Data Hospital · Privacy Vault · Dev-Bridge · Logic Detective · Architect. Every tool processes your spreadsheet locally — SheetJS and ExcelJS, zero bytes uploaded.
Every JAD Excel tool runs entirely in your browser. Open DevTools and watch the Network tab during processing — you'll see zero requests to any server. Your spreadsheets, formulas, and data never leave your device.
Standardize dates, convert units, strip whitespace, deduplicate, and normalize case in Excel files.
Remove leading, trailing, and redundant internal spaces from every cell in your Excel or CSV file. Browser-only, no upload.
Find and delete exact duplicate rows from Excel or CSV files. Hash-based comparison, runs entirely in your browser.
Convert text columns to UPPERCASE, lowercase, Sentence case, or Title Case in Excel or CSV files. Free, browser-local.
Detect and delete approximate duplicate rows in Excel using Levenshtein similarity scoring. Set your own threshold. Pro tier. Browser-local.
Detect and convert mixed date formats (MM/DD/YYYY, DD-Mon-YY, natural language) to ISO-8601 YYYY-MM-DD in Excel. Browser-only.
Remove rows and columns that are entirely empty from Excel or CSV files. Instant, browser-local, zero upload.
Remove non-ASCII symbols, control characters, and encoding artifacts from Excel or CSV files. Browser-local.
Drag-and-drop to reorder columns in Excel or CSV before export. Browser-local, no upload, XLSX output.
Multiply or divide numeric columns by a factor to convert units (cents→dollars, kg→lbs, metres→feet). Browser-local.
Convert 'First Name' → 'first_name', trim spaces, remove special characters from Excel headers. Free, browser-local.
Wipe metadata, redact PII, strip VBA macros, audit external links, and remove comments.
Scan and mask email addresses, phone numbers, credit card numbers, and SSNs in Excel or CSV files. Developer tier.
Wipe Author, Last Saved By, Creation Date, and Title from XLSX metadata. Browser-local, no upload.
Remove Company Name, Manager, Application Version, and AppName fields from Excel XLSX files. Browser-local, ExcelJS.
Detect and delete hidden and VBA-hidden (VeryHidden) sheets from XLSX files. Developer tier. Browser-local.
Replace every formula cell with its last-computed value. Share spreadsheets without exposing business logic. Browser-local.
Test the strength of sheet protection passwords before sharing. Uses zxcvbn for local entropy analysis. Free.
Compute SHA-256, SHA-512, and MD5 hashes of Excel files for legal chain-of-custody verification. Browser-local, free.
List all external URLs and file path references embedded in an XLSX workbook. Browser-local, Pro tier.
Remove every cell comment, note, and threaded comment from an XLSX workbook in one click. ExcelJS, browser-local.
Remove all VBA macro code from .xlsm files by extracting and deleting xl/vbaProject.bin. Output is safe .xlsx. Browser-local.
Export to Tailwind HTML tables, generate Python code, i18n JSON, SQL inserts, and Base64.
Generate TypeScript Zod validation schemas from Excel or CSV column headers and inferred types. Developer tier.
Generate PostgreSQL, MySQL, or SQLite INSERT statements from Excel or CSV data. Pro tier. Browser-local.
Convert Excel or CSV rows to a perfectly-formatted GitHub Markdown table. Browser-local. Pro tier.
Convert Excel or CSV data into a fully-styled, responsive HTML table using Tailwind CSS utility classes. Pro tier.
Generate TypeScript interface definitions from Excel or CSV column headers with inferred property types. Developer tier.
Generate a complete tRPC router with Zod schemas, TypeScript interfaces, and CRUD procedures from an Excel file. Developer tier.
Convert Excel or CSV data into self-contained SVG bar, line, and pie charts. Zero external dependencies. Pro tier.
Encode any XLSX file to a Base64 string for embedding in JSON payloads, API requests, or email attachments. Free.
Export Excel or CSV rows as Python dicts, lists, or pandas DataFrames for use in scripts and Jupyter notebooks. Pro tier.
Transform a spreadsheet with Key and language columns into i18n-ready JSON translation files for React, Vue, or Next.js. Free.
Locate formula errors, inspect type mismatches, explain formulas, and highlight hardcoded values.
Paste any Excel formula and get a plain-English breakdown of every nested function, argument, and logical step. Pro tier.
Scan every cell for #REF!, #N/A, #VALUE!, #DIV/0!, #NAME?, #NULL!, and #NUM! errors. Report with cell addresses. Free.
Trace circular reference chains in Excel workbooks using graph traversal. Pro tier. Browser-local.
Recursively trace and display all precedent cells for any target cell in an XLSX workbook. Pro tier. Browser-local.
Identify cells formatted as text that contain numeric or date values — a common source of Excel calculation errors. Free.
Color-code every cell in an Excel workbook: formula cells in one colour, hardcoded values in another. ExcelJS. Pro tier.
Run up to 1,000 iterative calculation steps to find the input value that produces a target output. Developer tier.
Analyse which sheets, named ranges, images, and data areas contribute most to your XLSX file size. Pro tier.
Join sheets, un-pivot wide data, extract with regex, split by column value, and diff two files.
Perform Left Join or Inner Join between two sheets in an Excel workbook (or two files) on a common key column. Pro tier.
Transform columns-as-variables (wide format) into rows-as-observations (long format). Required for Power BI, Tableau, and pandas. Pro tier.
Drag-and-drop pivot table builder powered by HyperFormula. Runs entirely in your browser. Developer tier.
Apply custom regular expressions to any column and extract matching substrings into new columns. Pro tier. Browser-local.
Split one Excel or CSV file into separate output files based on the unique values in a selected column. Pro tier.
Upload two Excel or CSV files and get a colour-coded diff highlighting every changed, added, and removed cell. Pro tier.
Merge two Excel datasets on approximate string similarity (Levenshtein distance) when exact key matching fails. Developer tier.
Step-by-step guides for every Excel workflow — date standardization, VBA removal, formula explanation, multi-sheet joins, and more.
Browse all guidesPro unlocks date standardization, unit conversion, formula analysis, sheet joining, range diff, VBA stripping, Python generation, and more — plus 50 MB per-job file limits.
See Pro pricing