Drop, paste, or upload your CSV — view it instantly. 100% private, no sign-up, no upload to a server.
New to CSV? Read our guide on how to open a CSV file or learn what a CSV file is. You can also plot your CSV as a chart.
Quick answer
CSV Viewer Online is a free, privacy-first web app that lets you open, view, edit, sort, filter and convert CSV files directly in your browser. Everything runs client-side — no upload, no signup. It streams files up to 100,000 rows free (2M with Pro) with virtual scrolling, auto-detects UTF-8, UTF-16 and Windows-1252 encodings, keeps leading zeros, and exports to Excel, JSON or back to CSV. Free forever.
Drag & drop your CSV file here
Supports .csv and .txt files
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Everything you use today stays free. Pro kicks in when files get big and when you need unlimited merge, split and dedupe — same privacy, nothing ever uploaded.
Export your data in CSV format from Excel, Google Sheets, or any other spreadsheet application.
Either upload your CSV/text file directly or copy the content from a text editor.
Use the file upload button or paste the content into the text area of our CSV viewer.
Your data is immediately converted into an easy-to-read interactive table.
Streamed parsing with virtual scrolling: 100,000 rows free, up to 2M rows with Pro — smooth on a modern laptop.
Zero data uploaded. Your CSV is parsed entirely in your browser — never sent to any server.
Detects UTF-8, UTF-16 and Windows-1252 / ISO-8859-1, so accents from Excel on Windows display correctly.
Click any cell to edit. Undo/redo history, multi-cell selection, and one-click export back to CSV, Excel or JSON.
Runs on Chrome, Firefox, Safari, Edge across desktop, tablet, and mobile. No installation, no account.
Automatically detects delimiter (comma, semicolon, tab, pipe), quote style, header row and column data types.
CSV Viewer Online is a free, browser-based tool to open, visualize, edit, sort, filter and download CSV files. Drop, paste or upload a file and instantly get an interactive table — no signup, no installation, no data ever leaves your browser.
Data analysts, product managers, developers, marketers, journalists and anyone who needs a quick CSV tool with strong privacy guarantees — no signup, no installation, no Google Sheets or Excel required.
Transform your CSV data into beautiful charts and visualizations instantly.
Create ChartsBuild CSV files from scratch in your browser — add columns and rows, then download.
Open CreatorStep-by-step guide to opening CSVs on Mac, Windows, Linux, iOS and Android.
Read the GuideOpen CSV files too big for Excel — 100,000 rows free, up to 2 million with Pro.
Open a Large FileProduct import rejected? Find broken prices, encoding, headers and variants before Shopify does.
Check My Shopify CSVConvert
Open .xlsx, .xls or .xlsm files and export each sheet as clean CSV.
Convert CSV to .xlsx with proper UTF-8, accents and special characters preserved.
Array-of-objects or array-of-arrays JSON with custom indentation.
Auto-flatten nested objects and arrays into a clean CSV.
Learn
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You don't need Python or Excel formulas to analyze CSV data anymore. Here are the best no-code tools for filtering, visualizing, and understanding your data.
AI tools like ChatGPT, Claude, and Gemini can now analyze CSV files in seconds. Here's what works, what doesn't, and how to use AI for data analysis.
Exporter des données personnelles en CSV peut poser des problèmes RGPD. Voici les règles à connaître et les bonnes pratiques pour rester conforme.
A CSV file is a plain text file containing tabular data separated by commas. You can create or obtain a CSV file from:
You have three ways to load your CSV data:
Once you've uploaded or pasted your CSV:
Make changes to your data right in the table:
When you're done:
A typical e-commerce product catalog:
ProductID,Name,Price,Stock,Category 1,Wireless Headphones,79.99,45,Electronics 2,USB-C Cable,12.99,150,Accessories 3,Laptop Stand,34.50,28,Office 4,Mechanical Keyboard,129.99,18,Electronics 5,Monitor Light,45.00,62,Office
Try pasting this to view a product inventory with pricing and stock information.
A customer relationship management contact list:
FirstName,LastName,Email,Phone,Company,Region Jean,Martin,jean@example.com,+33612345678,TechCorp,EU Maria,García,maria@example.com,+34912345678,InnovateLabs,EU Hans,Schmidt,hans@example.com,+49301234567,DataSoft,EU Sophie,Dubois,sophie@example.com,+33712345678,CloudWorks,EU
Perfect for managing client lists with contact details and organization info.
