Binary to Decimal Conversion
Two-way conversion between binary and decimal
Features
Two-way binary ⇔ decimal conversion
Radix conversion in both directions is completed on one screen
Supports batch conversion of multiple values
Process them together using space, comma, or line-break delimiters
Accurately converts large numbers
Uses a method that computes even huge digit counts without error
Automatic full-width to half-width correction
Full-width digits like ０ and １ can be entered as is
How to Use
Select the conversion direction button
Specify the conversion direction with the "Binary → Decimal" and "Decimal → Binary" buttons
Enter the value to convert
Enter a number in the input field. You can also try it by clicking the sample value
Press the convert button to run
Pressing it shows the result in the output field. An error is shown if it contains characters that cannot be converted
Copy or save the result
Grab the result with the copy button, or save as text with the download button
Use Cases
Learning the basics of programming
When learning how binary works, instantly check your hand calculations
Verifying bit operation results
Convert flag and mask values to decimal to check a program's behavior
Calculating network settings
Convert IP addresses and subnet masks to binary notation to grasp them
Support for designing digital circuits
Radix-convert the input/output values of a logic circuit to streamline creating truth tables
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
radix conversion is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
conversion results and input suggestions are not stored on the server.
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