GSTR-1 Excel ⇄ JSON Converter
Convert GSTR-1 Excel to JSON for the GST portal, read a client's JSON file, or download it back as Excel — instantly, right in your browser.
Updated June 2026
Drag and drop an XLSX or JSON file here, or click to select a file
(Only .xlsx and .json files up to 15MB are accepted)
What this GSTR-1 tool does
Excel → JSON
Convert a GSTR-1 Excel file to JSON, ready to upload on the GST portal.
JSON → Excel
Turn a GSTR-1 JSON file back into a clean, readable Excel workbook.
Merge files
Combine data from multiple GSTR-1 JSON or Excel files into one.
Latest V3.2 format
Supports the newest V3.2 GSTR-1 Excel format out of the box.
Uses of this tool
A faster, easier alternative to the GST offline tool, built for the latest V3.2 format. GSTR-1 is due by the 11th of the next month — or the 13th after the quarter under QRMP — on the official GST portal. Download the GSTR-1 Excel format.
- Convert a GSTR-1 Excel file to JSON for uploading on the GST portal.
- See data of a GSTR-1 JSON file shared by your client.
- See data of a GSTR-1 JSON file downloaded from the GST portal.
- Convert a GSTR-1 JSON file to Excel.
- Merge data of multiple GSTR-1 JSON or Excel files.
How to use the tool
- 1Upload xlsx or json files. You can also upload more than one file at the same time.
- 2A list of all sections (sheets in Excel) will be shown in tables.
- 3Click any section to see its data in a table, along with a summary of that section.
- 4Click Download Excel to download an Excel file with all the sections.
- 5Click Download JSON, enter your GSTIN and select the period in the popup, then download the JSON file to upload on the GST portal.
How to download JSON files from the GST portal
- 1Log in to the GST portal.
- 2Click on Return Dashboard.
- 3Select financial year, quarter and then month. For quarterly GSTR-1, select the last month of the quarter.
- 4Click the download button in the GSTR-1 section.
- 5Click "Generate JSON file to Download". The JSON file is generated and available for download within about 20 minutes. To download several JSON files at once, use a Chrome extension like TaxTribute GST Assistant or XLSDeal.
Frequently asked questions
Is the Finexo GSTR-1 tool free?
Yes. The GSTR-1 Excel ⇄ JSON converter is 100% free with no sign-up and no usage limits. Everything runs in your browser, so your data is never uploaded to a server.
How do I convert a GSTR-1 Excel file to JSON?
Upload your GSTR-1 Excel (.xlsx) file, review the sections shown in tables, then click Download JSON. Enter your GSTIN, select the return period, and download the JSON file ready to upload on the GST portal.
Can I convert a GSTR-1 JSON file back to Excel?
Yes. Upload a GSTR-1 JSON file — whether downloaded from the GST portal or shared by a client — and click Download Excel to get a clean, readable workbook of all sections.
Does the tool support the latest V3.2 GSTR-1 format?
Yes. The tool supports the newest V3.2 GSTR-1 Excel format out of the box, so your converted files match the current GST portal requirements.
Is my GSTR-1 data safe?
Yes. All conversion happens locally in your browser. Your GSTR-1 files are never uploaded to or stored on any server.
What is the due date for filing GSTR-1?
GSTR-1 is due by the 11th of the following month for monthly filers, and by the 13th of the month after the quarter for taxpayers under the QRMP scheme. Convert your Excel to JSON with this tool and upload it on the GST portal before the deadline.
Why does my GSTR-1 JSON fail to upload on the GST portal?
Upload errors usually come from an outdated Excel format, an incorrect GSTIN, or the wrong return period. This tool supports the latest V3.2 GSTR-1 format and lets you set the GSTIN and period before download, so the generated JSON matches the portal's current requirements.
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