GSTR-1 JSON Schema Validator
Validate outward supply return JSON before filing or importing it into a compliance workflow.
Use this tool when the GST portal says, "Schema Validation Failed. Download the latest version of Offline tool to generate the JSON file".
Your JSON is read by the browser and is not uploaded to Octa GST servers.
Validate your GSTR-1 JSON
Start by uploading a JSON file, or switch to paste mode if you copied the JSON from another system.
Drop your JSON file here
Drag and drop a `.json` file, or choose it from your computer. The file is read locally in your browser and validated immediately.
After upload, the selected file content appears here for review.
About GSTR-1 JSON validation
GSTR-1 is the GST return used to report outward supplies, including B2B invoices, B2C supplies, exports, credit notes, debit notes, advances, nil-rated supplies, and HSN summary details. If the JSON structure does not match the GSTN technical specification, the GST portal can reject the upload with a schema validation error.
Use this GSTR-1 JSON schema validator to check the return file locally before upload. It can help identify missing required fields, incorrect field types, invalid date or period formats, and sections that do not match the expected JSON structure.
Frequently asked questions
Is my JSON file uploaded to Octa GST?
No. The validator reads the file in your browser and runs schema validation on your device. The JSON file is not uploaded to Octa GST servers.
Is this tool free to use?
Yes. These GST JSON validation tools are absolutely free to use.
Does a valid result mean my return is ready to file?
A valid result means the JSON matches the configured schema. It does not replace tax review, GST portal validations, or business-rule checks beyond the schema.
Can I validate copied JSON instead of a file?
Yes. Switch to Paste JSON data mode, paste the complete JSON payload, and click Validate JSON.
Where do the schema rules come from?
The schema rules come from the official technical specification published by the Government GST system, GSTN. Each validator uses the corresponding GSTN JSON schema file configured in this website repository.
Can this help with the GST portal schema validation failed error?
Yes. If the GST portal shows "Schema Validation Failed. Download the latest version of Offline tool to generate the JSON file", this validator can help you identify schema-level issues in the JSON before trying the upload again.