Base64 to Decimal Converter
Decode Base64-encoded strings and convert to decimal (ASCII code) representation. See the numeric value of each byte in the decoded data. Perfect for debugging, analysis, and education. All processing happens in your browser.
Recommended Settings
For Analysis
- •See ASCII codes for each character
- •Perfect for character encoding debugging
- •Understand numeric representation
For Security
- •All conversion happens in your browser
- •No data sent to external servers
- •Safe for sensitive data analysis
Pro Tips
- •Each number is the ASCII code (0-255)
- •Spaces separate byte values for clarity
- •Great for learning character encoding
Most Popular
Most users analyze ASCII codes and debug character encoding
When to Use This Tool
Convert Base64-encoded data to decimal ASCII codes for character-by-character analysis. Perfect for understanding text encoding, debugging character sets, or analyzing protocol data.
Recommended: Development
Inspect the numeric values of Base64-encoded bytes for debugging purposes. Useful when working with protocols, file formats, or data structures where you need to see exact byte values.
Recommended: Debugging
Learn how characters are represented numerically in computer systems. Great for teaching ASCII, character encoding, and understanding how text is stored and transmitted digitally.
Recommended: Education
How It Works
Paste your Base64-encoded string
Tool decodes to raw bytes
Converts each byte to decimal ASCII code
Displays space-separated decimal values
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Powered by Client-side JavaScript for optimal performance on modern browsers.
Open Source
Built with verified, open-source libraries. Fully transparent.
Frequently Asked Questions
What does this tool do?
This tool decodes Base64-encoded strings and converts each decoded byte into its decimal representation (ASCII code). Each character is shown as a decimal number (0-255), separated by spaces for readability.
What are these decimal numbers?
Each decimal number represents the ASCII code (character code) of a character in the decoded string. For example, 'A' is 65, 'a' is 97, and space is 32. These are the numeric values computers use to represent characters.
How is this different from hexadecimal?
Decimal uses base-10 numbers (0-9), which are more human-readable for general purposes. Hexadecimal uses base-16 (0-9, A-F), which is more compact. Both represent the same byte values, just in different number systems.
Is my data safe?
Absolutely! All decoding and conversion happens entirely in your browser using client-side JavaScript. No data is ever sent to any server, ensuring complete privacy and security.
Can I use this for binary data?
Yes! This tool shows the decimal value of each byte, whether it's text or binary data. Each byte (0-255) is shown as its decimal equivalent, making it useful for analyzing any type of Base64-encoded content.