Number Base Converter
Convert integers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). All fields update simultaneously.
Number Base Converter
Type a number in any base — all others update instantly.
Binary
Base 2 0b…
Octal
Base 8 0o…
Decimal
Base 10
Hexadecimal
Base 16 0x…
Number bases explained
Binary (base 2) uses digits 0–1. Octal (base 8) uses 0–7. Decimal (base 10) is the everyday number system. Hexadecimal (base 16) uses 0–9 and A–F and is widely used in computing for memory addresses and colour codes.
Why use Number Base online?
Number Base in the browser saves context switching: no CLI install, no fragile one-liners, and instant feedback for teammates who do not live in the terminal. It is ideal for debugging, demos, and quick checks during code review.
Tips for best results
Work with a sample payload first, then paste production data. Keep privacy in mind: prefer local browser processing for secrets, tokens, and customer data. Bookmark this page for faster access next time.
How to use
- Type a number in any field — binary, octal, decimal, or hexadecimal.
- All other fields update instantly.
- Copy any result using the Copy button.
- Review the output and use Copy to paste into your editor, ticket, or chat.
- Need another utility? Scroll to Related Tools below for Number Base companions on skybin.io.
- For a deeper walkthrough, read the linked Skybin blog article at the bottom of this page.
Online tool vs terminal
| Terminal / CLI | This tool |
|---|---|
| Install CLI tools or write a one-off script | Open the tool in your browser — no install |
| Look up flags in man pages or Stack Overflow | Paste input or upload files where supported |
| Repeat for each file format or edge case | Get instant visual feedback and copy buttons |
All conversion runs in your browser — nothing is sent to any server.
Frequently Asked Questions
- Does it handle negative numbers?
- No — only non-negative integers are supported.
- What is the maximum value?
- The converter uses JavaScript's BigInt for arbitrary precision, so very large numbers are supported.
- Is this tool free to use?
- Yes. All Skybin developer tools are free with no account, API key, or usage limits.
- Does my data get sent to a server?
- No. Processing runs in your browser whenever possible. Sensitive input never leaves your device unless a tool explicitly fetches a URL you provide (e.g. OG Validator).
- Can I use this on mobile?
- Yes. The tools work in modern mobile browsers, though a desktop screen is easier for large JSON or PDF workflows.
- How is this different from desktop apps?
- There is nothing to install or update. Open a bookmarked URL and start working — ideal for quick tasks during development or support calls.
- Are there keyboard shortcuts?
- Most tools support standard paste (Ctrl+V / Cmd+V) and select-all in text areas. Copy buttons provide one-click output.
- Does Skybin store my history?
- No. We do not log tool inputs or outputs. Refreshing the page clears in-memory state unless the tool encodes state in the URL.