CSV Viewer

A CSV viewer displays comma-separated values as a readable table instead of raw text. It helps you inspect headers, rows, data types, empty cells, delimiters, and unusually long values before importing or transforming the file.

Yes. ToolsSonic reads a pasted CSV or a local file in your browser. The viewer does not send rows to a server or store a persistent copy, which makes it useful for quick inspection of private or development data on a trusted device.

Yes. The viewer can auto-detect tab-separated values and also lets you choose tab manually. Comma, semicolon, and pipe delimiters are supported for regional exports and developer data files.

Yes. Select any visible column header to sort ascending, then select it again to sort descending. Numeric-looking values use numeric ordering where possible, while text values use natural case-insensitive ordering.

Use the row filter above the table. The viewer searches across every value in each row and updates the filtered count and pagination immediately. Filtering happens in memory and does not change the original input text.

Yes. Use the Visible columns controls to hide fields that are not relevant to the current inspection. Hidden columns are also excluded from the Copy visible CSV and Download CSV actions, so you can create a focused extract.

Yes. Its quote-aware parser recognizes doubled quotes, delimiters inside quoted fields, and line breaks inside quoted cells. This prevents common column-shift errors in exported CSV files.

Yes. Smart value detection recognizes ordinary numbers and the literal values true and false for sorting and display. Choose Keep all values as text when identifiers, ZIP codes, account numbers, or leading zeros must remain unchanged.

The viewer paginates the table and keeps the preview bounded per page. The practical limit depends on browser memory and column width because parsed rows remain in page memory. Very large datasets are better handled with a streaming or database workflow.

Yes. After filtering rows or hiding columns, Copy visible CSV and Download CSV produce a CSV containing the current filtered rows and visible columns. The original input remains available in the editor.

It handles common comma-delimited and UTF-8 text exports, quoted fields, tabs, semicolons, and pipes. If a spreadsheet uses a locale-specific delimiter or unusual encoding, choose the delimiter explicitly and verify the first rows after parsing.

CSV Viewer is optimized for inspecting, sorting, searching, and filtering rows. CSV Formatter is optimized for normalizing the text representation and quoting. Use the viewer to understand the data and the formatter before handing it to another system.

Paste the CSV or load the file and it renders as a scrollable table with headers — much easier to read than raw comma-separated text, and with no spreadsheet software needed.

Yes. Click a column header to sort rows by that column, which is the quickest way to find extremes and spot bad values.

Yes. Parsing follows RFC 4180, so quoted fields containing commas or line breaks display as single cells rather than splitting the row.

It reports the row and column counts so you can instantly confirm an export is complete before using it elsewhere.

Yes, within browser memory. There is no server limit because the file is parsed locally; very large exports simply take a moment to render.

Everything runs locally in your browser with no upload, no account, and no logging. You can confirm in your browser DevTools Network tab that no request carries your data.