Guides
Use these pages to understand fields, rules, and common failure points. When the file is ready, each guide points to a workflow or tool for the actual check.
Information guide
How to read an accounts receivable aging report
Understand Current, 1-30, 31-60, 61-90, and 91+ aging buckets, separate credits from overdue invoices, and prepare a reliable open-invoice CSV.
Next: Free AR Aging Report Generator from CSV
Information guide
How to randomize a list fairly
Learn how Fisher-Yates shuffling, Web Crypto random positions, duplicate entries, sampling without replacement, and draw records affect a random list.
Next: List Randomizer: Shuffle a List or Pick Random Items
Information guide
What to include in a home inventory spreadsheet
Learn the practical columns, room-by-room process, photo and receipt notes, backup routine, and valuation boundaries for a useful home inventory.
Next: Free Home Inventory Spreadsheet Template
Information guide
Amazon flat file upload fields and common errors
Understand which SKU, price, quantity, image URL, and update-action fields usually cause Amazon inventory upload errors.
Next: Amazon Listing Upload Preflight
Information guide
Amazon parent-child variation file rules explained
Learn how parent rows, child rows, parent SKU references, variation themes, and option combinations should line up before upload.
Next: Amazon Listing Upload Preflight
Information guide
Amazon product image requirements before upload
Review the image dimensions, file type, zoom readiness, transparency, and main-image background issues that can affect Amazon listings.
Next: Amazon Listing Upload Preflight
Information guide
Amazon FBA box content file errors explained
Understand the missing SKU, invalid box number, quantity, duplicate row, and expected-total issues that make FBA box content files risky.
Next: Amazon FBA Profit and Shipment Check
Information guide
Shopify inventory CSV columns and supplier stock checks
Learn which Shopify inventory columns, supplier SKU fields, and quantity exceptions matter before updating stock from a CSV.
Next: Shopify Inventory CSV Update
Information guide
Shopify product CSV import fields and common errors
Understand product CSV header, handle, SKU, variant, price, status, and image URL risks before importing products into Shopify.
Next: Shopify Product CSV Import Check
Information guide
Shopify SKU and variant duplicate rules before import
Learn how duplicate SKUs, blank SKUs, repeated option combinations, and inconsistent option names affect Shopify product CSV imports.
Next: Shopify Product CSV Import Check
Information guide
Shopify CSV header mapping rules for import files
Understand how supplier, old-store, CRM, or spreadsheet columns should map into Shopify product, inventory, or customer templates.
Next: Shopify Product CSV Import Check
Information guide
Shopify customer CSV fields, consent, and duplicate risks
Understand customer email, name, phone, consent, duplicate, and blank-field issues before importing customers into Shopify.
Next: Shopify Customer CSV Import Cleanup
Information guide
CSV to JSON structure for automation data
Understand how headers, empty rows, quoted cells, and repeated columns affect JSON records generated from spreadsheet exports.
Next: CSV and JSON Data Cleanup and Handoff
Information guide
API JSON to CSV structure for spreadsheet review
Understand how JSON arrays, object keys, nested values, and missing fields affect spreadsheet-ready CSV output.
Next: CSV and JSON Data Cleanup and Handoff
Information guide
PDF upload preflight metadata checks
Understand which local PDF metadata, page-size, file-size, and page-count details should be checked before upload or delivery.
Next: PDF Page Size Inspector