CSV Viewer. Open & Read CSV Files Online
Drop or paste a CSV and it opens instantly as a clean, sortable, searchable spreadsheet. No editing, no clutter. Sort any column, filter and search across every cell, and read a live column profile that tells you the type, fill rate and numeric range of each field. Delimiter is auto-detected, tens of thousands of rows stay smooth, and everything runs in your browser. Never uploaded.
What is the csv viewer?
The CSV Viewer opens CSV files as a fast, read-only spreadsheet in your browser. Sort any column, search across every cell, and read a live per-column profile showing type, fill rate and min/max/mean. Quoting-aware parsing handles big files, and because it never edits, your data stays untouched and private.
The GigAI CSV Viewer is the quickest way to actually read a CSV without wrestling it into Excel or Google Sheets. A.csv,.tsv or semicolon-delimited export drops straight into a windowed, spreadsheet-style grid: sticky header, tidy monospaced cells, and a row-number gutter so you always know where you are. Because it is read-only by design, you can hand it a production data dump or a client's file and explore it freely (sort, filter, scroll and search) without the risk of nudging a cell or re-saving a mangled file. Parsing goes through papaparse, so the delimiter (comma, tab or semicolon) is auto-detected and the awkward cases are handled correctly: commas inside quoted fields, embedded line breaks, and escaped quotes that a naive split-on-comma would shred. Click any header to sort ascending or descending (numeric columns sort by value, text columns alphabetically) and the sort is a view only, so the underlying order is never disturbed. Type in the search box to instantly filter to the rows that contain your term and see a live match count, which is how you find one record in a file with tens of thousands of lines instead of scrolling forever. What sets the viewer apart is the live column profile: for every column it shows whether the field is numeric or text, how many cells are filled versus empty, how many distinct values it holds, and, for numeric columns, the minimum, maximum, mean and sum. That is an instant sanity check on a dataset: spot the column that is 40% empty, the ID field that should be unique but isn't, or the price column whose max is an obvious outlier. When you want to take the data elsewhere, export a clean, correctly-escaped CSV or a formatted JSON array of objects keyed by your headers. Row virtualisation keeps big files responsive by mounting only the rows you can see. And because every byte is parsed and profiled on your device, confidential exports never leave your machine: close the tab and every trace is gone. Need to actually change cells, add rows or write a real.xlsx? The sibling CSV Editor does exactly that. This tool stays focused on fast, safe reading.
- Difficulty:
- Easy
- Typical time:
- ~15s
- Processing:
- 100% browser processing
Last updated
How to use the csv viewer
- 1
Add your CSV
Drop a .csv or .tsv file onto the workspace, paste rows copied from Excel or Google Sheets, or load a sample. The delimiter is auto-detected and the data opens in the grid.
- 2
Sort, search and profile
Click any header to sort, type in the search box to filter and count matches across the whole sheet, and open the column profile to read each field's type, fill rate and numeric stats.
- 3
Export or copy
Download the data as a clean CSV or a formatted JSON array, or copy the CSV to your clipboard to paste elsewhere. Reset clears the viewer to open another file.
What CSV Viewer includes
Instant read-only spreadsheet
Your CSV opens in a clean grid with a sticky header, row numbers and monospaced cells. It is view-only by design, so you can explore a production file without the risk of editing or re-saving it.
Live column profile
For every column, see its detected type (numeric or text), how many cells are filled versus empty, its distinct-value count, and, for numeric fields, the min, max, mean and sum. An instant data sanity check.
Search across every cell
Type in the search box to filter to matching rows and get a live match count. Locate a single record in a file of tens of thousands of lines instead of scrolling.
Click-to-sort columns
Click a header to sort ascending or descending. Numeric columns sort by value, text columns alphabetically, and sorting is a view, so the file's true row order is never changed.
Quoting-aware parsing
Powered by papaparse: commas inside quoted fields, embedded line breaks and escaped quotes are handled correctly, and the delimiter (comma, tab or semicolon) is auto-detected on open.
Handles big files
Rows are virtualised, so only the visible slice is mounted. Tens of thousands of rows scroll and search smoothly where a plain HTML table would freeze the tab.
Why use our csv viewer
Read a CSV without launching Excel
Peek inside a data export in a browser tab in seconds. No waiting for a heavyweight spreadsheet app, and no import wizard mangling your dates and leading zeros.
Explore safely, read-only
Because there is no editing, you can open a client's file or a production dump and sort, filter and search freely with zero risk of changing a cell or overwriting the original.
Profile a dataset at a glance
The per-column type, fill rate and numeric range surface data problems instantly (an unexpectedly empty column, a non-unique ID, or an outlier value) before it reaches your pipeline.
