CSV Redelimiter

Fix broken CSV files automatically during download — 100% offline.

Stop fighting with broken CSV files that open as one giant column in Excel! CSV Redelimiter automatically fixes CSV formatting issues the moment you download them. No more manual cleanup, no more copy-pasting, no more frustration. ════════════════════════════════════════ What It Does Auto-fixes during download: Intercepts CSV downloads, repairs them instantly, and saves corrected versions Smart detection: Automatically detects character encoding (UTF-8, UTF-16, ISO-8859-1, etc.) and delimiter type (comma, semicolon, tab, pipe) Excel-ready output: Exports UTF-8 with BOM by default so files open perfectly in Excel and Google Sheets Manual mode included: Drag-and-drop interface for fixing existing CSV files with live preview ════════════════════════════════════════ Why You Need This Have you ever downloaded a CSV file only to have it: Open as one huge column in Excel? Show garbled text instead of proper characters? Use semicolons when you needed commas? Have inconsistent formatting that breaks imports? CSV Redelimiter solves all of these problems automatically. ════════════════════════════════════════ Key Features Automatic download fixing - Works silently in the background 100% private and offline - All processing happens locally, nothing is uploaded Smart encoding detection - BOM detection + jschardet fallback Delimiter auto-detection - Supports comma, semicolon, tab, and pipe Data cleaning - Removes empty rows and normalizes columns Live preview - See exactly what you're getting before downloading Configurable - Toggle features on/off, set file size limits Lightweight - Under 150 KB, minimal performance impact ════════════════════════════════════════ How It Works You click a CSV download link Extension pauses the download and asks for permission (once per domain) Fetches and analyzes the CSV locally Detects encoding and delimiter Cleans and normalizes the data Saves fixed version as filename__fixed.csv Original download is cancelled, fixed version downloads instead ════════════════════════════════════════ Privacy First Zero data collection - No analytics, no telemetry, no tracking No cloud processing - Everything happens on your device No external servers - The extension never sends your data anywhere Open source - Code is available for review on GitHub ════════════════════════════════════════ Perfect For Data analysts working with CSV exports from various sources Developers importing CSV data into applications Anyone who regularly downloads CSV files from websites Excel users tired of manual delimiter fixes Teams working with international datasets (mixed encodings) ════════════════════════════════════════ Permissions Explained Required: downloads - To intercept and fix CSV downloads Optional (requested per-domain): host permissions - To fetch CSV files for processing (only when you download from a specific website) ════════════════════════════════════════ Technical Details Built with TypeScript for reliability Uses PapaParse for robust CSV parsing jschardet for accurate encoding detection FileSaver.js for reliable downloads Follows Chrome Extension Manifest V3 standards ════════════════════════════════════════ Support Having issues? Found a bug? Open an issue on our GitHub repository. ════════════════════════════════════════ No signup. No account. No servers. Just pure, private CSV fixing.