Local CSV

What it does

Local CSV is a free, browser-based suite of CSV tools — clean, dedupe, convert, and reshape spreadsheet data entirely on your device. No sign-up, no file uploads, no server ever touches your data. Part of the LMSTools.cloud family.

Clean, deduplicate, format, and filter CSV spreadsheets directly in your browser. 100% private client-side processing with zero server uploads.

Clean, deduplicate, format, and inspect large CSV files directly on your device. Powered by Web Workers for seamless performance without freezing your browser. Supports CSV, TSV, or plain text spreadsheet exports up to 100MB+. Traditional online spreadsheet tools require you to upload proprietary customer records, financial rosters, and email lists to a remote cloud server. Local CSV redefines spreadsheet engineering by executing all parsing, deduplication, string trimming, and format transformation natively in your web browser using HTML5 File APIs and streaming Web Workers. Whether you need to scrub 500,000 lead rows before importing into a CRM or fix corrupted accented characters, your…from localcsv.space

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