18 free tools · No signup · Files stay on your device

Private tools for your data, files, and spreadsheets

Compare, clean, validate, and convert CSV, Excel, JSON, and PDF files directly in your browser. Nothing is uploaded, so you can use real customer and financial data.

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Compare

Find what changed between two versions of a file

CSV & Excel Compare Added, removed, and changed rows by key
JSON Compare Structural diff that ignores key order
PDF Compare Text changes between two PDFs

Data quality

Clean, validate, and profile CSV and JSON

CSV Cleaner Fix messy import files
CSV Import Validator Check a file before you import it
Data Profiler Column types, gaps, duplicates, schema
CSV → JSON Spreadsheets to JSON arrays

Developer

Convert, format, and generate test data

JSON → TypeScript Generate interfaces from JSON
JSON → Zod Turn examples into Zod schemas
JSON Formatter Validate, pretty-print, minify
Test Data Generator Related CSV, JSON, and SQL datasets

Files & privacy

PDFs and images, processed on your device

PDF Table → CSV/Excel Pull tables out of text PDFs
PDF Metadata Remover Strip author, title, and XMP data
Photo Metadata Remover Remove EXIF and GPS location
Bulk Image Optimizer Resize, compress, convert to WebP

Business

Calculators, formulas, and spreadsheet templates

Seller Profit Calculator Fees, margin, break-even, discounts
Excel Formula Builder Build, explain, and convert formulas
Spreadsheet Templates Free business templates that calculate

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