Clean, Transform & Visualize Your Own Spreadsheets
| Customer_Name | Customer_Email | Amount | Marked Issue / What's Wrong |
|---|
Spreadsheet Cleaning, Format Conversion & Charting in Your Browser
Every module executes locally on the files and tables you provide, using native JavaScript arrays, FileReader streams, and HTML5 Canvas rendering.
Smart Hygiene Engine
Trim leading, trailing, and duplicate internal whitespace first, prune blank records, standardize Title Case names, repair emails, and remove duplicate rows in exact sequence.
Instant SQL, JSON & Markdown Generator
Automatically infer column data types (INT, DECIMAL, VARCHAR) from your uploaded data and generate SQL INSERT scripts, JSON arrays, or Markdown tables.
Visual Chart Studio & PNG Export
Group and aggregate any column from your sheet by Sum, Average, Count, or Max. Switch seamlessly between Bar, Line, Doughnut, and Polar charts and download high-res PNGs.
Inline Cell Editing & Whitespace Radar
Spot untrimmed spaces (`␣`), empty fields, or invalid emails with live visual badges. Click or Tab across any cell to edit values directly with full Undo/Redo history.
Verified User Dashboard & Dataset Vault
Create a verified workspace account to save your own cleaned dataset snapshots, review your personal audit log, and reload your saved tables in one click.
Local Browser Execution
All CSV parsing, deduplication, diff previewing, and SQL/JSON generation run locally inside your browser tab using standard client-side JavaScript.
Manual Spreadsheet Cleanup Time Calculator
Use the sliders below to calculate annual hours and time cost based on your own weekly file volume, minutes per file, and hourly rate.
Simple arithmetic estimate (annual hours × hourly rate input).
Data Cleaner Studio
example_customer_orders.csv (Interactive Example) Public Demo Mode • Sign Up to Upload Your Own FileEvery error in the example below is marked with a red/amber badge showing what needs correction. Click Magic 1-Click Auto-Clean All to fix them, or sign in to upload your own CSV.
1) Trims spaces & tabs → 2) Removes completely empty rows → 3) Fixes Title Case → 4) Repairs emails → 5) Strips currency symbols → 6) Removes duplicate rows.
Granular Cleaning Operations
Click to applyBatch Find & Replace
Preview Pending Row & Cell Changes
Inspect every cell and row change below before applying. You can also undo with 1 click after applying.
| Row # | Column | Current Value (Before) | New Value (After) | Reason / Rule |
|---|
Your Workspace Starts Clean & Empty
Drag and drop your `.csv` or `.tsv` file here, paste your own raw spreadsheet rows, or initialize a custom blank sheet with your own columns.
Column Profiler, Pivot Matrix & Formula Lab
example_customer_orders.csvInspect per-column data types, null rates, uniqueness, quartiles, and standard deviation, build 2D cross-tab pivot tables, or derive new columns directly into your active sheet.
1. Automated Column Schema & Quality Profiler
Live statistical distribution, inferred SQL/JSON type, cardinality, primary-key readiness, and numeric quartiles (Min, Max, Mean, Median, σ).
2. Interactive 2D Pivot Table & Cross-Tab Matrix
Cross-tabulate any Row Dimension against any Column Dimension with automatic row, column, and grand totals.
3. Derived Column & Extraction Lab
Generate a new calculated or extracted column and append it directly to your active Studio dataset (with 1-click Undo).
Instant Multi-Format Converter
Transform your active Studio dataset into production SQL, JSON, Markdown, HTML, or custom-delimited CSV.
1. Select Output Format
2. Generator Settings
Visual Chart & Statistical Studio
Aggregate your uploaded dataset by category and metric, customize chart styles, and export high-resolution PNG visuals.
Aggregated Metric Visualization
Interactive CanvasGrouped Breakdown Table
| Category | Value | Share |
|---|
Not Signed In
✓ Local Profile Active BROWSER STORAGE— • Workspace: —
Your Saved Dataset Snapshots
Every table you save from the Studio appears here. Click Load in Studio to edit or export.
| Dataset Name | Rows × Cols | Health | Saved At | Actions |
|---|
Workspace Preferences
Your Activity Log
Create Your Account
Create an account and confirm ownership of your email address using a real confirmation email.
A confirmation email has been requested for . Open the email and click its confirmation link. This app does not generate or display verification codes.
Client-Side Processing & Data Integrity Specification
How CleanSheet Studio parses, previews, cleans, and stores spreadsheet data in your browser, along with storage limitations.
