I will clean and merge CSV or excel files with a validation report

China

I speak English

Freelance builder using Claude Code and Codex

I build small, runnable software with Claude Code and Codex. I help with focused feature changes, bug fixes, unit or integration tests, lightweight AI agents, and local automation scripts. I keep scop...
About this Gig

Messy exports or inconsistent spreadsheets? I will clean and merge your CSV or Excel data using rules we agree on before work begins.


What I do:

- Trim whitespace and standardize formats

- Unify column names

- Remove exact duplicates by a key you confirm

- Merge files with compatible structures

- Check required fields and flag problems instead of guessing


What you get:

- The cleaned file (CSV or Excel, your choice)

- An exceptions list for anything ambiguous - I flag it, I don't guess

- A short validation summary showing exactly what changed: rows in, rows removed, rows out


Example of the summary:

Input: 1,000 rows. Removed 48 duplicates by customer_id. Output: 952 rows.

12 ambiguous dates flagged, not changed. Leading zeros preserved. Your source files are never overwritten.


This Gig covers data values in tables only. It does not include scraping, research, macros, dashboards, or complex formulas.


How to start: message me with an anonymized sample, the number of files and rows, and the output format you need. I'll confirm the scope and price before you order.


One revision within the agreed scope is included. New files or new requirements get a separate quote.