Upload GSTR JSON Files

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Drag & Drop JSON Files Here

Upload multiple monthly GSTR-3B, GSTR-1, or GSTR-2A JSON files. The tool will consolidate them into a single Excel report.

Only standard GSTR JSON format is supported.

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Consolidated Preview

Return Information

GSTIN: Not Available
Financial Year: Not Available
Form: GSTR-3B
Months Consolidated: 0
No data parsed. Upload JSON files and click "Consolidate Files". Showing 0 rows

Consolidated Report Structure

  • Comprehensive Consolidation: Combines multiple monthly GSTR JSON files into a single Excel workbook with Meta_Data and data sheets.
  • Exact Format Preservation: The output matches the official GSTR-3B, GSTR-1, or GSTR-2A format, including all section headers and row labels.
  • Automatic Calculations: Net ITC, total tax payable, and column-wise totals are computed automatically.
  • Multi‑Month View: Each month's data appears in a separate column (GSTR-3B) or as a month column in each row (GSTR-1/GSTR-2A).
  • Zero‑Fill for Missing Values: Any field not present in a particular JSON is filled with zero.
  • Professional Styling: Dark blue headers, light blue section backgrounds, and border lines.

    • Important Notes

    This tool is designed for standard GSTR JSON exports from the GST portal. Please verify the consolidated data against original returns before filing.

    Enterprise‑Grade Data Security

  • 100% Secure Processing: All file processing happens on your own server; no data is ever sent to third parties.
  • Automatic File Cleanup: Uploaded JSON files and generated Excel reports are automatically deleted after 1 hour.
  • No Persistent Storage: We do not store any personal or financial information permanently. Files are removed immediately after download.
  • Encrypted Transmission: All communication between your browser and the server is encrypted (when using HTTPS).
  • Compliance with Indian Tax Regulations: Built with privacy‑by‑design principles.

    • Security Disclaimer

    While we employ best‑in‑class security practices, users are advised to verify the extracted data and ensure that sensitive information is handled in accordance with their organization's policies.

    Intelligent JSON‑to‑Excel Mapping

    The tool uses a sophisticated mapping engine to accurately place each JSON field into the correct cell. Key mappings include:

    • GSTR-3B: sup_details.osup_det, sup_details.osup_zero, eco_dtls, inter_sup, itc_elg, intr_ltfee, taxpayble, etc.
    • GSTR-1: b2b, b2cs, cdnr, hsn sections with all invoice-level details.
    • GSTR-2A: b2b, cdn, tcs sections with detailed invoice and note information.

    All mappings are fully documented and can be extended to support future JSON schema changes.

    Frequently Asked Questions (FAQs)

    1. What types of JSON files can I merge using this tool?

    You can merge GSTR-3B, GSTR-1, or GSTR-2A JSON files downloaded from the GST portal. The tool automatically detects the return type based on your selection.

    2. Do all JSON files need to be for the same GSTIN?

    Yes, the tool expects files from the same GSTIN. If different GSTINs are detected, you will receive an error message.

    3. How does the tool handle missing months or fields?

    Missing fields are filled with zero in the output. If a month is missing, it will not appear in the consolidated report.

    4. Will the original data in my JSON files be changed?

    No. Your uploaded files are never modified. The tool only creates a new merged Excel file, keeping all original data intact.

    5. What happens if some fields exist in one file but not in others?

    The tool creates a combined structure that includes all detected fields. If a field is missing in a particular file, the corresponding cells in the merged output will be blank or zero.

    6. Is this tool suitable for large or professional datasets?

    Yes. The tool is built for real-world business data, including multi-sheet files and large datasets. Still, users should always review the merged output before using it for reporting or compliance purposes.