A SMALL ENGINEERING TOOLBOX

Useful things.
Less busywork.

A set of lightweight tools inspired by the day-to-day work of checking data, APIs, and product behavior.

01 / DATA QUALITY

Data Quality Checker

Scan a CSV for common issues: missing values, duplicate IDs, invalid dates, and negative amounts.

CSV AUDIT

↑Choose a CSV fileor drop a file here · CSV only

No file selected

ID column Date column Amount column

02 / CHANGE REVIEW

Compare two CSV exports. See changed columns, added or removed rows, and records whose values differ.

FILE COMPARISONKEYED ROW MATCH

ABaseline CSVChoose first file BUpdated CSVChoose second file

Match rows using

03 / API QUALITY

Format JSON payloads and compare an expected response with an actual one, with differences reported by path.

EXPECTED VS ACTUALJSON

EXPECTED RESPONSE ACTUAL RESPONSE

04 / QUALITY ENGINEERING

Describe a field and its constraints to create a quick, reusable checklist of useful test cases.

FIELD SPECIFICATIONTEST DESIGN

Field name Field type Minimum Maximum Required field