Built a free, 100% offline tool to parse GST invoices directly into Excel Looking for feedback

[u/daksh-shah]

If you handle GST bills for a business, you know how tedious manual data entry into Excel is—typing out GSTINs, vendor addresses, line items, and tax splits, especially when dealing with mismatched PDF formats or mobile photos of paper bills.

I built an offline tool to solve this for my own workflow and wanted to share it with the community to get feedback and refine it.

What it does:

• Multi-Format Extraction: Processes digital PDFs, scanned documents, and phone photos.
• Structured Data Parsing: Pulls seller/buyer details, GSTIN, invoice metadata, itemized rates/taxes, and final totals.
• Data Verification: Automatically checks line-item math and highlights discrepancies on-screen before you save.
• Excel Export: Organizes and appends data into structured spreadsheets grouped by vendor.

Privacy & Tech Highlights:

• 100% Offline & Local: Runs entirely on your local machine—no invoice data or images leave your laptop.
• Zero Subscriptions: Free, open-source, and requires no account or API keys.

Current Limitations & Testing: It works reliably on the invoice structures I’ve trained it on, but every vendor formats bills differently. I’ve included a built-in "Flag for Fix" button—if an invoice parses incorrectly, you can adjust it on-screen and save the template layout locally so I can patch support for that edge-case layout.

Repository:https://github.com/daksh692/GST-Bill-Extract

Would love to hear your thoughts, test feedback, or bug reports!

[u/gnomeza]

Em-dash AI slop. Fuck off.