Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any base from 2 to 36. Auto-detects prefixes like 0b, 0o, 0x.
ℹ️ About Number Base Converter
The Number Base Converter lets you convert between formats instantly, free of charge, with everything running in your browser. Convert numbers between binary, octal, decimal, hexadecimal, and any base from 2 to 36. Auto-detects prefixes like 0b, 0o, 0x. No account, no upload to a server, no data retention. Drop in your input and get the converted output in seconds. The Number Base Converter is designed to preserve as much of the original information as possible while producing a clean, correct output in the target format. It works on desktop and mobile, handles large inputs gracefully, and never adds watermarks to the converted result.
💡 Use Cases
💎 Pro Tips
- Verify the output format meets your needs before sharing — the Number Base Converter uses sensible defaults, but some use cases require specific encodings or precision.
- For batch work, process files one by one and save each output to a dedicated folder on your device.
- If your input is unusually large, close other browser tabs first — memory-hungry conversions run faster with more available RAM.
- The Number Base Converter never alters your source file. Always keep an untouched backup in case you need to re-convert with different settings.
- Pair the Number Base Converter with other converters on this site to build multi-step workflows (e.g., CSV → JSON → formatted output).
❓ Frequently Asked Questions
Yes, 100% free with no ads on the output, no registration, and no hidden limits.
No. The Number Base Converter processes your input entirely in the browser — your data never leaves your device.
There is no hard cap, but very large inputs may be slow on low-memory devices. We recommend splitting files over 50 MB.
The Number Base Converter preserves as much as possible. When the source and target formats have different capabilities (e.g., one supports richer structure than the other), minor representational differences may occur, but the tool keeps the loss visible and predictable.
Yes. The converted output is yours to use in any personal or commercial context.
Yes, the interface is fully responsive and works on all modern mobile browsers.