refynr.
Clean spreadsheets you can actually trust.
refynr spots the mess in your data — inconsistent formats, duplicates, broken postcodes and phone numbers, stray whitespace — and proposes a fix for each one. You review every change and export a clean copy. Nothing is ever altered behind your back.
Paste data or upload a spreadsheet
Everything runs in your browser — your data never leaves this device.
How it works
From messy paste to clean export in under a minute
Paste or upload
Drop in a CSV or Excel file, or paste straight from Excel or Google Sheets. It's analysed on your device — no upload, no waiting.
See what's wrong
Get a data-health score and an itemised list of findings. Every issue is explained in plain English, so you know why it matters.
Review & export
Accept fixes one by one and watch the score climb. Download a clean copy as CSV or Excel — your original file is untouched.
What refynr catches
Deterministic fixes you review, one by one
Non-destructive by design
Every change is a reviewable patch with a before, after and reason. The engine never edits your input — it only ever builds a clean copy.
Private by default
Cleansing runs 100% in your browser. Your rows never leave your device — there's no upload, and nothing is sent to any server.
UK formats, done right
Postcodes and phone numbers validated to UK standards — the details US-centric tools get wrong on British data.
The everyday mess
Stray whitespace, inconsistent casing, mixed date formats, duplicate rows, blank cells, mojibake encoding, malformed emails and numbers — normalised automatically.
A health score that means something
One deterministic score across consistency, completeness, uniqueness and validity — with the exact gain you'd get if you accepted every fix.
Advisory, never reckless
If a value can't be fixed with confidence — an impossible date, an invalid email — refynr flags it for you to decide. It never guesses.
Why not just use AI in Excel?
The cell assistants rewrite your data. refynr shows its working.
In-cell AI (Copilot, GPT-in-Sheets)
- ✗ Sends your rows to a cloud model
- ✗ Edits cells in place — the original is gone
- ✗ You trust the change; you can't inspect the rule
- ✗ Every run can differ
refynr
- ✓ Runs locally — your rows never leave the tab
- ✓ Builds a clean copy; your original is untouched
- ✓ Every change is a patch with a reason you can read
- ✓ Deterministic — same input, same result, every time
Your data stays yours
Most cleaning tools upload your spreadsheet to a server. refynr doesn't. The entire analysis and repair happens locally, in this browser tab. There's no file to leak and nothing to delete afterwards — because your data never left in the first place.