GSTR Auto Downloader is a browser extension that helps you bulk-download your own filed GST returns (GSTR-1 JSON, GSTR-2B Excel, GSTR-3B) from the GST portal and consolidate them into Excel workbooks.
The short version
Everything happens on your computer. Nothing is collected, transmitted, sold, or shared. There are no servers, no analytics, no tracking, and no accounts.
What the extension does with data
GST portal pages. The extension clicks buttons and reads pages only on gst.gov.in, only in the browser tab where you are already logged in, and only when you press a button in its popup. It cannot see any other website.
Your login. The extension never sees, asks for, or stores your username, password, or OTP. You always log in yourself. It never solves captchas.
Downloaded returns. Files are saved to your browser's normal Downloads folder. A copy of each downloaded return is kept in the extension's local storage (IndexedDB, inside your browser profile on your computer) so the Consolidate feature can merge months without you re-selecting files. These copies are tagged with the GSTIN and return period, are not encrypted (they sit inside your browser profile like any other site data), and are kept until you remove them. Delete them at any time from the Consolidate page ("Clear kept files" per client, or "Clear everything kept"), or by removing the extension. On a shared computer, use separate browser profiles per person and clear kept files when a client's work is done.
Run log. The popup keeps a log of the last run (step outcomes, portal button texts, file names) in the extension's local storage so it can be shown after the popup is reopened. "Copy diagnostic log" masks GSTINs, ARNs and file paths before copying. The log is cleared with "Back" in the popup or "Clear everything kept" on the Consolidate page.
File access. If you enable Chrome/Edge's "Allow access to file URLs" setting, the extension reads back the files it just downloaded (to keep the consolidation copy). It does not scan, browse, or read any other files.
Consolidated workbooks. Built entirely inside your browser and saved to your Downloads folder.
What the extension does NOT do
It does not send any data to the developer or to any third party.
It does not use analytics, telemetry, error reporting, or cookies.
It does not load any remote code. All code ships inside the extension package and is reviewed by the browser store.
It does not require an account or registration.
Permissions, in plain words
Permission
Why it is needed
Access to gst.gov.in
To click the portal's own buttons in your logged-in tab and download your returns.
Downloads
To name the downloaded files by return period (e.g. GSTR1_062026) and know when a download finishes.
Storage
To keep run progress and the local copies used by Consolidate - on your computer only.
Alarms
To run STEP 2 automatically ~18 minutes after STEP 1, and to refresh the portal dashboard every few minutes meanwhile so your session does not time out.
Scripting
To operate the portal page (select the period, click Search/Generate/Download) in your own tab.
File URLs (optional, off by default)
To read back the files the extension itself just downloaded, for consolidation. Controlled by you in the browser's extension settings.
Disclaimer
This is an independent tool. It is not affiliated with, endorsed by, or connected to GSTN, the GST portal, or the Government of India. Figures the extension reads from portal pages (GSTR-3B summaries) are a convenience copy - always verify against the official PDF before relying on them.
Changes and contact
If this policy changes, the updated version will be published at the same address with a new date. Questions or concerns: use the support contact on the extension's store listing.