CSV Converter Pro

Convert CSV files to XLS, XLSX, JSON, or PDF — entirely offline.

CSV Converter Pro turns any CSV file into the format you actually need — XLSX, XLS, JSON, or PDF — in one click, without ever sending your data anywhere. HOW IT WORKS 1. Click the CSV Converter Pro icon 2. Choose a CSV file from your computer 3. Pick an output format: XLSX, XLS, JSON, or PDF 4. Click Convert & Download That's it — the converted file downloads immediately. WHY CSV CONVERTER PRO • Completely offline. All conversion happens locally in your browser using bundled libraries. Your file is never uploaded, transmitted, or stored anywhere. • No account, no sign-up, no tracking. • Zero network permissions. This extension cannot make network requests — check the permissions yourself. • Fast. No waiting on uploads or a server round-trip. • Handles real-world CSVs: quoted fields, embedded commas, embedded newlines, and quote-escaping are all parsed correctly. SUPPORTED OUTPUT FORMATS • XLSX — modern Excel spreadsheet • XLS — legacy Excel 97-2003 format • JSON — array of objects, one per row, keyed by your header row • PDF — clean, styled table, formatted to stay readable even with many columns PRIVACY FIRST CSV Converter Pro requests no permissions beyond showing its own popup. There are no host permissions, no chrome.downloads permission, and no background service worker phoning home. Your CSV data is processed entirely in memory in your browser tab and is discarded the moment you close the popup. Perfect for anyone who needs a quick, private, one-off CSV conversion — analysts, developers, students, or anyone handling sensitive spreadsheet data they'd rather not upload to a random website.