GSTR-1 JSON Validator
Free online GST validator for India — GSTR-1 JSON upload karo, portal wali structure, format aur tax-math checks pao exact JSON-path ke saath. Safe fixes auto, corrected file download. No signup — file browser se bahar nahi jaati.
Drop your GSTR-1 JSON here, or click to browse
Exported from the GST Offline Tool · .json up to 15MB
What you'll get
This free GST validator runs a complete GST validation check on your GSTR-1 JSON before the portal ever sees it. Upload the file exported by the GST Offline Tool and get a file-health score with every error and warning listed by exact JSON path — for example b2cs.4.sply_ty or b2b.0.inv.2.val. Clicking any issue scrolls the built-in viewer to the precise line, so instead of fighting one portal rejection at a time, you fix the whole return in a single pass.
The online GST validation covers every GSTR-1 section: B2B invoices with buyer GSTINs, dates, reverse-charge flags and item-level tax math; B2CL large inter-state invoices; B2CS summaries including the ₹2.5 lakh inter-state cap; credit and debit notes (CDNR, CDNUR); exports (WPAY, WOPAY); Table-8 nil, exempt and non-GST supplies; HSN summaries; and the Table-13 document series where net issues must equal total minus cancelled. Header checks confirm your GSTIN format and return period.
Safe problems — extra spaces, lowercase codes, paise rounding, B2CS supply type derived from POS — are auto-fixed with a one-click corrected JSON download. Anything touching business identity stays manual, editable in the built-in editor with instant Recheck. Upload the corrected file on gst.gov.in yourself, and get your CA to verify before filing.
Why the GST portal rejects JSON files
- The portal compares your file field-by-field with its schema. Messages like Error in JSON structure validation or File could not be uploaded mean one or more fields do not match — an online GST validation check finds them before upload.
- Classic triggers: invalid POS codes, a supply type like INTRAB2C inside B2CS where only INTRA or INTER are allowed, invoice numbers over 16 characters, rates outside the notified list, and CGST+SGST on inter-state invoices.
- Invoice values must equal taxable value plus tax, HSN rows need valid units and rate math, and document series must satisfy net issues = total − cancelled. This GST validator India tool checks all of it.
- Hand-edited files and outdated Offline-Tool formats cause the same rejections. Validating here and downloading the corrected file fixes most cases without rebuilding the return.
- Bulk GST validator friendly: single JSON files up to 15MB — thousands of invoices — validated in seconds, free and unlimited, for sellers, accountants and CAs across India.
How this tool helps you
Portal-grade checks
Same structure, format and tax-math rules the GST portal enforces — GSTIN, period, POS, rates, intra/inter split, caps, HSN, docs.
Exact error paths
Every issue carries its JSON path. Click it and the viewer jumps to the exact line — no hunting through a 15MB file.
Safe auto-fix
Trimming, case, rounding and supply-type fixes apply automatically with a full list of what changed. Identity fields stay manual.
Bulk files welcome
Validate thousands of invoices in one JSON. Health score plus error/warning counts and a per-section filter keep big files manageable.
100% private
Everything runs in your browser — the file is never uploaded anywhere. Works offline once the page loads.
Free, no signup
Unlimited GST validation check online for every return period. No account, no payment, no watermark.
Features of this tool
Portal-grade checks
GSTIN, period, POS, rates, intra/inter tax split, B2CS 2.5L cap, HSN, docs series.
Safe auto-fix
Trim, case, rounding, sply_ty — jo safe hai wahi fix, baaki manual list.
100% private
Sab kuch tumhare browser me — file kahin upload nahi hoti.
Frequently asked questions
What is validation error in GST?
A GST validation error means some data in your return or registration form does not match the format the GST portal expects — for example a wrong state code, an invalid supply type, or tax math that does not add up. The portal blocks the upload until every error is fixed. A free online GST validator checks your GSTR-1 JSON against these same rules and shows each problem with its exact location.
What does validation error mean in GST?
It means the GST system compared your file field-by-field with its schema and found mismatches. Common triggers are an invalid POS code, a supply type like INTRAB2C inside B2CS (only INTRA or INTER are allowed there), invoice numbers longer than 16 characters, or invoice values that do not equal taxable value plus tax. Each message points at one field you must correct.
How to check validation error in GST?
Upload your JSON on gst.gov.in and the portal lists the errors, or validate before uploading: open this free GST validation online tool, drop your Offline-Tool JSON, and press Validate. You get a health score plus every error and warning with its JSON path (for example b2cs.4.sply_ty), and clicking an error jumps to the exact line in the file.
GST validation error how to rectify?
First find the exact field: validate the JSON here and note each path. Safe issues — extra spaces, lowercase codes, paise rounding — are auto-fixed and downloadable as a corrected file. For the rest, edit the value at the shown path (for example change sply_ty to INTRA or INTER, shorten the invoice number), press Recheck, and re-upload only when errors reach zero. Get your CA to verify before filing.
How to rectify validation error in GST?
Rectify it at the source field, not by re-creating the whole return. Run the file through an online GST validation check, fix each flagged path in the built-in editor, download the corrected JSON, and upload that file to the portal. If the same error repeats after correction, the mistake is usually in your accounting data (wrong GSTIN or wrong state), so verify the invoice itself.
How to clear validation error in GST?
Errors clear only when the underlying field becomes valid — there is no bypass. Validate the file, fix every ERROR item (warnings alone do not block upload), download the corrected JSON, and upload it again on the portal. Keep the corrected file as your record for that return period.
How to correct validation error in GST?
Correct the specific value the portal rejects: open the JSON in the validator editor, go to the reported path, and enter a schema-valid value — a 2-digit POS like 06, a notified tax rate like 5, 12 or 18, CGST+SGST for intra-state and IGST for inter-state. Press Recheck until the file shows zero errors, then file with the corrected download.
How to solve validation error in GST?
Solve it in three steps. One, validate the GSTR-1 JSON in this free GST validator India tool to list all errors at once instead of fixing one portal rejection at a time. Two, apply the auto-fixes and hand-correct the remaining paths. Three, re-validate to confirm zero errors and upload the corrected file. Most sellers clear bulk invoice files in a single pass this way.
What is validation error in GST registration?
During new registration it is different from return errors: it usually means your PAN details do not match CBDT records, the OTP mobile or email is unverified, or the address proof and business-place documents fail the portal checks. Re-check the ARN status message on the portal, correct that specific document or detail, and resubmit — a GSTR-1 JSON validator cannot fix registration errors.
How to check bank validation in GST portal?
This is about refund bank accounts, not returns: log in to gst.gov.in, go to Services, then Refunds, and check your bank-account validation status. Validation happens through a penny-drop check — if it fails, re-enter the correct account number and IFSC and wait for re-validation. Refund delays almost always trace back to a failed bank validation, so fix it before filing the refund application.
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