Number Base Converter Online Free — Binary, Decimal, Hex & Octal
Convert between binary, decimal, hexadecimal, and octal instantly.
Last Updated: August 30, 2026
You May Also Like
Lorem Ipsum
Generate placeholder text
Open ToolSlug Generator
Create SEO-friendly URL slugs
Open ToolJSON Formatter
Format, validate and minify JSON
Open ToolBase64 Encoder
Encode and decode Base64
Open ToolURL Encoder
Encode and decode URL strings
Open ToolUUID Generator
Generate UUID v4 identifiers
Open ToolHash Generator
Generate SHA-1/256/384/512 hashes
Open ToolUnix Timestamp
Convert timestamps to dates
Open ToolHow to Use Toolza’s Free Number Base Converter
Follow these simple steps to get your result in seconds.
Enter a Number
Type the number you want to convert.
Select Input Base
Choose binary, decimal, hex, or octal.
Convert
See the number in all four bases instantly.
Why Use Toolza’s Free Tool?
Browser-based, private, and completely free — no catches.
100% Private & Secure
Your files never leave your device. All processing happens locally in your browser — no uploads, no servers, no data storage.
Completely Free
No hidden charges, no premium plans, no watermarks. Every feature is free forever.
Works on Any Device
No installation needed. Works on desktop, tablet, and mobile browsers.
No Signup Required
Start using the tool immediately. No accounts, no emails, no personal data.
High Quality Output
Results preserve original quality and formatting.
Lightning Fast
Everything runs locally, so results are instant even for large files.
Convert Between Number Bases
Programmers and students frequently need to convert between number systems. Enter a number in any base and see all four representations instantly.
Bases explained
- Binary (2): 0s and 1s — used by computers.
- Octal (8): Digits 0-7 — compact binary representation.
- Decimal (10): Standard base-10 numbers.
- Hexadecimal (16): 0-9 and A-F — compact binary, used in CSS colors and memory addresses.
Frequently Asked Questions
Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16).
Yes. Completely free with no limits.
No. All calculations run locally in your browser.
Explore All Free Tools
Discover all free online PDF, Image, Text, Data, QR, and Developer tools on Toolza.