CleanSheet - Clean messy CSV files in minutes

How it works

Clean data without guessing

1

Upload CSV

Select a CSV file and let CleanSheet profile its structure.

2

Review data quality

See duplicates, missing values, warnings, and trust signals.

3

Clean safely and download

Apply conservative fixes, inspect changes, then unlock the CSV.

Transparent Data Quality Analysis

Result Dashboard

A lightweight quality dashboard that shows what is safe to clean, what needs review, and why the cleaned file is worth unlocking.

Cleaned file ready

Your cleaned CSV is ready

Cleaned safely. Missing values and risky fields were not guessed.

Download PDF report

Data Trust Score --

Based on missing cells, duplicate rows, and conservative checks.

Risk Level --

Upload a CSV to calculate risk.

Cleaning Options

Choose what CleanSheet should fix

Recommended Clean Fast, safe cleanup for common CSV issues. Custom Clean Full control for professional cleanup rules.

Recommended Clean

Trims whitespace, removes fully empty rows and columns, and normalizes headers.
Removes exact duplicate rows while keeping the first copy.
Cleans currency symbols and thousand separators in safe numeric columns.
Never invents values — all missing cells are preserved exactly as they were.

Basic cleanup

Trim whitespace Remove extra spaces around text values. Remove completely empty rows Remove rows where every cell is empty. Remove completely empty columns Remove columns with no data. Normalize column headers Make column names safer and consistent.

Duplicates

Keep all duplicates Do not remove duplicate rows. Remove duplicates, keep first Keep the first copy and remove later duplicates. Remove duplicates, keep last Keep the last copy and remove earlier duplicates.

Number cleanup

Remove currency symbols Example: "$2,500" -> "2500" Remove thousand separators Example: "2,500" -> "2500" Handle percentages Example: "15%" -> "15" Convert cleaned number-like text to numeric Only safe number-like columns are converted.

Missing values

Missing value filling can change your analysis. Leave blank is safest. Mean, median, and mode should be used only when appropriate.

Numeric columns Text columns Categorical columns

Next Step

Ready to clean your file?

CleanSheet will apply safe, transparent fixes and show exactly what changed.

Safe fixes are ready.

Rows --

Columns --

Missing Cells -- -- missing ratio

Duplicate Rows --

Trust summary

Compact cleaning summary

Rows before: --
Rows after: --
Missing values preserved: --
Issues flagged: --
Cleaning mode: --

Left untouched — we never invent data

Missing values preserved as-is

Column	Missing count	Action

These cells were missing in your original file. We preserve them as-is.

What CleanSheet changed View changes applied --

Column	Change	Count	Method	Reason

Needs your review — possible data quality issues

Values that may need attention

Column	Issues found	Reason(s)

These values passed through unchanged. Review them before using the data.

Processing notes

What CleanSheet skipped safely

Safe Fix Preview

What CleanSheet can safely fix

Manual Review Warnings

What will not be blindly changed

Job ID: --

Cleaning rules

What CleanSheet does

CleanSheet focuses on practical, transparent CSV cleanup with clear reports before the final download.

Remove duplicate rows
Fix missing values conservatively
Preserve column structure
Show manual review warnings
Show change details

Pricing

Choose the right way to clean

Single files stay simple. Accounts are only needed for monthly plans because usage must be tracked.

Single File

$1

No account required
Pay only when you want to download

Monthly Pass

$5/month

Up to 20 cleaned downloads/month
Account required for usage tracking
Cancel anytime

Account required for usage tracking.

Pro

$20/month

Up to 120 cleaned downloads/month
For higher-volume CSV cleaning
Cancel anytime

Account required for usage tracking.

Data safety

Honest safeguards, clear processing

CleanSheet is built around visible reports and conservative changes, not hidden transformations.

Transparent processing

Reports show quality signals and cleaning results in plain language.

No blind changes

Ambiguous issues are shown as review notes instead of being guessed.

Payment-protected download

You can review the report before unlocking the cleaned CSV.

Secrets are managed with environment variables

Operational secrets stay out of the page and are loaded server-side.

FAQ

Common questions

Do I need an account?

No for single-file cleaning. Yes for Monthly Pass or Pro.

Can I review the report before paying?

Yes. You can analyze your CSV and review the data quality report before paying. Payment is required to unlock/download the cleaned CSV.

What does CleanSheet change?

It removes exact duplicates, fills missing values conservatively, preserves columns, and shows warnings.

What is Monthly Pass?

$5/month for up to 20 cleaned downloads/month.

What is Pro plan?

$20/month for higher-volume use, up to 120 cleaned downloads/month.

What file types are supported?

CSV for now.

Is support payment separate?

Yes. Support payments do not unlock files or subscriptions.

Your subscription is active.

No active subscription

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