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Tool • Core Dataset Explorer

CSV Viewer & Data Inspector

Sort, search, inspect column data types, and check dataset null stats completely inside your browser memory.

Drop your CSV or TSV file here

Drag and drop your spreadsheet to inspect it. Zero cloud uploads.

Accepted:.csv.tsv.txtMax 5 MB

100% In-Browser Memory

About this tool

The CSV viewer opens a CSV file online so you can sort, search, and inspect it without a spreadsheet app. The table view supports clickable column sorting, full-file search, and pagination, while the column profiler tab shows each column's detected type, unique count, missing count, and sample values.

Sort any column (numeric-aware) and search across all cells
Column profiler: type, unique values, missing cells, samples
Raw preview of the first 100 rows
CSV export of the inspected dataset

Who it is for

Useful for anyone who receives a CSV export and needs a quick answer: what columns exist, which cells are blank, and whether the file is worth cleaning or charting.

How to use it

Choose a CSV, TSV, or TXT file (up to 5 MB) — it never leaves your browser.
Use Table View to sort columns and search within records; adjust rows per page (10–100).
Open Column Profiler to check types and missing counts per column.
Download the CSV when you need a copy, or continue in the Cleaner or JSON converter.

Example

city,country,orders
Berlin,Germany,14
Paris,France,9
Munich,Germany,11
search: berlin → 1 of 3 rows

Searching for “berlin” keeps only rows containing it in any cell:

Formats and workflow

Accepted: .csv, .tsv, .txt with automatic delimiter detection; UTF-8 reading.
Empty lines are skipped during parsing; blank cells display as null in tables.
Export: CSV download to your device.

Viewing is the inspection step. Once you understand the shape, clean messy values, check overall quality, or convert formats. CSV Cleaner, Data Profiler, CSV to JSON.

Common questions

What is a CSV viewer?

A CSV viewer opens a comma- or tab-delimited file as a readable table so you can sort, search, and check its structure without a spreadsheet program. Datio's viewer adds a column profiler that shows each column's detected type, unique values, missing cells, and samples.

How do I view a CSV file online without Excel?

Open Datio's CSV Viewer and choose the file from your device — it is parsed locally, never uploaded. Sort any column by clicking its header, search across all records, page through results, and download a CSV copy whenever you need one. No signup or install required.

How can I see which cells are blank?

Open the Column Profiler tab: every column lists its missing-cell count, and blank cells display as null in the table. For file-wide totals, the Data Profiler reports the total missing-cell count plus a per-column breakdown. Data Profiler →

CSV Viewer or CSV Cleaner — what's the difference?

The Viewer inspects without changing anything: sorting, searching, and type checks. The Cleaner changes the data: it removes duplicates and blank rows, trims whitespace, and normalizes casing. Inspect first, then clean. CSV Cleaner →

Limitations

The viewer is for inspection of one file at a time (up to 5 MB). It does not edit cells in place — use the Cleaner for deduplication and casing, or Transform & Filter for column transforms.

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