New MTKits launch

CSV ↔ JSON + Excel → JSON: Fast, Mobile-Friendly Converters

We shipped two new data tools built for developers and analysts: a two-way CSV ↔ JSON converter and an Excel → JSON exporter with sheet selection and row limits. Both run entirely in the browser—no uploads to a server.

CSV ↔ JSON

Delimiter control (comma, semicolon, tab, pipe).
Header detection with safe defaults.
Upload, copy, download, and sample data.
Handles quoted values and new lines.

Excel → JSON

Accepts .xlsx, .xls, and .csv files.
Sheet picker plus row limit for lighter exports.
Preview of first rows before copying.
One-tap copy or download as .json.

Quick start

Open CSV ↔ JSON or Excel → JSON.
Paste data or drop a file. On mobile, use the upload chip for faster picks.
Adjust delimiter, headers, or row limits, then copy or download the result.

How the online tools work

Upload: Tap the upload chip to choose a CSV/JSON or Excel file. Files are read locally in your browser; nothing is sent to a server.
Manage: Pick delimiters, toggle headers, choose a sheet, and set row limits to keep exports lightweight. Preview the first rows to spot issues fast.
Download: Copy the cleaned output with one tap or download it as .json or .csv instantly.

Why we built it

APIs and spreadsheets rarely agree on format. These converters let you move between CSV, Excel, and JSON without opening heavy desktop apps. Everything stays local in your browser—ideal for quick debugging, analytics handoffs, or shipping fixtures with your code.

Mobile-first details

Large tap targets and responsive grids for phones and tablets.
Row limits prevent memory spikes on mobile devices.
Inline previews and copy/download buttons you can reach with your thumb.

Ready to convert faster? Try CSV ↔ JSON Try Excel → JSON

CSV ↔ JSON and Excel → JSON: New MTKits Converters for 2025