Number Base Converter

Convert integers among binary, decimal, hexadecimal, and octal. It is fast, free, and designed for everyday development work.

Browser workspace
Your result will appear here.

🔒Private by design. Nothing is uploaded—this tool runs entirely in your browser.

How to use this tool

  1. Paste or type the content you want to process in the input area.
  2. Add the second input or options shown for this tool, when required.
  3. Select “Convert number” to process everything locally in your browser.
  4. Check the result carefully, then use the copy button to save it.

How Number Base Converter works

Number bases are different written representations of the same integer. Binary uses digits 0–1, octal 0–7, decimal 0–9, and hexadecimal 0–9 plus A–F.

The converter interprets prefixes such as 0b, 0o, and 0x, turns the input into a numeric value, and renders that value in all four bases using browser number conversion methods.

This tool is intended for integers within JavaScript’s reliably representable range. Very large values, fractional values, signed bit widths, and two’s-complement interpretation require extra context and may need a dedicated big-integer workflow.

Frequently asked questions

What does Number Base Converter do?

Convert integers among binary, decimal, hexadecimal, and octal.

Is Number Base Converter free?

Yes. You can use the complete tool without an account, subscription, or usage limit.

Is my input uploaded anywhere?

No. The tool processes your input inside the current browser tab and does not send editor content to a Toolsvanta processing server.

Does it work on mobile?

Yes. The input, controls, and results adapt to smaller screens, although larger code or data samples are usually easier to inspect on desktop.

Can I use the result in a commercial project?

Yes. You may use the result in personal or commercial work. Always review and test important output before deploying it.

Does Toolsvanta save my work?

No. Input and results are not saved by the tool. Copy anything you want to keep before closing or refreshing the page.

Related convert & encode tools

B

Base64 Encoder / Decoder

Encode Unicode text or files to Base64 and decode it locally.

Open tool →U

URL Encoder / Decoder

Safely percent-encode or decode URL text.

Open tool →H

HTML Entity Encoder / Decoder

Convert reserved characters to and from HTML entities.

Open tool →J

JSON to CSV / CSV to JSON

Convert structured JSON arrays and CSV tables in either direction.

Open tool →