# LabelRefit

> Free, private, in-browser PDF label cropping and resizing utility for thermal printers (4x6 in / 100x150 mm).

LabelRefit allows e-commerce sellers and logistics workers to crop, split, and resize PDF shipping labels, box labels, and barcode sheets entirely in their browser. All PDF parsing and rendering happens locally via WebAssembly and PDF.js—files are never uploaded to any remote server.

## Core Capabilities
- **Local Browser Processing**: 100% private. Files never leave the client device. Recipient addresses, tracking numbers, and barcodes are never sent to external servers. Works offline after loading.
- **Hardware Compatibility**: Produces 100% vector-sharp PDFs calibrated for direct thermal printers including Rollo, Munbyn, Zebra, Brother, and standard 4x6 label printers.
- **Subscription-Free Alternative**: Free in-browser replacement for paid monthly plugins (e.g. ListLabelShip, ClickandLabel) and manual Adobe Acrobat snapshot cropping workflows.
- **Auto-Cropping / Content Detection**: Computer vision edge detection to identify label boundaries, ignoring receipts or blank margins.
- **Multi-Layout Splitting**:
  - Amazon FBA: Splits 2-up Letter shipping/box labels into two separate 4x6 labels.
  - Amazon FNSKU: Splits standard Avery 5160 30-up Letter barcode sheets (3 columns x 10 rows) into individual thermal printable stickers (2.25x1.25 in or 4x6 in).
  - USPS Shipping Labels: Crops top-half or left-half labels to 4x6 in.
  - eBay & Poshmark: Crops shipping labels and removes customer receipts.
- **Output Formats**:
  - 4 x 6 in (101.6 x 152.4 mm) - Standard thermal shipping label
  - 100 x 150 mm - Standard European/metric thermal label
  - 2.25 x 1.25 in (57.15 x 31.75 mm) - Standard FNSKU / item barcode sticker
- **Batch Processing**: Up to 50 files, 100 MiB total, 300 input pages, 500 output pages per batch.

## Available Web Tools
- [General 4x6 Label Resizer](https://labelrefit.com/): Interactive PDF label cropper and resizer for all carriers.
- [Amazon FBA Box Label to 4x6](https://labelrefit.com/amazon-fba-label-to-4x6): Split 2-up FBA box labels into thermal 4x6 format.
- [Amazon FNSKU 30-Up to Thermal](https://labelrefit.com/fnsku-30-up-to-thermal): Convert 30-up Avery 5160 barcode sheets into individual thermal labels.
- [eBay & Poshmark Label Cropper](https://labelrefit.com/ebay-poshmark-label-cropper): Extract shipping labels from eBay/Poshmark PDFs.
- [USPS Shipping Label to 4x6 Converter](https://labelrefit.com/usps-label-to-4x6-converter): Format top-half and left-half USPS labels for thermal printers.

## Internationalization
Supports 12 languages with native path routing:
- English: https://labelrefit.com/
- Simplified Chinese (简体中文): https://labelrefit.com/zh-hans
- Traditional Chinese (繁體中文): https://labelrefit.com/zh-hant
- German (Deutsch): https://labelrefit.com/de
- French (Français): https://labelrefit.com/fr
- Spanish (Español): https://labelrefit.com/es
- Italian (Italiano): https://labelrefit.com/it
- Portuguese (Português Brasil): https://labelrefit.com/pt-br
- Dutch (Nederlands): https://labelrefit.com/nl
- Polish (Polski): https://labelrefit.com/pl
- Japanese (日本語): https://labelrefit.com/ja
- Korean (한국어): https://labelrefit.com/ko