Browser 106

max 50MB

Inspector document/spreadsheet-converter

Spreadsheet Converter

Overview

Spreadsheet Converter lets you convert files between CSV, Excel (XLSX/XLS), and JSON in any combination — CSV to JSON, XLSX to CSV, JSON to XLSX, and every other pairing — directly in your browser. Auto-detection handles CSV delimiters so you can drop in files exported from any tool without adjusting settings. Because processing runs locally via JavaScript and never touches a server, sensitive business data, personal records, or confidential exports stay entirely on your device. A live preview shows the reformatted data before you download, so you can catch structural issues — like nested JSON fields being flattened to dot-notation columns — before committing to the file.

CSV to JSON for DevelopersDevelopers convert exported CSV datasets — from databases, analytics tools, or CRMs — into JSON arrays or arrays-of-objects ready for ingestion by an API or application.
Excel to CSV for Data PipelinesData analysts strip XLSX files down to plain CSV so they can pipe records into pandas, dbt, or any CLI tool that expects delimiter-separated input.
JSON to Excel for ReportingProduct or operations teams take JSON API responses and convert them to XLSX for sharing pivot-table-ready reports with stakeholders who work in Excel.
Privacy-Sensitive Record ConversionHR teams and finance staff convert payroll or compliance spreadsheets without risking exposure — files never leave the browser so no data is transmitted to any server.
Delimiter NormalizationUsers reconcile semicolon-delimited European CSV exports against comma-delimited files by re-exporting to a consistent delimiter or to XLSX before merging datasets.

Key features

Converteer tussen CSV, XLSX en JSON
Multiple output format options
Customizable delimiters and structure
Live preview before conversion
Support for large files
Auto-detect CSV delimiters

Set

Document 11

Neighbours

01 Factuur Generator 02 CSV naar JSON Converter 03 CSV naar XLSX Converter 04 JSON naar CSV Converter 05 JSON naar XLSX Converter 06 Markdown-editor met livevoorbeeld

Specification

Command: document.spreadsheet_converter
Set: Document
Input: MIXED
Output: MIXED
Max. bestand: 50MB
Batch: single file

CSV VND.OPENXMLFORMATS-OFFICEDOCUMENT.SPREADSHEETML.SHEET VND.MS-EXCEL JSON

Runtime

Engine: SheetJS · Intl.Segmenter
Threads: single
Isolated: —
WebGPU: —
Memory: —

Transport 0 B

The file is opened, worked on and written back inside this tab. No upload step exists in this tool — there is nowhere for the bytes to go.

Keys

Zoeken: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

How it works

Upload Your File

Select your CSV, XLSX, or JSON file. The tool automatically detects the format and structure of your data for optimal conversion.

Choose Output Format

Select your desired output format (CSV, XLSX, or JSON) and customize conversion options like delimiters, JSON structure, or Excel formatting.

Preview & Download

Review the converted data in the live preview to ensure accuracy, then download your file in the new format instantly.

Frequently asked

What file formats can I convert between?

You can convert between CSV, Excel (XLSX/XLS), and JSON formats in any direction. For example: CSV to JSON, XLSX to CSV, JSON to XLSX, and all other combinations.

How does the tool handle different data structures?

The converter intelligently adapts to your data structure. CSV and Excel data become array of objects in JSON, while JSON arrays can be converted to tabular CSV/Excel format with automatic column detection.

Can I customize the conversion options?

Yes, you can customize CSV delimiters (comma, semicolon, tab, pipe), JSON output structure (array of objects or arrays), and Excel formatting options to match your specific needs.

What happens to complex data during conversion?

Nested JSON objects are flattened using dot notation for CSV/Excel conversion. Excel formulas are converted to their calculated values. Data types are preserved as much as possible across formats.

Is there a preview before downloading?

Yes, the tool provides a live preview showing exactly how your data will look in the target format. This allows you to verify the conversion before downloading.

Are there any file size limitations?

The tool can handle files up to 50MB efficiently. For larger datasets, consider splitting your data into smaller files before conversion.

How is data privacy maintained?

All conversions happen entirely in your browser. Your files are never uploaded to our servers, ensuring complete privacy and security of your data.

Keys

Zoeken: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

Gerelateerd · Document