Number Base Converter
Convert numbers between binary, octal, decimal, and hex.
Low-level programming, debugging, networking, and computer science coursework constantly require converting numbers between binary, octal, decimal, and hexadecimal representations. Utilitoo's Number Base Converter handles these conversions instantly so you can verify bit patterns, decode color values, or check memory addresses without mental math.
Embedded developers converting register values, security researchers reading hex dumps, students studying number systems, and web developers translating color codes all reach for a reliable base converter daily.
Enter a number, select source and target bases, and click Convert. Signed integers are supported. Pair with Text to Binary for character-level encoding, Base64 Encode/Decode for transport encoding, or Timestamp Converter when working with Unix epoch values in hex.
All conversion runs locally in your browser on Utilitoo. Your input is never uploaded or stored. Free, instant, and privacy-first for developers, students, and engineers working with numeric representations.
Number Base Converter is built for the inspect-edit-copy loop developers repeat dozens of times per day. Because Utilitoo runs in the browser, you avoid context switching to desktop utilities while reviewing logs, configs, or API responses. When output feeds into production systems, validate on a staging copy first.
Common use cases
- Convert numbers between binary, octal, decimal, and hex - a common daily workflow on Utilitoo.
- Preparing number base converter results to paste into pull requests, tickets, or team chat.
- Validating number base converter data from a third-party API before wiring it into your application.
- Teaching or documenting number base converter workflows without installing desktop software.
- Cross-checking Number Base Converter output against a colleague's result during pair debugging or code review.
Tips & common mistakes
Number Base Converter runs entirely in your browser on Utilitoo, so you can paste sensitive API payloads, configs, or logs without uploading them. Start with a small sample to confirm the output format, then process the full input. If results look wrong, check for trailing commas, wrong encoding, or mixed line endings - common issues when copying from terminals or log viewers. Keep Number Base Converter in a pinned tab during active development - it is faster than CLI one-offs for quick transforms. Use the Related Tools section to chain utilities without returning to the homepage.
Common errors
- Unexpected output from Number Base Converter - double-check input format, character encoding, and whether the source data was truncated when pasted.
- Browser limits - very large inputs may slow or freeze the tab; split the data into smaller chunks if performance degrades.
How to use
- Enter a number.
- Choose source and target bases.
- Click Convert.
Frequently Asked Questions
How do I convert hex to decimal online?▼
Enter your hex value, select Hex as the source base and Decimal as the target, then click Convert in Utilitoo.
Which number bases are supported?▼
Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).
Are negative numbers supported?▼
Yes. Prefix negative values with a minus sign and Utilitoo converts the signed integer correctly.
Can I convert fractional numbers?▼
This tool converts whole integers only. Use a calculator for fractional base conversions.
Is conversion done locally?▼
Yes. All number base conversion runs in your browser on Utilitoo.
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