Decimal to Base36 Converter

Summary

Convert any decimal integer to base-36 (digits 0-9 and letters A-Z) instantly in your browser.

How it works

1. Enter a decimal (base-10) integer in the input field.
2. The tool repeatedly divides the number by 36, mapping remainders to 0-9 or A-Z.
3. The remainders are collected in reverse order to form the base-36 string.
4. For reverse conversion, enter a base-36 string to get back the decimal value.
5. Copy the result with the Copy button.

Use cases

• Generate short alphanumeric tokens from sequential numeric IDs.
• Encode large integers compactly for URLs and QR codes.
• Understand positional numeral systems beyond base-10 and base-16.
• Convert Unix timestamps to compact base-36 strings for unique keys.
• Reverse-decode a base-36 identifier back to its original numeric value.
• Educational demonstration of radix conversion algorithms.

Frequently Asked Questions