# E-Cropper Complete Technical Documentation & Context for LLMs

> High-performance browser-native shipping label processing, SKU mapping, batch sorting, and picklist generation platform for Indian ecommerce sellers.

## Overview
[E-Cropper](https://www.ecropper.in) is an online utility engineered specifically for Indian ecommerce merchants selling on Flipkart, Meesho, Amazon India, Glowroad, Ajio, Myntra, and Snapdeal.

When sellers download order manifests or dispatch documents from marketplace portals, the file is usually an A4-sized PDF that combines the buyer shipping label (with barcodes/routing codes) and a tax invoice / pack slip on the same page. Printing these directly on 4x6 inch thermal barcode printers results in tiny, unreadable barcodes or wasted paper.

E-Cropper solves this by automating:
1. Identifying exact bounding coordinates of the courier label.
2. Cropping away invoices, return slips, and unused white space.
3. Resizing and orienting the cropped label into standard 4x6 inch (100x150 mm) dimensions.
4. Parsing embedded text layers or executing OCR to identify the item's SKU, size, and quantity.
5. Overlaying clear human-readable SKU labels onto the thermal label.
6. Merging all processed pages into a single high-speed thermal printable PDF.

## E-Cropper Pro Architecture & Features (High-Volume Sellers)
Beyond basic label cropping, E-Cropper includes an advanced Pro suite for warehouse operations and high-volume dispatch:

### 1. Automated SKU Mapping
- **Links**: [SKU Mapping Dashboard](https://www.ecropper.in/mapping-dashboard) | [Bulk SKU Upload](https://www.ecropper.in/bulk-upload-sku) | [SKU Manager](https://www.ecropper.in/sku-manager)
- **Problem Solved**: Marketplaces often shorten, truncate, or alter product titles into confusing seller SKUs that warehouse packers cannot recognize.
- **How It Works**: Sellers can maintain an internal SKU mapping table (via a visual dashboard or bulk Excel/CSV file upload). When PDFs are processed, E-Cropper automatically replaces the marketplace title with the seller's standardized internal warehouse SKU and barcode.

### 2. Multi-Order Batch Sorting Engine
- **Links**: [Sorting Results & 3-Tier SKU Hierarchy Demo](https://www.ecropper.in/sorting-results) | [Pro Multi-Platform Label Cropper](https://www.ecropper.in/pro-label-crop) | [Pro Flipkart Label Cropper](https://www.ecropper.in/pro-flipkart-label-crop)
- **Problem Solved**: Default marketplace manifests group labels arbitrarily by order time, forcing warehouse staff to run across aisles to pick items.
- **How It Works**: E-Cropper Pro re-sequences labels in the output PDF by SKU, product variation, and size (e.g., all "Black T-Shirt Size L" labels are printed together), drastically cutting picking time by up to 70%.

### 3. Instant Warehouse Picklist PDF Generator
- **How It Works**: Simultaneously generates a consolidated A4 picklist alongside the 4x6 label PDF. The picklist summarizes total units required per SKU, item variants, and shelf bins, enabling fast batch picking and zero-error order verification.

### 4. Multi-Shop & Brand Management
- **Link**: [Shops & Brand Management](https://www.ecropper.in/shops-brand)
- Allows multi-channel merchants to manage separate shops, seller IDs, and brands with custom prefix/pack rules.

## Platform Specifications & Tools

### 1. [Flipkart Label Cropper](https://www.ecropper.in/crop/flipkart)
- **Input**: Flipkart Seller Hub order PDFs (both Single Order and Multi-Order manifests).
- **Processing**: Extracts the top shipping label portion containing the eKart logistics barcode, tracking number, and customer address. Simultaneously parses the invoice table to extract the Product Title, SKU, Size, and Order Quantity.
- **Output**: 4x6 inch 203/300 DPI vector PDF.

### 2. [Meesho Label Cropper](https://www.ecropper.in/crop/meesho)
- **Input**: Meesho Supplier Panel dispatch PDFs.
- **Processing**: Crops the Meesho courier label (Delhivery, Shadowfax, Xpressbees, Valmo, Ecom Express), extracts the Supplier SKU, and formats the label for direct thermal output.
- **Output**: 4x6 inch 203/300 DPI vector PDF.

### 3. [Amazon Label Cropper](https://www.ecropper.in/crop/amazon)
- **Input**: Amazon Seller Central Easy Ship & Self Ship label PDFs.
- **Processing**: Extracts the Amazon Shipping label, carrier barcode, routing code, and Amazon Order ID.
- **Output**: Standard 4x6 inch format.

### 4. Other Marketplace Croppers
- [Glowroad Label Cropper](https://www.ecropper.in/crop/glowroad): Standardized 4x6 cropping for Glowroad supplier manifests.
- [Ajio Label Cropper](https://www.ecropper.in/crop/ajio): Ajio marketplace invoice separation and barcode cropping.
- [Myntra Label Cropper](https://www.ecropper.in/crop/myntra): Myntra logistics label optimization.
- [Snapdeal Label Cropper](https://www.ecropper.in/crop/snapdeal): Snapdeal order manifest shipping label extractor.
- [All Tools Directory](https://www.ecropper.in/tools): Complete listing of all shipping utilities.
- [Upgrade & Pro Plans](https://www.ecropper.in/upgrade): Pricing and pro feature activation.

## Privacy and Security Guarantee
- **Local WebAssembly Execution**: All PDF manipulation is executed directly in the browser's JavaScript V8/SpiderMonkey engine utilizing client-side PDF libraries (pdf-lib, pdf.js, Tesseract.js).
- **Zero Server Uploads**: The seller's PDF files, customer names, delivery addresses, phone numbers, and order values are never transmitted over the network to any backend server.
- **Offline Capable**: Once the page is loaded, label cropping works even without continuous internet access.

## Thermal Printer Compatibility
Output files are universally compatible with all direct thermal and thermal transfer barcode label printers:
- TSC (TTP-244 Pro, DA200, DA210, TE244)
- Zebra (ZD220, ZD230, GK420d, ZT230)
- Xprinter (XP-420B, XP-460B, XP-470B)
- TVS Electronics (LP 46 Neo, LP 44)
- Rollo Thermal Printer
- HPRT (SL42, Prime)
- Citizen, Datamax, Honeywell thermal printers.