Keep confidential data on your machine
Every byte is parsed and profiled on your device. Nothing is uploaded, stored or logged, so customer lists, financials and internal exports never leave your browser.
Built for the way you work
From quick one-off fixes to daily workflows, see how people put this tool to use.
- Data analyst
Sanity-check an export before analysis
Drop a raw export, scan the column profile for empty or non-unique fields and out-of-range numbers, and confirm the file is clean before it goes into a notebook or dashboard.
- Developer
Inspect a data file quickly
Open a CSV a service produced, sort by a key column and search for a specific record to verify the output, without importing it into anything or writing a throwaway script.
- Support / Operations
Look up a row in a big export
Search a large contact or order export for one email or ID, read the matching row, and copy the values out, all without the risk of editing the source file.
- Analyst reviewing a hand-off
Review a file someone sent you
Open a client's or colleague's CSV read-only, sort and profile it to understand its shape, and export a tidy CSV or JSON copy without ever altering the original.
Supported formats
Accepts CSV, TSV and TXT, and produces CSV and JSON, all processed locally in your browser.
- CSV
- TSV
- TXT
- CSV
- JSON
Frequently asked questions
Recommended tools
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.
JSON Formatter
Format, validate and minify JSON in your browser with pinpoint error line + column, jump-to-error, key sorting and live editing: nothing is uploaded.
JSON to CSV
Convert JSON to CSV in your browser. Paste an array of objects and get a spreadsheet-ready CSV with a header row, automatic flattening of nested keys, and a choice of comma, semicolon or tab delimiter. Copy or download instantly. Nothing is uploaded.
CSV to Excel
Convert CSV to a real Excel.xlsx file in your browser. Paste or drop a.csv, preview the parsed grid live, name the sheet, and download a workbook that opens natively in Excel, Google Sheets and LibreOffice. Delimiter is auto-detected. Nothing is uploaded.
Comparisons & guides
Go deeper on the concepts behind the csv viewer.
Common problems, solved
Hit a snag? Here are quick fixes for the issues people run into most.
My columns are all jammed into one on open.
The file uses a delimiter the auto-detector didn't pick, usually a semicolon from a European locale, or a tab. The viewer sniffs the most likely delimiter from the content. If a file is genuinely ambiguous, export the data as a comma CSV from here so it opens unambiguously everywhere afterward.
I need to change a cell, but nothing happens when I click it.
That's intentional. This is a read-only viewer, so cells can't be edited. Open the sibling CSV Editor to change cells, add or delete rows and columns, and export a real.xlsx workbook.
A column shows as text but I expected numbers.
The profile marks a column numeric only when every filled cell parses as a finite number. A single stray value (a blank rendered as a dash, a comma thousands-separator, or a currency symbol) flips it to text. Search for the odd value to find it.
The grid says rows were capped.
There's a large soft cap so the browser tab stays responsive on pathological files. If your file exceeds it, split it into parts first, or drop the columns you don't need before opening. The viewer is tuned for tens of thousands of rows, not millions.
Get the most out of it
Paste directly from Excel or Google Sheets: tab-separated clipboard data is detected and opens in the grid, no file needed.
Open the column profile first: it's the fastest way to spot an unexpectedly empty field or a non-unique ID before you dig into the rows.
Click a header once to sort ascending, again for descending. Sorting is a view only, so the file's real order is never touched.
Use the search box to count matches across the whole sheet, then sort the matching column to group related rows together.
Need to edit, not just read? The sibling CSV Editor opens the same file as a fully editable grid with Excel export.
What's new
Recent updates and improvements to the csv viewer.
Initial release, drop/paste a CSV into a fast, read-only, windowed spreadsheet with auto delimiter detection, click-to-sort, search-across-cells, a live per-column profile (type, filled/empty, unique, numeric min/max/mean/sum), and export to CSV and JSON.
Added tab-separated paste-to-view from Excel/Google Sheets, a live match count on search, and a copy-CSV-to-clipboard action.
Refined the column profile layout for wide tables, tuned row virtualisation for large files, and added sample datasets for one-click onboarding.
Keep exploring
Problems we solve
Definitions
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Common tasks
Your privacy is built in
Your CSV is parsed, profiled and re-encoded entirely in your browser. It is never uploaded to any server. Nothing is stored, logged or transmitted, so you can safely view customer lists, financials and internal exports. Because the viewer is read-only, the original file is never modified, and every CSV or JSON export is generated locally on your device. Close the tab and every trace of your data is gone.
- Runs in your browser
- No uploads
- Nothing stored
Ready to try the csv viewer?
Free, private and instant. CSV Viewer runs right in your browser.