CSV Fixer

Auto-fix CSV encoding & delimiters during download so files open cleanly in Excel & Sheets. Processed locally.

Stop fighting with broken CSV files that open as one giant column in Excel. CSV Fixer is an automatic CSV repair tool that repairs as you download — and anything it can't catch in transit, drop into the extension. Smart encoding detection and delimiter detection clean up broken CSV files — no manual cleanup, no copy-pasting, no frustration. Files are processed locally on your device. Your data never leaves your machine. ════════════════════════════════════════ What It Does Automatic CSV repair during download — intercepts downloads, detects issues, and saves corrected versions in one click Smart encoding and delimiter detection — automatically identifies character encoding (UTF-8, UTF-16, ISO-8859-1, Windows-1252) and delimiter type (comma, semicolon, tab, pipe) Excel-ready and Google Sheets compatible — exports UTF-8 with BOM by default so spreadsheets open without the import wizard CSV viewer with live preview — drag-and-drop interface for fixing existing files with instant data preview Local-only processing — files are repaired on your device, never uploaded to any server ════════════════════════════════════════ Why You Need This Have you ever downloaded a CSV and had it: Open as one huge column in Excel or Google Sheets Show garbled text instead of proper characters because of encoding issues Use semicolons or tabs when you needed commas Break your data import with inconsistent formatting CSV Fixer solves all of these automatically with intelligent encoding detection and delimiter detection. ════════════════════════════════════════ Built For Sensitive Data Workflows Because every file is processed locally on your device, CSV Fixer is well-suited for workflows where uploading data to a third-party converter is not an option: HR teams handling employee data exports, payroll CSVs, and confidential personnel records Legal professionals working with case data, discovery exports, and client information Healthcare and medical office staff processing patient data exports and clinical CSVs Financial analysts working with confidential transaction data and account exports Compliance and audit teams handling restricted data sets IT administrators processing system exports that include credentials, identifiers, or PII The free version handles single files up to 25MB. CSV Fixer Pro raises that limit and adds batch processing and custom transformation rules — see Pro features below. ════════════════════════════════════════ Key Features (Free) Automatic download repair — fixes downloads in the background on sites you enable, plus drag-and-drop for any other file Local-only processing — your spreadsheet data never leaves your device UTF-8 encoding detection — smart BOM detection with jschardet fallback for accurate character encoding Delimiter auto-detection — supports comma, semicolon, tab, and pipe delimiters Data cleaning and normalization — removes empty rows and normalizes columns for clean spreadsheet data CSV viewer with preview — see exactly what you're getting before downloading Files up to 25MB — single-file processing at no cost Lightweight Manifest V3 — under 150KB, minimal performance impact ════════════════════════════════════════ CSV Fixer Pro — $5/month or $50/year Unlock advanced features for repeated CSV work: Batch processing — drop multiple files or a folder, get a single zip back with everything fixed Custom transformation rules — drop columns, rename headers, reorder fields, trim whitespace, find and replace, filter rows. Save your rules as named presets and reuse them across files Larger files — 100MB per-file limit (4× the free tier) Local-only — all Pro features process files on your device, same as the free version. No data leaves your machine Click "Go Pro" inside the extension to subscribe. Cancel anytime. ════════════════════════════════════════ How It Works You click a CSV download link You enable CSV Fixer for that site once — a standard Chrome per-site grant from the extension, not a mid-download popup CSV file is fetched and analyzed locally Encoding detection identifies the character set Delimiter detection finds the correct separator Data cleaning removes inconsistencies Fixed version saves as filename__fixed.csv By default, the fixed CSV replaces the original download; you can also configure CSV Fixer to keep both files. Note: browser-generated files (such as exports from sites like census.gov that use blob: URLs) can't be intercepted automatically — drag those into the extension popup to fix them manually ════════════════════════════════════════ Privacy and Data Handling Zero analytics, zero telemetry, zero tracking Files processed entirely on your device — no uploads, no cloud, no external CSV converter No account or signup required for the free version No data sent to external servers from file processing For Pro subscribers, payment is handled by our payment partner (LemonSqueezy). The extension itself does not collect or store payment information Full details in our privacy policy at csvfix.unifiedstack.io ════════════════════════════════════════ Perfect For Data analysts working with CSV exports from CRMs, databases, and SaaS platforms Developers importing CSV data who need reliable encoding and delimiter detection Excel users tired of manual delimiter fixes and broken spreadsheet imports HR, legal, healthcare, and finance professionals handling confidential CSV exports Teams working with international datasets requiring UTF-8 encoding and mixed delimiters Anyone who downloads CSV files regularly and wants to skip the manual cleanup ════════════════════════════════════════ Permissions Explained Required: downloads — to intercept CSV downloads and save fixed files 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, PapaParse for CSV parsing, jschardet for encoding detection, FileSaver.js for downloads. Chrome Extension Manifest V3. ════════════════════════════════════════ Support Found a bug or have a feature request: Leave feedback: click "Leave Feedback" in the extension or visit csvfix.unifiedstack.io/#suggestions Email: contact@unifiedstack.io ════════════════════════════════════════ No signup. No account for the free version. Files stay on your device. Automatic CSV repair for Excel and Google Sheets — fix broken spreadsheet data in one click.