I can't open or read a large CSV file
When a CSV is too large or messy for Excel, view it as a clean table you can search and sort: privately.
To read a big or awkward CSV without wrestling a spreadsheet, use an online CSV viewer: it loads the file into a searchable, sortable table in your browser. No upload, no row limit fights. Our CSV Viewer and Editor do exactly this, and you can convert the data to JSON or a spreadsheet from there.
4 tools for this
Each one is free, private and runs in your browser. No sign-up, no watermark.
CSV Viewer
View CSV files online as a fast, sortable spreadsheet, search across every cell, sort any column, and read a live per-column profile with row/column counts and numeric stats. Read-only, so you never touch the data. Nothing is uploaded.
CSV Editor
Open, edit and clean CSV files in your browser as a real spreadsheet, fix cells, add or delete rows and columns, sort, find, and export to CSV, JSON or Excel. Nothing is uploaded.
CSV to JSON
Convert CSV to JSON in your browser. Paste or drop a.csv and get a clean array of objects or arrays with a header toggle, optional number/boolean type inference and pretty or minified output. Nothing is uploaded.
Excel to CSV
Convert Excel to CSV in your browser. Drop an.xlsx or.xls, pick the sheet you want and download a clean, correctly-quoted CSV. Multi-sheet workbooks, commas inside cells and quoted fields are all handled. Nothing is uploaded.
How to fix it
Follow these steps and you'll have it sorted in a couple of minutes.
- 1
Open the CSV Viewer
Drop your.csv file in, it's parsed in your browser, never uploaded.
- 2
Read it as a table
The data loads into a proper table you can scroll, search and sort by column.
- 3
Edit if needed
Use the CSV Editor to fix values, remove columns or clean up a messy export.
- 4
Convert onward
Turn the data into JSON for code, or into a spreadsheet format, straight from the viewer.
- Fighting a spreadsheet's row limits when a browser viewer just streams the file into a table.
- Assuming a broken layout is corruption when it's usually the wrong delimiter. Check comma vs semicolon vs tab.
- Editing a huge CSV by hand when converting to JSON or a spreadsheet would be faster for your task.
Frequently asked questions
More problems we solve
Ran into one of these too? Here's the fix.
- I need to convert a CSV file to JSONMove data between a spreadsheet and code without a script. Header row becomes keys, each row becomes an object.
- I need to convert an Excel spreadsheet to PDFSend a spreadsheet that keeps its layout and can't be edited, ideal for reports, invoices and quotes.
- My JSON is invalid and I can't find the error'Unexpected token' almost always means one stray character. A validator points straight at it so you're not hunting by eye.
Keep exploring
Problems we solve
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Common tasks
Ready? Start with CSV Viewer
Free, private and instant: everything runs in your browser.