GSTN Error Reports Analyzer
Aggregate and decode GSTN filing error JSONs — grouped by error code
Upload one or more GSTN error report JSON files. The tool aggregates all errors, groups them by error code, shows the affected section and invoice, and lets you filter and download a clean error register.
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What is a GSTN Error Reports Analyzer?
When filing GSTR-1 or other returns through the GSTN portal or offline utility, the system returns a JSON error report listing every validation failure — invalid GSTINs, duplicate invoice numbers, missing mandatory fields, date format errors, and more. These error JSONs can contain dozens of errors across multiple sections, making them hard to read directly.
This tool reads one or more GSTN error report JSON files, extracts all error entries, groups them by error code, and presents a searchable table showing the error code, message, affected section, invoice number, and GSTIN. The grouping makes it immediately clear which types of errors are most frequent so you can fix them systematically rather than one by one.
Upload multiple error JSON files from different filing attempts — they are merged and deduplicated before display. Download the final grouped report as Excel or CSV to share with the team or ERP vendor for batch correction.
Why use this GSTN Error Reports Analyzer
Built for Indians, by Indians. Every number, every formula, every slab — tuned to FY 2026-27 reality.
Group by error code
All errors of the same type (e.g. RET191106 — invalid GSTIN) are grouped together with a count, so you see the biggest issues first.
Multi-file merge
Upload multiple error JSON files from different filing attempts. All errors are merged before grouping.
Search and filter
Filter by error code, error message, section, invoice number, or GSTIN to locate specific errors.
Download register
Export the grouped or filtered error list as .xlsx or .csv for sharing with your CA, ERP vendor, or team.
Private
All processing in your browser. Error report data never leaves your device.
Using the GSTN Error Reports Analyzer in 4 steps
No onboarding, no signup. Answer three fields and the numbers update live.
Get error JSON from GSTN
After a failed GSTR filing, download the error report JSON from the GSTN portal or from your ERP's GSTN integration. Error reports are typically named like gstr1-error-YYYYMM.json.
Upload here
Drag and drop one or more error JSON files. Multiple files are merged automatically.
Review grouped errors
Errors are displayed grouped by error code. Click a group to see all affected invoices. Use search to filter for specific GSTINs or sections.
Download and fix
Download the error register as Excel, share with your team, and fix invoices in your ERP. Re-upload corrected data to GSTN and repeat until clean.
Tips to get the most out of it
Fix errors in order of frequency — the grouped view shows the most common error codes first. Fixing one systematic error (like a wrong GSTIN format) often clears dozens of rows at once.
GSTN error codes starting with RET19 are GSTR-1 specific. RET09 errors relate to GSTR-3B. Note the error series to route issues to the right team.
After fixing errors in your ERP, re-download the error report from the next upload attempt and compare error counts to verify progress.
Keep all error JSONs and correction records as documentation. GSTN audit teams may request evidence of filing attempts and error resolution during scrutiny.
Common errors to fix in bulk: RET191106 (invalid recipient GSTIN — update vendor master), RET191108 (duplicate invoice number — de-duplicate in ERP), RET191113 (date format — standardise to DD-MM-YYYY).
Real-world scenarios
How Indians actually use this analyzer — concrete inputs, concrete outcomes.
Bulk GSTIN validation
After a failed GSTR-1 upload, the error JSON shows 50 RET191106 errors (invalid recipient GSTIN). Team uploads to the analyzer, exports the invoice list, cross-checks GSTINs against the GSTN verification portal, updates the vendor master, and re-files.
ERP integration debugging
New ERP integration generates GSTR-1 with date format errors (RET191113). Developer uploads error JSON, sees all errors are in the cdnr section with the same date format. Fixes the ERP date serializer and re-runs — zero errors on next attempt.
Monthly error trend tracking
Finance team keeps all error JSONs per period. Each month they upload to the analyzer, note the error count per code, and track whether systematic issues are being resolved by the ERP vendor over time.
Frequently Asked Questions
Still have a question? Our team replies within a business day.
After a failed GSTR filing via the offline utility or API, the response includes a JSON error report. In the GSTN offline utility, it appears in the upload response panel. Via API, it is in the response body. Download and save it before retrying.
GSTN error codes are prefixed by RET followed by numbers. RET191xxx codes are GSTR-1 invoice errors; RET09xxx are GSTR-3B summary errors. The error_message field describes the issue in plain text. Common ones: RET191106 (invalid GSTIN), RET191108 (duplicate invoice), RET191113 (invalid date).
Yes. Upload error JSONs from different periods or filing attempts — they are merged before display. Use the section filter to separate errors by period if needed.
No. This tool is an analyzer — it helps you understand and prioritise the errors. Fixes must be made in your ERP or accounting system before re-uploading to GSTN.
The tool accepts arrays of error objects, objects with an "errors" or "error_report" key containing an array, or nested objects where each key is a section containing an error array. Most GSTN error report formats are detected automatically.
Yes. All processing is in-browser JavaScript. Error report data — which may contain invoice numbers and GSTINs — never leaves your device.
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