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N43 Bridge

Local-first web tool for converting XLS, XLSX and CSV bank statements to Spanish Norma 43 without uploading transaction data.

Public web prereleasev0.1.0-dev.34dev v0.1.0-dev.36

Version 0.1.0-dev.34 imports spreadsheets in the browser, normalizes movements, validates balances and generates a structurally checked Norma 43 file before download.

N43 Bridge
01

Local import

Reads XLS, XLSX and CSV in the browser, detects common columns and allows manual mapping when a bank export needs adjustment.

02

Norma 43

Generates records 11, 22, 23, 33 and 88 with record-width, count, debit/credit total, currency and closing-balance checks.

03

Balance reconciliation

Reconstructs opening balance from consistent checkpoints and blocks generation when imported balances do not reconcile or prerequisites are missing.

04

IBAN and CCC

Validates Spanish account identifiers locally and derives N43 entity, office and account fields without silently coercing non-Spanish IBANs.

05

Observed Revolut flows

Handles observed standard Revolut and Savings exports with Product scoping, signed fees, currency checks and sub-cent source values.

06

Privacy and validation

There is no backend, database or account system. A real N43 generated from a privately validated statement has been cross-checked by two independent parsers.

Current evidence

Current evidence

Public web 0.1.0-dev.34XLS / XLSX / CSVNorma 43 · records 11/22/23/33/88Observed standard and Savings Revolut exports13 synthetic bank-shaped fixturesCross-validation with two independent parsers

Current limits

Current limits

  • Synthetic multi-bank fixtures are not universal compatibility claims for each bank.
  • Real import into Sage 50, A3 or another ERP has not yet been validated and is not advertised as compatible.
  • PDF, OCR, PSD2 and bank APIs remain outside the current scope.
01

Import

Load the XLS, XLSX or CSV locally.

02

Review

Confirm mapping, currency, product and balances.

03

Identify

Validate IBAN/CCC and the N43 account fields.

04

Generate

Create, validate and download the Norma 43 file.

Access

Public web 0.1.0-dev.34

N43 Bridge is proprietary software with public web access at n43.cecolab.cat as a prerelease. Bank statements and account identifiers are processed locally in the browser and are not sent to CECO Lab.

Public web appOpen N43 BridgeOpen N43 Bridge