Ecommerce tools
Check Amazon and Shopify files before upload.
Featured toolAmazon flat file preflightBrowser tools for practical files
Free tools to make files ready.
Check, clean, convert, and export the work in front of you.
Core file processing stays in your browser. No account required.
Start with a category
What are you working on?
Image tools
Inspect, resize, compress, crop, and clean images.
Featured toolBatch image size inspectorCSV & data tools
Clean, compare, split, and convert structured files.
Featured toolCSV diff by keyHome tools
Create inventories, moving lists, labels, and calendars.
Featured toolHome inventory spreadsheetAll tools
Browse every published checker, converter, and utility.
Featured toolList randomizerQuick access
Quick picks
Amazon flat file preflightFind listing blockers before upload.Shopify product CSV checkReview headers, handles, and variant rows.Batch image size inspectorCheck dimensions and file sizes together.Batch image compressorReduce image size toward a chosen target.Home inventory spreadsheetBuild an editable room-by-room inventory.CSV diff by keyCompare two CSV files by a stable column.AR aging reportTurn open invoices into aging buckets.List randomizerShuffle a list or pick random entries.Shopify stock CSV builderPrepare inventory quantity updates.Amazon FBA profit calculatorEstimate margin before sending inventory.PDF page size inspectorCheck page count, dimensions, and file size.Split CSVBreak a large CSV into smaller files.