports Base64 encoding/decoding of JSON data, with JSON syntax highlighting
- File Conversion: Supports drag-and-drop file upload, automatically converts to Base64 format, supports images, documents, PDFs and various file types
- URL Safe Base64: Supports URL Safe format, replacing + and / with - and _, suitable for use in URLs
- DataURL Format: Supports generating DataURL format (data:image/png;base64,...), can be directly used in HTML
- Auto Error Correction: Intelligently identifies and processes non-standard Base64 strings, automatically handles URL Safe format and missing padding
Use Cases
Base64 tool is suitable for various scenarios:
- API Development: Transmitting binary data or special characters in API interfaces
- Frontend Development: Embedding images or other resources into HTML/CSS
- Configuration Files: Storing binary data or special characters in configuration files
- Data Transmission: Transmitting binary data through channels that only support text
- Encoding Conversion: Performing encoding conversion when transmitting data between different systems
Technical Features
This tool is implemented purely on the frontend, all data is processed in the local browser and will not be uploaded to the server, ensuring your data security and privacy. Supports files up to 5MB, providing a smooth user experience. Supports dark mode for a better visual experience.
Notes
- All calculations in this tool are completed locally and will not upload any data to the server
- Supports UTF-8 encoding, can correctly handle Chinese, emoji and other Unicode characters
- File size limit is 5MB, files exceeding this size may not be processed normally
- URL Safe Base64 automatically removes padding =, will automatically complete when decoding