Free tools for your spreadsheets.

Pick what you need

• What's inside this Excel file? — a plain-language overview of every sheet and column before you dig in.
• Why are my formulas showing errors? — find the #REF!, #DIV/0! and other broken formulas in your workbook.
• Convert Excel to CSV? — turn a sheet into a clean .csv any tool can read.
• How do I remove duplicate rows? — drop the repeated rows and keep the first of each.
• Does this Excel file have macros? Is it safe? — check for VBA macros and links to other files before you open or share it.
• What changed between two Excel files? — see every cell that changed, was added, or was removed between two versions.
• How do I fix broken links to other files? — freeze references to moved or deleted workbooks so your cells stop breaking.
• How do I clean up a messy export? — trim spaces, fix numbers stored as text, drop duplicate rows, and standardize inconsistent values.
• How do I summarize or total up my data? — get the total, average and range of every numeric column, and the counts of every column.
• How do I remove personal data before sharing? — mask emails, phone numbers, IDs and card/bank numbers, and download a safe copy.
• How do I pull out just the rows I need? — keep the rows that match your conditions (AND), sort them, and download the result as CSV.
• How do I get this ready to send safely? — scan six leak vectors in one pass, clean personal data, metadata, comments and macros, and flag hidden sheets and external links for your review.
• Run any tool on your file — the advanced surface: pick any file tool our API exposes, fill in its options, and run it — the exact tool an AI agent calls.
• Convert a product spreadsheet to a Shopify import CSV — map your product list to Shopify's import format and download a reviewed CSV.
• Import Shopify collections from a CSV — map your collections list to Shopify's import format and download a reviewed CSV.
• Update Shopify inventory from a CSV — map SKUs and quantities to Shopify's inventory import and see what changes before you import.
• Import Shopify URL redirects from a CSV — map your old and new paths to Shopify's redirect import and flag the malformed rows.
• Fix a broken Shopify products export CSV — repair a broken Shopify products export so it imports cleanly — encoding, headers, prices, duplicate handles.

Send your Shopify catalog to a marketplace

• Turn a Shopify products export into an Amazon feed — map titles, prices, and identifiers into Amazon's flat-file template; products without an identifier are listed, never guessed.
• Turn a Shopify products export into a Google Shopping feed — add your store domain and currency and get a Google Merchant Center product feed; excluded products are listed with reasons.
• Turn a Shopify products export into an eBay feed — map each product type to an eBay category and get a File Exchange feed; unmapped types are listed, never guessed.
• Turn a Shopify orders export into a UPS WorldShip batch — one shipment row per order, ready to import and print labels; orders without a shippable address are listed.

More tools are on the way.

How these tools work

Each tool runs the same function your AI agent would call through our API — no reformatting, no surprises. Prefer to skip the upload entirely? Install xlsx-for-ai and ask Claude or Cursor to do any of this on your own machine, with no file ever leaving it.