TL;DR — convert between binary, octal, decimal, hex, and ASCII in your browser
Paste text or numbers, pick From and To bases, tweak delimiter, grouping, padding, and HEX case, then copy the result. It is fast, private, and ideal for quick checks and byte‑level work.
Number Base Converter — quick, precise conversions for everyday dev work
This tool converts between binary, octal, decimal (base 10), hexadecimal, and Text (ASCII) in one place. It updates as you type, so you can see results immediately and adjust formatting until they match your target environment. Use it for byte‑level checks, quick lookups, and preparing data for debugging, docs, or teaching. Because all processing happens in your browser, your input stays private and never leaves your device.
Start by choosing the source and destination systems. You can paste values separated by spaces or commas, or enter a long run of bits and let the tool slice it into 8‑, 16‑, or 32‑bit chunks. Formatting controls make the output easier to scan: pick a delimiter (space, comma, or none), set a grouping size (for example, 4 for nibbles or 8 for bytes), enable byte padding, and choose uppercase or lowercase hex. A swap button flips direction instantly, and live stats show token count and input length so you can sanity‑check data.
Handy presets cover common tasks such as ASCII → Binary (8‑bit), ASCII → Hex, Hex → Binary,Binary → Base 10, and Octal → Decimal. If you are working with structured payloads after converting, you may like the JSON Formatter & Validator to tidy and validate data. For other encodings, try the Base64 Encoder / Decoder. Need unit math instead of number bases? The Unit Converter can help. For demo data and testing, use the Random Number Generator.
Tip for readability: use grouping of four when viewing binary or hex (nibbles) and eight when you are thinking in bytes. Padding makes columns line up, which is useful when comparing outputs from terminals or firmware logs.
Key features
- Base‑to‑base conversion: Binary ↔ Octal ↔ Decimal ↔ Hex, plus Text (ASCII)
- Presets for common tasks: ASCII → Binary (8‑bit), ASCII → Hex, Hex → Binary, Binary → Base 10, Octal → Decimal
- Binary chunk sizes: 8‑bit, 16‑bit, or 32‑bit
- Output formatting: delimiter, grouping size, byte padding, and HEX case
- Live validation with clear error messages for invalid tokens
- Fast and private — 100% client‑side (no uploads)
Tips
- Use grouping of 4 for nibbles and 8 for bytes to scan binary and hex at a glance.
- Enable padding for consistent two‑digit hex and eight‑bit binary output.
- If your binary is a single long string, set a bit length so the tool splits it into bytes or words.
- For structured cleanup after conversion, open the JSON Formatter.
Frequently asked questions
Does the base converter work offline and keep data private?
Can I convert binary to decimal and decimal to binary?
Does it support octal conversions?
How do I convert ASCII text to hex or binary?
You might also like
- Validate and format payloads with JSON Formatter & Validator.
- Encode or decode base64 with Base64 Encoder / Decoder.
- Convert measurements using Unit Converter.
- Generate test values in the Random Number Generator.