What does this tool support?

Bases 2–36 use digits 0–9 and letters A–Z. Enter one integer, optionally negative, without prefixes, separators or fractions. Up to 4,096 digits. No rounding.

Is my content saved or uploaded?

No. Only your non-sensitive settings are remembered. Input, output, image data and filenames stay out of storage and statistics.

What happens with a large result?

The displayed text is a limited preview above 200,000 characters. Download retains the complete result; copying is limited to 2 MB. A protective limit produces an error, never a silently shortened download.

Encoding tools

Number Base Converter

Convert exact integers between bases 2–36 without rounding.

Runs locally

Input

Output

Runs locally in your browser

Input: up to 4,096 digits. Bases 2–36. Files stay in your browser.

Guide

Convert an integer between number bases, such as decimal and hexadecimal. Select the base that the input uses before choosing the output base, since the same digits can represent different values.

Add your input
Type or paste into Input, choose an example or use Open file.
Choose the options
Use the controls above the fields. The question-mark buttons explain unfamiliar choices.
Read and keep the result
Output updates automatically. Copy output or Download keeps the result.

On mobile, choose Output to read the result. Clear removes both fields.

From base

From base: the number system used by your input. Choose 2–36; for example 2 for binary, 10 for decimal or 16 for hexadecimal.
Enter one whole number without prefixes such as 0x or 0b, separators or fractions. A leading minus sign is allowed.

To base

To base: the number system for the result. Choose 2–36; for example 255 in base 10 becomes FF in base 16.
Digits above 9 use letters A–Z. Conversion preserves the exact integer without rounding.

Input

Up to 4,096 digits. Use only digits valid for the chosen input base.

Shortcuts

Ctrl / Cmd + Enter — Run selected action
Ctrl / Cmd + Shift + C — Copy output
Ctrl / Cmd + S — Download output
? — Show shortcuts outside text fields

Shortcuts work while focus is in the workspace. Copy and download need valid output.

Common questions

What does this tool support?: Bases 2–36 use digits 0–9 and letters A–Z. Enter one integer, optionally negative, without prefixes, separators or fractions. Up to 4,096 digits. No rounding.
Is my content saved or uploaded?: No. Only your non-sensitive settings are remembered. Input, output, image data and filenames stay out of storage and statistics.
What happens with a large result?: The displayed text is a limited preview above 200,000 characters. Download retains the complete result; copying is limited to 2 MB. A protective limit produces an error, never a silently shortened download.

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