Convert CSV to Excel Online Free
Data to Excel is a free browser tool to convert CSV to Excel online free — and it converts JSON and tab-delimited (TSV) text too. Paste your data or drop a file, preview the result as a table, and download a clean .xlsx workbook. No server ever sees your data. The whole conversion runs in your browser — no upload, no account, no app to install.
Paste your CSV, JSON, or TSV data into the box above (or drop a file), tap Convert to Excel to preview it as a table, then tap Download .xlsx. Use Settings to change the input delimiter if auto-detect picks the wrong one — it all runs in your browser.
Ready to convert? It takes one tap.
Use the free Data to Excel converter →How to Convert CSV to Excel (.xlsx)
Data to Excel is a csv to excel converter online free that runs entirely in your browser tab — your data is parsed on your own device, never uploaded. Values containing commas, quotes, or line breaks are handled correctly, so the structure survives the round trip.
- Open capsuletools.app/data-to-excel/
- Paste your CSV text into the box, or drop a .csv file onto it
- Tap Convert to Excel, check the preview, then tap Download .xlsx
The workbook downloads straight to your device as a single-sheet .xlsx file, named after your source file
(or data.xlsx if you pasted text directly).
Looking for a csv to xls online free tool instead? Data to Excel outputs the modern .xlsx format — the same one Excel, Google Sheets, and Numbers use by default — rather than the legacy .xls, so your file opens cleanly everywhere without a version warning. It also works as a csv to excel converter mac users can rely on just as easily as Windows or Chromebook users, since there's nothing to install — it all runs in the browser tab itself.
Convert JSON to Excel Online
Paste a JSON array or drop a .json file and Data to Excel becomes a json to excel converter online free. It finds the array of records and turns each object's keys into a header row — there is nothing to configure.
- An array of objects — the most common shape — becomes a table with one column per key, so you can convert a JSON array to Excel online without any extra setup.
- A wrapped response like
{ "rows": [ … ] }is detected automatically. - A simple list of values becomes a single-column table.
Convert Tab-Delimited (TSV) Text to Excel
As a tsv to excel converter online free, Data to Excel auto-detects tab-separated text by default, so pasting a TSV export just works. If you ever need to be explicit, open Settings below the input box and choose Tab before converting.
Choose Your Input Delimiter — Comma, Tab, or Semicolon
Auto-detect handles most CSV and TSV data correctly, but for edge cases — like a semicolon-delimited export from a European-locale spreadsheet — open Settings and pick Comma, Tab, or Semicolon yourself. JSON input never needs this; it's always detected automatically.
Preview Your Data Before You Download
After conversion, Data to Excel shows a live preview table with a row and column count, so you can confirm the data landed correctly before you download — no surprises when you open the file. Values land as plain text and numbers with no styling applied, so if you need to import csv to excel without formatting, that's exactly what you get by default.
Frequently asked questions
How do I convert a CSV file to Excel without losing data?
Open Data to Excel, paste your CSV text or drop the .csv file, then tap Convert to Excel. Because the parser runs client-side and escapes commas, quotes, and line breaks correctly, every cell value is preserved. Check the preview table before you download to confirm nothing looks off.
How do I convert JSON to Excel online?
Paste a JSON array or drop a .json file onto Data to Excel. The tool finds the array of records, turns each object's keys into a header row, and builds a proper spreadsheet grid — no code, no upload. Tap Download .xlsx once the preview looks right.
Can I convert a nested or large JSON file to Excel?
Nested objects and arrays inside a JSON record are flattened into a single cell as compact JSON text, so the structure isn't lost even though it isn't split into extra columns. Data to Excel handles input up to about 50 MB entirely in your browser, with no upload — files over that limit show a warning instead of crashing the tab.
How do I convert tab-delimited (TSV) text to Excel?
Paste your tab-separated text into Data to Excel — it's auto-detected by default. If detection ever picks the wrong separator, open Settings below the input box and choose Tab explicitly, then tap Convert to Excel.
Can I convert CSV to Excel with a semicolon delimiter?
Yes. Open Settings below the input box and choose Semicolon before converting — useful for CSV exports from spreadsheet software set to a European locale, or data that already contains commas inside its values.
Can I paste CSV text directly into Excel format without a file?
Yes — the input box is a paste target, not just a file drop zone. Copy your CSV, JSON, or TSV text from anywhere and paste it straight in, then tap Convert to Excel. No file ever has to touch your disk if you don't want it to.
Use the free Data to Excel converter →