100% In-Memory Execution
Files are parsed directly inside the browser using the HTML5 FileReader API and RFC-4180 compliant CSV tokenization. Spreadsheet files are read locally in browser memory via FileReader without being uploaded to an application server (UI fonts and chart scripts load via standard CDN).
6-Stage Ordered Sanitization
Magic Auto-Clean executes in strict deterministic order: whitespace normalization first, empty record pruning second, Title Case & email repair third, currency sanitization fourth, and smart row deduplication last.
Unencrypted Local Snapshots
Saved dashboard snapshots and account profiles are stored in standard browser localStorage on this device. Because browser storage is not encrypted at rest, avoid saving sensitive data on shared computers.
Technical Processing & Storage Summary
Application: CleanSheet Studio — Client-Side Spreadsheet Cleaner & Converter
Execution Environment: Local Browser JavaScript (HTML5 FileReader + Canvas)
Storage Mechanism: Standard browser localStorage (unencrypted client-side storage; clearable anytime)
Data Integrity & Pipeline Capabilities:
- RFC-4180 State-Machine Parser: Preserves quoted commas, escaped quotes (""), and multiline fields inside quotes.
- Type-Safe Identifiers & Nulls: Preserves leading-zero identifiers (e.g. ZIP codes 00501) as strings and exports empty numeric cells as null/NULL rather than 0.
- Transformation Diff Preview & Undo: Shows exact row/cell before-and-after values prior to applying changes, backed by a multi-step Undo stack.
Terms of Use
Effective Date: October 2026 • CleanSheet Studio Client-Side Application
1. Acceptance of Terms
By accessing and using CleanSheet Studio, you agree to be bound by these Terms of Use. CleanSheet Studio is a browser-based utility for inspecting, cleaning, profiling, and converting tabular spreadsheet files (CSV/TSV).
2. User Data Ownership & Responsibility
You retain 100% ownership, copyright, and responsibility for any datasets, spreadsheets, or text you upload, paste, modify, or export. The built-in demonstration dataset (example_customer_orders.csv) is synthetic sample data provided solely to illustrate error marking and cleaning operations.
3. “As-Is” Software & Verification Requirement
CleanSheet Studio is provided on an “as is” and “as available” basis without warranties of any kind, whether express or implied. Automated data cleaning operations (whitespace trimming, Title Case conversion, email syntax repair, number sanitization, and duplicate removal) are rule-based utilities. You are solely responsible for reviewing the Transformation Preview diff and verifying all exported CSV, JSON, SQL, and chart outputs before using them in financial, legal, operational, or production environments.
4. Limitation of Liability
In no event shall CleanSheet Studio or its contributors be liable for any direct, indirect, incidental, or consequential damages (including loss of data, business interruption, or reporting inaccuracies) arising out of the use or inability to use this software.
About Us
Built for transparent, deterministic client-side spreadsheet hygiene and analytics
Our Mission
CleanSheet Studio was built to solve a daily headache for analysts, developers, and operations teams: cleaning messy CSV exports from CRMs, billing systems, and spreadsheets without writing throwaway scripts or uploading files to external servers.
What Sets CleanSheet Studio Apart
Every untrimmed space, casing mismatch, broken email, currency symbol, empty row, and duplicate record is clearly marked directly inside the grid.
Preview every single cell and row change before committing, backed by a 20-step Undo history stack.
Handles quoted commas, escaped double quotes (""), multiline fields, empty numeric NULL values, and leading-zero ZIP/ID codes.
Includes per-column statistical profiling, a 2D cross-tab pivot table builder, derived column formulas, and SQL/JSON/Markdown converters.
Privacy Policy
How CleanSheet Studio processes files in browser memory and stores snapshots locally
1. Local In-Browser File Processing
When you open or drag-and-drop a CSV or TSV file into CleanSheet Studio, the file is read directly into your browser tab's memory using the standard HTML5 FileReader API. Your dataset rows and cells are not uploaded to a remote application backend.
2. Browser LocalStorage & Unencrypted Persistence
When you create a local workspace profile or click Save to Dashboard, your profile metadata, theme preference, and saved dataset snapshots are stored in your browser's standard localStorage on your device. Because browser localStorage is not encrypted at rest, please do not save confidential or sensitive datasets when using a shared or public computer.
3. Static UI Assets (CDN)
While your spreadsheet files remain in local browser memory, the interface loads typography and charting libraries (Google Fonts, Tailwind CSS, and Chart.js) from standard public CDNs when the page initializes.