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Number Base Converter Runs in your browser. No input data is sent to our server.

Paste a number, choose its base, and get the matching binary, octal, decimal, and hexadecimal values instantly. This page is useful for debugging, low-level programming, flags, bit masks, and protocol work.

Base conversion result

Paste content and run the tool instantly.

This tool runs entirely in your browser, so you can inspect, transform, or generate developer text without sending it to a remote processing service.

Convert Binary, Octal, Decimal, And Hex Online

Convert binary, octal, decimal, and hexadecimal values online with readable bit-length output.

How to use Number Base Converter

1

Paste content into the number input panel.

2

Adjust the available options, then run the tool.

3

Copy or download the result once it looks right.

Why this helps in real workflows

You need to check a hex value against its binary representation.

A bit mask or protocol field needs a fast base conversion.

You want to compare decimal and hexadecimal debugging values.

A low-level tool or log output uses the wrong base for quick inspection.

Which tool should you choose?

Number Base Converter: Choose this when you want to move between binary, octal, decimal, and hex quickly.

Byte / KB / MB / GB Converter: Choose the storage converter when the number represents bytes and capacity units.

Common problems and fixes

I have a hex or binary value and need the decimal form.

Choose the input base first and the tool will output all four common bases.

I want to understand how many bits a value actually uses.

Check the bit-length line and the grouped binary output.

I do not trust manual base conversion under time pressure.

Paste the value directly and let the browser calculate each representation for you.

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Frequently asked questions

Which bases does this converter support?

It supports binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) input and output.

Does it show bit length too?

Yes. The result includes the bit length of the absolute binary value — useful for confirming that a value fits within an 8-bit, 16-bit, or 32-bit field.

Why do some systems use hex instead of decimal?

Hexadecimal is compact and maps cleanly to binary — each hex digit represents exactly 4 bits. Memory addresses, color codes, and protocol fields are often shown in hex because it's more readable than long binary strings.

Can I convert a hex value like 0xFF?

Yes. Select hex as the input base and paste the value with or without the 0x prefix. The converter handles both.

What is a bit mask and how does this help?

A bit mask is a value used to isolate or set specific bits in a binary number. Seeing the binary and hex representations side by side makes it easier to read and verify masks for flags, permissions, and protocol fields.

Is this number base converter free?

Yes. It is free to use in your browser.