LigneClaire helps French-speaking resellers prepare supplier catalogues. It normalizes supported French EUR price formats, preserves product references and isolates duplicate or invalid rows. Processing happens locally in the browser: catalogues are not uploaded. Two downloads are included: accepted rows and a complete anomaly report. The free web beta includes useful exports. Limits: UTF-8 CSV/TSV, 5,000 rows and 2 MB. No PDF, native XLSX, OCR, ERP integration or manual correction. An offline package with the application, examples and guide is available for a one-time 19 EUR purchase for French businesses, through PayPal.