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Profile, clean, and reconcile data — privately. Every tool here is free, needs no account, and gives instant results.
Leading zeros stay put and 16-digit account numbers keep every digit. Most tools silently turn 00123 into 123 and a card number into a rounded float — Reconova refuses to.
Profiling, cleaning, and matching all run on your own device, which is what makes the tool usable with payroll, invoices, and customer records.
Each step reports how many rows it changed and how many it could not process, and every export ships with an exception report listing exactly what failed and why.
Fuzzy matching shows the score behind every decision and sends genuinely ambiguous pairs to a review queue instead of guessing.
Check a payroll export against the HR system before the run
Reconcile a bank statement against your invoice ledger
Find duplicate customers in a CRM export
Validate a data migration by comparing source and target
Match a supplier's inventory file against your own SKUs
Clean a messy CSV before importing it into another system
Start with Reconova and drop the file in. The column profile tells you the nulls, duplicates, type problems, and candidate keys before you change anything.
The CSV/JSON Converter is faster for a straight conversion with no cleaning or matching involved.
Tools for people whose real job involves a spreadsheet that does not add up. Profile a file to see what is actually in it — the nulls, the duplicates, the dates in three different formats, the account numbers a previous export turned into scientific notation. Clean it with a pipeline you can inspect, undo, and re-run. Then reconcile two files against each other and find out exactly which records match, which do not, and which are too close to call. Everything runs in your browser, so a payroll export or a customer list never leaves your machine.