# GST tool guides for Indian businesses

Choose a task, check the supported files and follow the steps. These guides cover GST return preparation, invoice reconciliation, Tally conversion and everyday spreadsheet work.

## Prepare returns and Tally imports

Seller and Tally are separate paid tools with a 30-day trial. Check the supported outputs before you choose a plan.

[30-DAY TRIAL

### GSTR-1 preparation

Prepare supported GSTR-1 Excel and JSON drafts from sales data. Built for Indian sellers, with saved GSTINs, monthly or quarterly periods and a 30-day trial.

Read the guide](https://gstnook.in/tools/gstr-1-preparation)[30-DAY TRIAL

### Excel to Tally XML

Convert supported ecommerce sales spreadsheets into Tally voucher XML. Map CSV or Excel columns, choose ledger names and review voucher totals before download.

Read the guide](https://gstnook.in/tools/excel-to-tally)

## Free GST tools after sign-in

Compare statements, review JSON, merge spreadsheets or create an invoice. These tools remain free after a paid-tool trial expires.

[FREE WITH AN ACCOUNT

### GSTR-2B / 2A reconciliation

Compare purchase records with GSTR-2B or GSTR-2A data in your browser. Review matches, differences and missing invoices, then download an Excel report.

Read the guide](https://gstnook.in/tools/gstr-2b-reconciliation)[FREE WITH AN ACCOUNT

### GSTR-1 JSON to Excel

Make GSTR-1 JSON easier to review with a free browser-based Excel converter. Upload supported JSON or ZIP files and download readable worksheets.

Read the guide](https://gstnook.in/tools/gstr-1-json-to-excel)[FREE WITH AN ACCOUNT

### GST invoice generator

Create a printable GST invoice with rupee amounts and automatic tax calculations. Enter business, customer and line-item details, then print or save as PDF.

Read the guide](https://gstnook.in/tools/gst-invoice-generator)[FREE WITH AN ACCOUNT

### GSTR-1 JSON validator

Check supported GSTR-1 JSON fields, GSTINs and arithmetic. Review issues, edit a copy and recheck before downloading. Free with a GSTNook account.

Read the guide](https://gstnook.in/tools/gstr-1-json-validator)[FREE WITH AN ACCOUNT

### GST error report reader

Read error codes and messages from a GST portal error-report JSON or supported ZIP. Download a readable Excel review report. Free after sign-in.

Read the guide](https://gstnook.in/tools/gst-error-report)[FREE WITH AN ACCOUNT

### Merge Excel and CSV files

Combine CSV and XLSX rows into one Excel workbook with source-file labels. Review up to 50,000 merged rows in your browser. Free after sign-in.

Read the guide](https://gstnook.in/tools/merge-excel-files)

## New to GSTNook?

A few checks make the first report easier.

1. **Read the guide for your task.** Check input formats, output limits and whether a plan is required.

2. **Sign in and try sample data.** Every tool requires an account. Explore file-based tools before importing business records.

3. **Review before using an output.** Compare totals with source records and complete unsupported return sections in your existing filing workflow.

[File formats and troubleshooting](https://gstnook.in/help)[Seller and Tally plan prices](https://gstnook.in/pricing)[Service terms and supported work](https://gstnook.in/terms)

## Still have a question?

Get help with your account, a file, linked GSTINs or a payment.

[Contact support](https://gstnook.in/contact)

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Canonical page: https://gstnook.in/guides
Content updated: 2026-10-17
Publisher: GSTNook · India
Use the HTML page for interactive tools and support forms.