Local-first CSV & Excel cleaner

Clean messy data in minutes — no scripts, no uploads

DataFixer scans your CSV or Excel files, finds the mess, and helps you fix it visually. Every change previews instantly and can be undone. Your data never leaves your computer.

100% offline 2,000-row preview Windows 10 / 11
DataFixer detects 4 issues in a messy orders file: extra spaces, empty rows, duplicates and mixed date formats
4 issues found — fixed in a few clicks
Why DataFixer

Messy data is a daily tax on every team

Extra spaces, duplicates, mixed date formats, inconsistent phone numbers — cleaning it by hand wastes hours every week.

Spreadsheets turn into mazes

Hand-editing columns, hunting for duplicates, and writing fragile formulas — one wrong cell and the totals silently lie.

Mess is everywhere

Leading spaces, blank rows, duplicated records, dates in ten formats, phones with and without country codes.

Scripting is overkill

Python, Pandas, awk — powerful but slow to set up, and risky when a one-off clean-up becomes a permanent pipeline.

Features

Everything you need to tame a messy file

From automatic problem detection to fine-grained manual control — cleaning is a visual, reversible workflow.

Automatic Quick Fix

DataFixer scans your file and flags extra spaces, empty rows, duplicates and mixed formats — fix what it can in one click.

Visual cleaning steps

Add steps one by one — trim, de-duplicate, fill, format, split. Each step previews instantly and can be undone (Ctrl+Z).

Format & transform

Dates, phone numbers, text case, numbers, columns and more — 18+ operations covering the clean-ups people actually need.

Before / after diff

See exactly what changed — old values struck through beside the new ones — so you never clean blind.

Export anywhere

CSV, Excel and JSON, with encoding handled for you. Save a flow and replay it on next week's file.

100% local & private

Files never leave your computer. No uploads, no cloud, no training on your data — the app works fully offline.

DataFixer start screen: drop a CSV or Excel file, try a 2,000-row sample, files never leave your computer
Private by design

Your data never leaves your computer

No sign-up, no cloud account, no uploads. DataFixer runs entirely on your machine — great for customer lists, payroll and anything you don't want in someone else's hands.

  • Works fully offline
  • Preview the first 2,000 rows instantly, operate on the full file
  • Undo any step with Ctrl+Z — nothing is destroyed
Pricing

One payment. Own it forever.

No subscriptions, no per-seat fees. Buy once, install on your own Windows machines, keep the updates.

Free

$0 forever
Try the full workflow on the sample file.
  • Core cleaning steps
  • 2,000-row sample file
  • 100% local & private
  • Pro operations & full export
Get the free version
Most popular

Pro

$39 one-time
Lifetime license · your own Windows machines · free updates.
  • All 18+ cleaning operations
  • Automatic Quick Fix
  • Unlimited export (CSV / Excel / JSON)
  • Save & replay flows
  • Lifetime license & free updates
Buy Pro — $39

Secure checkout powered by Creem. License key is delivered instantly after purchase.

FAQ

Questions, answered

How does the Pro license work?

It's a lifetime license — pay once and you keep it forever. After checkout on Creem you'll receive a license key instantly. Install the app on your own Windows machines and activate with the key.

Is my data uploaded anywhere?

No. DataFixer is 100% local — files are processed entirely on your computer and never leave it. There is no cloud, no account, and no telemetry on your data.

Which file formats are supported?

CSV, Excel (.xlsx) and JSON, including common encoding problems (GBK, UTF-8 with BOM, mixed line endings) handled automatically.

What are the system requirements?

Windows 10 or 11. The app handles large files smoothly with a fast virtual table — it previews instantly and operates on the full file.

Can I try it before buying?

Yes — the free version includes the sample workflow so you can see exactly how cleaning works before upgrading to Pro.

What about refunds?

Purchases are processed by Creem and subject to their refund policy. If something isn't right, contact support and we'll make it right.

Contact

Questions or feedback?

We read every message. Feature requests, bug reports, or questions about your license — reach out and we'll get back to you.

Email us
Prefer writing directly? gurglegurgle2026@outlook.com