OPEN FORMATS. CLEAR HANDOFFS.THE OPENING COLLECTION / 2026
Useful Horizons

THE WORKBENCH / Useful Horizons

CSV Table Lab

Inspect a small CSV extract in your browser, see its rows and empty cells, and export explicit CSV or JSON without guessing dates or numbers.

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LOCAL WORKSPACE

No upload, account or automatic saving. Your pasted text stays in this page’s memory. Exports are created only when you choose a download.

01 / THE SOURCE

Start with the text.

Comma delimiter only. Maximum 256 KiB UTF-8 text, 1,000 records including headings, 50 columns and 32,768 text characters per cell. Quoted multiline fields are supported.

02 / THE HANDOFF

Choose what changes.

This only changes the table headings and JSON structure. CSV keeps every record. JSON stores separate columns and rows, with every cell as a string.

On by default. Adds the visible prefix text: before formula-like cells, including headings. This changes those values; JSON remains unchanged. Spreadsheet import behavior still needs checking.

0 formula-like cells found. Those cells will receive the text label in CSV.

UTF-8 downloads. CSV writes quoted cells and CRLF record breaks; embedded cell newlines are retained. No number or date conversion.

Fictional sample loaded. Edit it or paste your own small extract.

03 / THE INSPECTION

A table, without guesses.

Data records
4
Columns
4
Input bytes
160

Spaces and line breaks inside cells are preserved. Empty cells are marked for visibility. Detected record breaks: 4 CRLF, 0 LF, 0 CR.

4 data records. The row-number column is for display only.
Rowitem_iditemquantitynote
10017Pencils, blue12Shelf A
20018Notebook3Label says "recycled"
30019Paper0First line Second line
40020Folderemptyempty
Inspect the CSV export text
"item_id","item","quantity","note"
"0017","Pencils, blue","12","Shelf A"
"0018","Notebook","3","Label says ""recycled"""
"0019","Paper","0","First line
Second line"
"0020","Folder","",""
Inspect the JSON export text
{
  "columns": [
    "item_id",
    "item",
    "quantity",
    "note"
  ],
  "rows": [
    [
      "0017",
      "Pencils, blue",
      "12",
      "Shelf A"
    ],
    [
      "0018",
      "Notebook",
      "3",
      "Label says \"recycled\""
    ],
    [
      "0019",
      "Paper",
      "0",
      "First line\nSecond line"
    ],
    [
      "0020",
      "Folder",
      "",
      ""
    ]
  ]
}