Hex to Decimal Converter – Free Online Bulk Conversion Tool
About This Hex to Decimal Converter
Hexadecimal is a base-16 number system that programmers use as a compact way to represent binary data, and it shows up everywhere from color codes to memory addresses to error codes. This tool converts hex values into decimal numbers, or decimal numbers back into hex, and it handles multiple values at once rather than making you convert one at a time.
The BigToolSite Team tested this converter against a range of values, including very large numbers and negative integers, to confirm the output stays accurate across the full range of inputs.
You can paste in a whole list of values, one per line, and get every result back at once. Options include choosing uppercase or lowercase hex output, adding a “0x” prefix, and treating values as signed integers using two’s complement, which matters when working with data that represents negative numbers in binary systems.
If you’re converting values that will end up displayed as a color, our color converter handles hex-to-RGB and other color format conversions directly. For a look at the raw binary representation behind these same values, the text to binary converter breaks numbers down into their 0s and 1s.
How to Use the Hex to Decimal Converter
- Choose “Hex to Decimal” or “Decimal to Hex” depending on the direction you need.
- Paste your values into the input box, one per line for bulk conversion.
- Select uppercase or lowercase for hex output.
- Check “Add ‘0x’ prefix” if you want the standard hex notation in the output.
- Check “Treat as Signed Integer” if your values represent negative numbers in two’s complement form.
- Click “Convert” to see the results, then copy or download the output as a .txt file.
Example Usage
Enter FF with “Hex to Decimal” selected, and the tool returns 255. Enter 255 with “Decimal to Hex” selected and the “0x prefix” option checked, and it returns 0xff. For bulk conversion, paste a list like 1A, 2B, 3C on separate lines, and the tool converts all three at once, flagging any line that isn’t a valid hex value.
Yes, it’s completely free with no signup required and no limits on how many values you can convert.
Yes. Paste one value per line into the input box and the tool converts all of them in a single pass, showing which lines succeeded and which had errors.
It means the hex value is interpreted using two’s complement, a system computers use to represent negative numbers in binary. This is important when working with data from programming contexts where values can be negative.
No. The tool accepts hex values with or without the “0x” prefix, so you can paste values in either format.
No. Your input is processed to generate the output and is not saved or logged.
