Binary Calculator

How to use Binary Calculator

1. Open Binary Calculator — it runs entirely in your browser with no setup.
2. Paste or type your input into the text area, or upload a file where supported.
3. Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server.
4. Review the output instantly; large inputs are handled locally without lag.
5. Copy the result to your clipboard or download it. Your data never leaves the page.

Why use Binary Calculator?

• 100% free with no limits, no sign-up and no watermarks.
• Private by design — your data are processed in your browser and never uploaded to a server.
• Fast and lightweight, with instant results even on a phone or a slow connection.
• Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
• Part of a full programming suite, so related binary tasks are one click away.

What people use Binary Calculator for

• Performing arithmetic or bitwise operations directly in binary.
• Checking a bitmask or flag calculation.
• Working through a computer-architecture exercise.

Binary Calculator: limits and things worth knowing

• Bitwise AND, OR, XOR and NOT operate on each bit position independently, which is what makes them useful for flags and masks.
• Left-shifting by n multiplies by 2^n and right-shifting divides, which is why shifts appear in optimised arithmetic.
• Signed right shift preserves the sign bit while unsigned shift does not — JavaScript's >> and >>> differ for exactly this reason.
• Fixed-width arithmetic overflows silently by wrapping. Adding 1 to the maximum signed 32-bit integer gives the minimum negative one.

Is it private and secure?

Your privacy is built in. Binary Calculator runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

Learn more

Why Browser-Based Tools Are Safer for Your Files — Most online converters upload your files to a server. Client-side tools don't. Here's why that difference matters for privacy.