Number Base Converter for Mac
A native Mac number base converter. Enter a value in binary, octal, decimal, or hex and see all four representations at once. No calculator app detour required.
What it does
Bench's Number Base tool converts integers between base 2 (binary), base 8 (octal), base 10 (decimal), and base 16 (hexadecimal). Type or paste a number in any field — the other three update in real time. The hex output uses both uppercase and lowercase variants, which matters when matching color values or protocol constants. There are no arbitrary-precision limits for typical developer inputs; standard 64-bit integer range is fully covered.
Why use Bench's number base converter
File permissions, bitmask flags, memory addresses, color channel values, and network protocol constants all switch bases constantly. Doing the conversion in your head is feasible for small numbers, but anything above a byte or two is tedious. Bench gives you a persistent window you can paste into at any point in your workflow — no browser, no manual arithmetic, no risk of a copy-paste error introducing a subtle off-by-one.
- Native Mac app. SwiftUI, single window, instant launch.
- Offline. No network calls. Whatever you paste stays on your Mac.
- No tracking. No analytics, no telemetry, no third-party SDKs.
- One-time purchase. $19 once, year of updates included, $9 optional renewal — no subscription.
Paste it. Bench picks the tool.
Smart Detection reads your clipboard locally and routes you to the Number Base converter when it sees something like:
0xFF3A1C
The detection runs entirely on your Mac as a rule-based heuristic — it checks for hex
prefixes (0x), binary prefixes (0b), and numeric patterns.
Nothing is uploaded.
Related tools in Bench
Number Base ships inside Bench, alongside 17 other developer tools. $19 one-time, year of updates included.
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