Decimal to Base64 Converter
Encode Bytes or Big Integers into Base64 strings.
About the Decimal to Base64 Converter
This tool is designed to convert decimal numbers back into Base64 encoded strings. While most Base64 tools work with text, this one specializes in numerical data, allowing you to encode raw byte arrays or massive integers.
It supports two primary modes: Byte Array, where you input a list of numbers between 0 and 255 (representing raw file data or buffers), and Big Integer, where you can input a single, potentially huge number, which is then converted to its binary representation and encoded.
How to Use the Tool
- Select your "Input Format" mode (Byte Array or Big Integer).
- Paste your decimal numbers into the "Input Decimal" box.
- If using Byte Array mode, separate your numbers with spaces, commas, or newlines (e.g., `72 101 108`).
- The encoded Base64 string will appear instantly in the right panel.
- Use the copy or download buttons to save your result.
Frequently Asked Questions
What is the "Byte Array" mode?
This mode expects a list of numbers where each number represents a single byte (0-255). This is commonly used when inspecting file headers, network packets, or character codes (ASCII/UTF-8) that need to be re-encoded to Base64.
How does "Big Integer" mode work?
Big Integer mode takes one single, large number (which can be larger than standard 64-bit integers). It converts this number into a hexadecimal string, then into binary bytes, and finally encodes those bytes into Base64. This is often used in cryptography and blockchain applications.
Can I copy data from the "Base64 to Decimal" tool?
Yes! These two tools are perfectly reversible. You can decode a Base64 string to decimals using our other tool, modify the numbers, and then use this tool to encode them back to Base64.
Is the conversion secure?
Absolutely. The conversion happens entirely within your web browser using JavaScript. Your data is never sent to our servers, ensuring complete privacy for your sensitive data.