When the Hex Dump Viewer seems to misbehave, the cause is usually one of two things: something stopped the tool from running, or it ran but the result is not usable. This guide starts with the fastest checks, then walks through the common problems and exact fixes.
Quick Checks First
- Refresh the page - a stalled session is the most common cause of nothing happening.
- Confirm the input is not empty and actually contains what you meant to submit.
- Try the smallest possible input; if that works, the issue is size, not the tool.
- Turn off browser extensions that block scripts, then reload and test again.
- Update or switch browsers if the problem repeats across sessions.
Common Problems and How to Fix Them
The first row looks like it has extra values.
The leading offset is position information rather than data, so start counting from the first byte pair after it.
My ASCII column is out of step.
A missing or merged byte shifts the text, so compare the number of pairs with the row length setting.
Dots fill half of my ASCII column.
Dots mark bytes without a printable ASCII character, such as control codes, and the hex values are still shown.
Offsets jump unexpectedly between rows.
Each row advances by the number of bytes per line, so a jump means some bytes in the previous line were dropped.
The viewer rejects my dump.
Strip header lines, addresses that are not offsets, and any characters outside hex digits and spaces.
My rows are wider than the window.
Lower the bytes per line so each row fits, or widen the view to keep the columns aligned.
When It Works but the Output Is Poor
If the tool runs fine but the result misses, the problem is almost always the brief, not the software:
- Counting the offset as data
- Expecting every line to hold the same byte count
- Reading dots as lost bytes
- Pasting dumps with header labels
How to Stop It Happening Next Time
- Keep a saved prompt template for every task you repeat.
- Change one setting per generation so causes stay obvious.
- Run a two-minute sanity test with known input after any update.
- Note every failure and its fix; a short troubleshooting log pays for itself.
Still Stuck?
Reproduce the problem with the smallest possible input and note the exact steps that triggered it. A one-line description of what you did, what you expected and what happened is enough to get a precise answer from support or a colleague.
Frequently Asked Questions
How many bytes appear per line?
Rows hold a fixed group of bytes so the offset and ASCII columns line up on every line.
What does the offset show?
It is the position of the first byte of that row, counted from the start of the dumped data.
What do the dots in the ASCII column mean?
A dot stands for a byte with no printable ASCII character, such as a control code.
Is my data stored?
No - the viewer works in your browser and nothing is saved.
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