Phase 1 · Local Rules · Client-Only

Trusted Data. Simplified.

Apply enterprise-ready rules or custom checks to any CSV, XLSX, or JSON. Find errors fast and fix them before they spread.

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Schema-aware & cross-field rules
Declarative JSON + TS snippets
Optimized for CSV / XLSX (JSON too)
Deterministic, scored, auditable

orders.csv

orderId,email,amount,currency,startDate,endDate,country
1,ada@example.com,120.50,USD,2025-10-01,2025-10-03,US
2,grace@example.com,999999.99,USD,2025-10-02,2025-10-04,CA
3,wrong@,12,USD,2025-10-05,2025-10-01,GB

Source

Upload CSV/XLSX/JSON or start blank

Auto-detect headers, sample rows, and inferred types. Keep data local in Phase 1.

Open Demo

Rules

Assign validations per column

Use RuleAdder to add required, type, length, range, enum, regex, date order and more. Edit options inline; bulk-apply “required.”

See Rule Builder

Run & Report

Validate, profile, and export issues

KPIs, profiling table, and downloadable CSV of issues—matching the demo experience.

Try Validation

Validation Packs

Mix and match enterprise-ready checks. Extend with custom TS snippets.

Identity & Contact

Email pattern+MX, E.164 phone, name heuristics, DOB range, UUID/ULID, username policy.

Address & Geo

Postal formats, ISO-3166, state/region coherence, lat/lon bounds, distance rules.

Finance

Luhn (NPI, IBAN, CC, CUSIP), IBAN, SWIFT/BIC shape, ISO-4217 currency, precision/scale, tax ID lengths.

Data Quality

Required/nullable, enum, regex, min/max, ISO-8601 dates, uniqueness, referential checks.

Cross-Field Logic

“If A then B”, conditional ranges, temporal ordering, dependency graphs.

External Sources

Phase 2: HTTP/SQL/Snowflake/CSV refs with TTL cache, per-rule timeouts, backoff.

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Declarative JSON

{
  "entity": "Orders",
  "columns": {
    "orderId": ["required","uuid_v4"],
    "email": ["required","email_pattern"],
    "currency": ["iso4217"],
    "amount": ["number","precision:2","min:0"],
    "createdAt": ["date_iso"],
    "shipTo.country": ["iso3166_alpha2"],
    "shipTo.postal": ["postal_by_country:shipTo.country"]
  },
  "policy": { "fail": "any" }
}

Custom Rule (TS)

export default function postalByCountry({ get, add }: any) {
  const c = String(get('shipTo.country') || '').toUpperCase()
  const p = String(get('shipTo.postal') || '')
  const MAP: Record<string, RegExp> = {
    US: /^[0-9]{5}(-[0-9]{4})?$/,
    CA: /^[A-Za-z]\d[A-Za-z][ -]?\d[A-Za-z]\d$/,
    GB: /^[A-Z]{1,2}\d[A-Z\d]? ?\d[A-Z]{2}$/i
  }
  const re = MAP[c]
  if (re && !re.test(p)) add('postal.pattern', `Postal does not match ${c}`)
}