CleanSheet
Your data, cleaned in one click.
Every analyst knows the pain: broken dates, duplicated headers, strange characters, extra commas, malformed rows, mixed formats, broken encodings. Excel struggles. PowerQuery breaks. Online tools can't handle real files. CleanSheet is the first macOS app built specifically to fix the exact problems analysts face every day, instantly and safely.
Product Demo / Screenshot
A workflow built for speed.
Drop in your messy file
CSV, TSV, TXT, or Excel.
Choose "Clean" or use a saved preset
CleanSheet intelligently detects what's wrong.
Review or export
Instant preview → clean Excel file → done.
What used to take 20–40 minutes now takes 5 seconds.
CleanSheet vs Everything Else
Against Excel
- ✓No formulas
- ✓No scripting
- ✓Handles huge files without freezing
- ✓Fixes dates reliably (Excel does not)
Against PowerQuery
- ✓No queries or transforms to learn
- ✓No fragile steps
- ✓50× faster for one-off fixes
- ✓Actually handles mixed formats and corrupted data
Against OpenRefine
- ✓Beautiful UI
- ✓No Java, no server
- ✓No expression language
- ✓No technical expertise required
Against Online Tools
- ✓Works offline
- ✓No file size limits
- ✓Confidential & private
- ✓Handles Excel, not just CSV
CleanSheet is the fastest, safest, most intuitive cleaner for macOS.
If your job touches data, CleanSheet is for you.
Features
Everything you need in CleanSheet
Instant Header Normalization
No more ALL CAPS, weird symbols, duplicate column names, or repeated headers halfway down the file. CleanSheet repairs all of it automatically.
Date Format Fixing
Mixed US/EU formats? Excel serial dates? Strings pretending to be dates? CleanSheet identifies and standardizes them instantly — no ambiguity, no errors.
Currency & Number Cleanup
$ signs, commas, parentheses, percentages, multi-locale decimals — all normalized with one click.
Encoding Repair
Broken characters? Weird symbols? CleanSheet automatically detects encoding problems and converts everything to clean, readable UTF-8.
Structural Repairs
Remove empty or corrupted rows, fix inconsistent row lengths, remove repeated headers, and align malformed records. The stuff Excel never fixes… CleanSheet handles effortlessly.
Saved Cleaning Recipes
Build custom workflows for recurring tasks like month-end reporting or vendor reconciliation.
Batch File Cleaning
Clean multiple CSVs and Excel files in seconds.
Before/After Preview
A simple, transparent diff showing exactly what CleanSheet changes.
Schema Normalization
Ensure each row matches the correct column layout.
Smart Type Detection
Automatically assigns column types: date, number, currency, text.
Join the Waitlist
Which problem hurts most?
Frequently Asked Questions
Does CleanSheet work offline?
Yes. 100% offline. No data is uploaded anywhere.
Does it modify my original files?
Never. A clean copy is exported separately.
What file sizes can it handle?
Most CSVs up to 250k+ rows load instantly thanks to a native engine.
Can I save recurring workflows?
Yes — create unlimited presets.
Will it support more formats?
Yes — fixed-width text and Parquet support are coming in v2.0.
Ready to get started with CleanSheet?
Join early access and be among the first to use this powerful tool.