Free Excel to JSON & JSON to Excel Converter | GSTR-1 Offline Tool

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Excel & JSON Smart Converter Hub

Fast, 100% Client-Side Data Processor & GSTR-1 Offline Helper

🔒 100% Client-Side (No Uploads)

Convert Excel (.xlsx, .xls, .csv) to Structured JSON

Extract rows and headers from any spreadsheet into standard JSON array format.

Click to Upload Spreadsheet
Supports Microsoft Excel (.xlsx, .xls) and CSV (.csv)

Convert JSON Array to Excel Spreadsheet (.xlsx)

Paste your raw JSON code or object array to compile an instant downloadable Excel file.

Portal GSTR-1 (.json) to Clean Excel Sheet

Reconciliation

Unpacks nested B2B invoices and line items from GST portal downloads into flat Excel rows.

Select GSTR-1 JSON Return File
Directly parse payload files downloaded from gst.gov.in

Sales Register Excel to GSTR-1 Portal JSON

Download Sample Template

Format raw invoice lists into the valid schema accepted by the GST Offline Upload utility.

Select Invoices Spreadsheet (.xlsx)
Columns needed: GSTIN, Invoice No, Date, Value, Rate, Taxable Value
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Complete Guide to Excel & JSON Conversion Utilities

Managing data workflows between client applications, databases, and statutory filing portals requires instant, error-free conversion. This lightweight suite processes every transformation entirely inside your browser, ensuring maximum execution speed and total privacy.

1. General Excel to JSON Conversion

Developers and data analysts frequently need to serialize flat tables into structured JSON arrays for API payloads or database migrations. Upload your file under the Excel to JSON tab; the utility parses column headers as JSON keys and individual rows as nested values.

2. General JSON to Excel (.xlsx)

If you have raw JSON responses from an API or webhook, paste the object array into the JSON to Excel tab. The script will automatically infer columns and compile an export-ready Excel worksheet.

3. GSTR-1 JSON to Excel for Tax Reconciliation

When downloading monthly sales returns from the GST Portal (gst.gov.in), the downloaded file is a heavily nested .json payload containing arrays like b2b, inv, and itms. Standard converters cannot flatten these correctly. Our specialized parser extracts every individual invoice item into clean columns (Receiver GSTIN, Invoice Number, Taxable Value, IGST, CGST, and SGST) for straightforward Excel audits.

4. Generating Offline GSTR-1 JSON from Excel

Skip Java runtime errors from the official GST Offline Tool. Simply format your sales register with standard invoice columns, upload it under the Excel → GSTR-1 JSON tab, and download a validated offline JSON file ready for instant portal upload.

100% Client-Side Privacy Guarantee

Commercial invoices, trade data, and customer GSTINs are strictly proprietary. This tool runs 100% client-side via JavaScript. Your files are never transmitted to external cloud servers, stored in databases, or tracked.