Number System Converter

It is a tool that reads a value written in one base and rewrites it in others. This unified version parses your input, works out the underlying integer, then re-encodes it into binary, decimal, hexadecimal, and octal at the same time. You type once and read all four representations of the same number in one view.

It handles four: binary (base 2, digits 0 and 1), decimal (base 10, digits 0 to 9), hexadecimal (base 16, digits 0 to 9 and letters A to F), and octal (base 8, digits 0 to 7). Each field only accepts the digits valid for its base, so mixing an invalid character into a field is blocked.

When you edit one field, the tool parses that text against its base to get a single integer value. It then re-encodes that integer into the other three bases and writes each result into its field. This runs on every keystroke in your browser, so all four fields reflect the same number as you type.

No. Every conversion runs in your browser with client-side JavaScript. The digits you type are parsed and re-encoded locally, and no request carries your input to any server. Because the work happens on your machine, values you enter stay on your machine for the whole session.

Both parse the input to an integer and re-encode it. The unified tool writes that integer into all four base fields and keeps them linked as you type. A dedicated converter, such as hex to decimal , shows one fixed source field and one result field. Pick the unified grid to compare bases, and a single-direction tool when the path is set.

Each field validates against its base before accepting a keystroke. Binary refuses anything except 0 and 1. Octal blocks 8 and 9. Hex allows 0 to 9 and A to F but nothing else. This keeps the four fields consistent, since a digit that has no meaning in one base cannot be converted into the others.

The tool works with whole numbers. It parses your input as an integer in the chosen base, then re-encodes that integer into the other bases. Fractional parts after a decimal point are not part of this workflow, since base conversion of fractions follows different rules and would change how each field is read.

Each of the four fields has a copy button beside it. Click it and the current value in that field is placed on your clipboard. Because the fields stay synced, you can type a decimal number, then copy the matching hex or binary result without retyping or converting anything by hand.

Each base has a fixed color so you can tell the fields apart without reading labels. Blue marks Binary, Red marks Decimal, Cyan marks Hexadecimal, and Yellow marks Octal. Since the fields update together, the colors help you track which value belongs to which base while you scan the grid.

Yes. On wider screens the four fields sit in a 2x2 grid. On narrow screens the layout switches to a single stacked column so each field gets full width. The conversion logic is the same on any device, since it runs in the browser regardless of screen size.

Use one when the source and target bases never change, for example turning decimal to binary repeatedly. These pages show one input and one result, so there is less on screen. The math matches the unified tool, but the focused layout keeps your attention on a single conversion path.

The tool parses and re-encodes standard integer values in the browser. Very large numbers beyond common integer range can lose precision, since the conversion relies on browser number handling. For everyday values like color codes, permission bits, byte counts, and addresses, the results stay accurate across all four bases.