Tolerance Checker
Judge measurements against your input criteria and auto-generate reasons.
Supports manual entry and CSV paste, with downloadable CSV results.
Set Criteria
Select input mode, base unit, and criteria values, then confirm lower/upper limits.
Enter Measurements (Manual / CSV)
Add measurement points in manual mode, or run batch checks after CSV column mapping.
Review Results (OK/NG + Reason)
Check totals, OK/NG summary, reasons, and failed points. Export as CSV or TSV.
How To Use
- Set input mode (target+/-tol or upper/lower) and unit.
- Enter values manually or paste CSV, then set per-column units when needed.
- Click "Judge" to review results and export CSV/TSV if needed.
FAQ
What is the difference between target+/-tol and upper/lower?
target+/-tol calculates lower and upper limits from center value and tolerance. upper/lower directly uses your lower and upper values.
Can I set different units for each measurement column?
Yes. You can set mm or m per measurement column. Values are converted to the base unit before comparison.
What happens if there are blanks or text values?
That row is judged as NG_PARSE_ERROR and the affected points are shown in the reason.
Are boundary values treated as OK?
Yes by default. You can switch to strict inequality in settings.
Can I use row-specific criteria in CSV?
Yes, using advanced options to map criteria columns. Mixed criteria modes in a single CSV are not allowed.
Notes
- This tool only judges against the criteria you input. It does not infer standards automatically.
- Use fixed units per column. Mixed units by row are not supported.
- All data is processed in your browser and not saved on servers.