ExportCheck — repeatable CSV export checks

Short description: Match records by key instead of row order, map renamed fields, choose exact-text or plain-decimal rules, and review changed, new, missing or ambiguous records. Keep reusable rules and reports locally.

Included: browser comparison app and guide; batch runner with composite keys; CSV/HTML/JSON reports; saved-rule example; synthetic CSV fixtures; walkthrough; 29 automated checks.

Requirements: browser for the app; Node 22+ for the batch runner. Browser limit: 2 MB / 20,000 records per input, CSV/TSV. The runner has its own documented limits.

Limits: no XLSX, database connection or accounting certification. Duplicate and blank keys need review; numeric rules accept supported plain decimals, not guessed currency values. Local processing is also available in competing free tools. Reports can contain your input values; retain them appropriately.

Free browser preview: https://sunny-torrone-29332a.netlify.app/exportcheck/

Packaging release 0.1.1; original engine/content version 0.1.0. Built by Shruti. Usage rights and file/delivery contact guidance are included in LICENSE.txt. Checkout activation and customer delivery verification are seller-controlled.