Spreadsheets & Data Converter

Convert CSV, TSV, JSON, XLSX & Excel spreadsheets bidirectionally

100% Client-Side Privacy• Instant Processing•4 Formats Supported

Upload CSV file

Automatic format detection • 100% in-browser processing

Max size: 100MB•100% In-Browser Privacy

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Visual Workflow Studio

Supported Spreadsheets Formats4 total

csvCSV Spreadsheet Data

AVAILABLE

Comma-Separated Values tabular data format readable by spreadsheet and database systems.

.csvbrowser

tsvTSV Tab-Separated Data

AVAILABLE

Tab-Separated Values text format used for data analysis and bio-informatics tables.

.tsvbrowser

jsonJSON Data Interchange

AVAILABLE

Standard JavaScript Object Notation format used for APIs and structured datasets.

.jsonbrowser

xlsxMicrosoft Excel Workbook

AVAILABLE

XML-based spreadsheet file format native to Microsoft Excel.

.xlsxbrowser

Why Use Our Online Spreadsheets & Data Converter?

Excel .xlsx Generator

Package CSV rows into a valid Microsoft Excel workbook XML structure with inline strings and worksheets.

Shared Strings XML Parsing

Read Excel files and resolve complex Shared Strings tables into 2D JSON and CSV tables.

Developer-Friendly JSON

Transform database dumps and API payloads between JSON arrays and spreadsheet rows in 1 click.

Instant HTML Tables

Generate styled HTML <table> code ready to embed in web pages and blog posts.

Popular Spreadsheets Conversions

Frequently Asked Questions

Drop your CSV file into the converter, select XLSX as target, and click Convert. A real Excel workbook will be generated instantly.