The latest articles on DEV Community by mickey chen (@mickey921205). https://dev.to/mickey921205 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4086182%2F526c58ac-ec3e-47f5-9952-57cbed0ace80.png https://dev.to/mickey921205 en mickey chen Thu, 20 Aug 2026 07:22:29 +0000 https://dev.to/mickey921205/i-built-datafix-a-local-first-xlsxcsv-cleaner-for-messy-regional-data-4m80 https://dev.to/mickey921205/i-built-datafix-a-local-first-xlsxcsv-cleaner-for-messy-regional-data-4m80 <p>Ever opened a spreadsheet and found Big5, Shift-JIS, 1.234,50, ROC dates, full-width characters and NULL all mixed together?</p> <p>I built DataFix — a privacy-first data cleaner that runs entirely in your browser.</p> <p>It now supports:</p> <p>XLSX / CSV / TSV / JSON<br> UTF-8 / Big5 / Shift-JIS / Windows-1252<br> date &amp; number normalization<br> full-width characters<br> missing values<br> broken / duplicate headers<br> multi-sheet XLSX</p> <p>No file upload. Your data stays on your device.</p> <p>Demo: <a href="https://datafix-tw.mickey921205.workers.dev" rel="noopener noreferrer">https://datafix-tw.mickey921205.workers.dev</a></p> <p>GitHub: <a href="https://github.com/mickey921205/datafix" rel="noopener noreferrer">https://github.com/mickey921205/datafix</a></p> <p>Looking for weird synthetic data edge cases to break it.Could you please give it a star?</p> javascript opensource showdev tools