Overview
Introduction
Generating a run of consecutive hex values by hand, 0x1 through 0x20 for a test fixture, or a padded range of IDs for a mock dataset, is exactly the kind of repetitive task worth automating once and reusing.
This tool generates a sequence of consecutive hex values starting from a value you choose, either up to a specific end value or for a specific count, with your choice of separator and optional zero-padding.
What Is Hex Sequence Generator?
The Hex Sequence Generator produces an arithmetic progression of hex values with a common difference of exactly 1, starting from the value you enter.
Two modes control how the sequence ends: "End value" mode runs through a specific hex value you name (inclusive), while "Count" mode instead runs for a specific number of values regardless of what the resulting end value happens to be.
How Hex Sequence Generator Works
In "End value" mode, the tool computes how many values fall between start and end (inclusive) using BigInt arithmetic; in "Count" mode, it uses your specified count directly, both are capped at 100,000 values as a safety limit.
Each value in the sequence is generated by adding successive whole numbers to the start value, optionally left-padded to your chosen digit width, then joined together with your chosen separator string.
When To Use Hex Sequence Generator
Use this whenever you need a ready-made run of consecutive hex values, generating test fixtures, mock IDs, or a reference table of values for documentation.
If you instead need to add a fixed amount to a specific existing list of values (rather than generate a fresh consecutive run), Hex Value Incrementer is the better fit.
Often used alongside Hex Value Incrementer, Hex Value Padder and Hex Number Splitter.
Features
Advantages
- Two flexible modes (end value or count) cover both "I know where I want to stop" and "I know how many I need" use cases.
- Optional padding lets every generated value share a consistent digit width without a separate pass through Hex Value Padder.
- A hard 100,000-value safety cap prevents a mistyped huge range from freezing the page.
Limitations
- Only generates sequences with a step of exactly 1; there's no option for a custom step size between consecutive values.
- Capped at 100,000 generated values per run; extremely large ranges need to be split into multiple smaller runs.
Examples
Best Practices & Notes
Best Practices
- Use "Count" mode when you know exactly how many values you need but don't want to calculate the end value by hand.
- Set a pad width at least as large as your longest expected value in the sequence to keep every entry visually aligned.
Developer Notes
In "End value" mode, the count is computed as `endValue - startValue + 1n` using BigInt; in "Count" mode the count is parsed directly as a decimal string; both are checked against a 100,000-value ceiling before the generation loop runs, and each value is produced with `(startValue + i).toString(16).toUpperCase()`, optionally `.padStart()`.
Hex Sequence Generator Use Cases
- Generating a quick reference table of consecutive hex values for documentation or teaching
- Producing mock IDs or test fixture data that needs to be sequential
- Building a padded, delimiter-separated list for pasting into another tool or format
Common Mistakes
- Forgetting "End value" mode's end is inclusive; a start of 1 and end of 5 produces five values (1 through 5), not four.
- Requesting a range or count large enough to exceed the 100,000-value safety cap and being surprised by the resulting error.
Tips
- Set the separator to a literal newline character if you want one generated value per output line instead of a delimited single line.
- Combine start values with a hex prefix removed beforehand; the start/end fields accept an optional 0x prefix and strip it automatically.