International data with special characters:
Nom,Prénom,Date_Commande,Montant,Ville Müller,François,2024-01-15,€250.50,Zürich Côté,Amélie,2024-01-20,€180.00,Montréal Rösel,José,2024-01-25,€320.75,São Paulo Dąbrowski,Łukasz,2024-02-01,€150.25,Kraków
Demonstrates handling of accented characters and dates in international contexts.
Monthly sales figures for chart generation:
Month,Sales,Profit,Expenses January,15000,3500,11500 February,18500,4200,14300 March,21000,5100,15900 April,19800,4800,15000 May,24500,6200,18300
Use this to visualize trends with our Chart Generator tool.
Problem: Your CSV uses semicolons or tabs instead of commas.
Fix: Replace all separators with commas before importing, or paste your data so our tool can auto-detect.
Problem: Characters like é, ñ, ü appear as garbled text.
Fix: Open it here: the encoding is detected automatically. To fix the file itself, re-save it as CSV UTF-8 in Excel or Google Sheets.
Problem: Some rows have different numbers of columns than others.
Fix: Ensure every row has the same number of columns as the header row. Add empty values if needed.
Problem: Text containing commas must be wrapped in quotes, and quotes must be properly closed.
Fix: Ensure all quoted fields have matching opening and closing quote characters.
Problem: Extra blank lines between rows cause parsing issues.
Fix: Our tool automatically skips empty lines. If needed, manually remove blank rows before importing.
| Feature | CSV Viewer | Excel |
|---|---|---|
| Installation Required | No | Yes (Download) |
| Free | Yes | Subscription |
| Privacy (Local Processing) | Yes | Cloud Sync |
| Load Large Files | Fast | Slow |
| Quick Viewing | Instant | Slower |
| Mobile-Friendly | Yes | Limited |
| Advanced Formulas | No | Yes |
| Feature | CSV Viewer | Google Sheets |
|---|---|---|
| Sign-Up Required | No | Yes (Google Account) |
| Privacy (Data on Server) | 100% Local | Google Servers |
| Offline Access | Full Access | Limited |
| Speed | Instant | Network Dependent |
| Collaboration | No | Real-time |
| Formulas & Functions | No | Yes |
| Cost | Free | Free (with limits) |
All your data is processed directly in your browser. Nothing is ever sent to our servers. Your CSV stays completely private and secure on your device.
No network delays. Instant results as you type. Even large CSV files are processed in milliseconds because everything happens locally.
Start using immediately without signing up, creating an account, or providing any personal information.
Intuitive interface with drag-and-drop support. Edit directly in the table. Dark mode for comfortable viewing.
View, edit, and download CSVs. Plus: create charts, build CSVs from scratch, and convert between Excel and CSV formats.
Handles CSV and TSV, with comma, semicolon, tab or pipe delimiters. The encoding is detected automatically, so accents and special characters display correctly.
A CSV (Comma-Separated Values) file is a simple text file format that stores tabular data. Each line in the file is a row of data, and columns are separated by a specific character, usually a comma. CSV files are widely used for exchanging data between different systems and applications. For the long version, see our complete guide to the CSV format.
You can create a CSV file from most spreadsheet applications like Microsoft Excel or Google Sheets by using the "Save As" or "Export" option and selecting the CSV format.
An online CSV viewer like ours offers several advantages: no software installation required, instant access from any device, fast data processing, and a user-friendly interface to easily visualize your CSV data as a structured table.
Yes. Click any cell to edit its value. Use the undo/redo buttons to revert changes, and the "Save Changes" button to persist your edits before exporting back to CSV, Excel or JSON.
Absolutely. Your CSV file is parsed 100% locally in your browser — nothing is ever uploaded to a server, nothing is stored online. No signup, no tracking of your file contents.
The tool supports CSV and TSV files, and auto-detects comma, semicolon, tab and pipe delimiters. The encoding is detected too: UTF-8, UTF-16 (with a byte order mark) and Windows-1252 / ISO-8859-1, the format Excel uses on Windows. Accents and special characters display correctly.
You can upload .csv, .txt and .tsv files directly. For Excel, use the Convert page to turn .xlsx/.xls into CSV first. All parsing happens in your browser.
Files are parsed in streaming with virtual scrolling. The free tier shows the first 100,000 rows; Pro streams up to 2 million rows on a modern laptop. In our July 2026 test, a 68 MB file with 1.05 million rows streamed in about 7 seconds. The practical limit depends on your available RAM.
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