Welcome to Data Workbench
What Is Data Workbench?
Data Workbench is a free, browser-based data cleaning and inspection tool. It parses your file the moment you drop it in, profiles every column, scores your data's overall health, and tells you exactly what's wrong — duplicate rows, missing values, mixed column types, untrimmed whitespace, and inconsistent structure. Then it offers one-click fixes for every issue it finds.
There's nothing to install, no account to create, and no data ever leaves your machine. The entire tool runs client-side in your browser using JavaScript. It works with JSON, CSV, TSV, XML, YAML, and plain text files.
How to Clean a Data File in 60 Seconds
Drag and drop a file onto the page, click Import to browse, or paste data directly. You can open multiple files at once — each gets its own tab.
The sidebar immediately shows a validation report with color-coded checks — structure validity, duplicate rows, null values, mixed column types, and untrimmed whitespace. A health score from 0 to 100 gives you the big picture at a glance.
Each issue comes with a one-click fix. Remove duplicates, trim whitespace, drop incomplete rows, flatten nested objects, and more. Every action shows exactly what changed and every step is fully reversible.
Hit Export and the tool summarizes everything it did — row count changes, steps applied, and output format — before downloading your cleaned file as JSON, CSV, or plain text.
Features
Auto Data Profiling
Every file is analyzed on import. Column types, null counts, unique values, numeric ranges, and string lengths are computed instantly with no manual setup.
Data Health Dashboard
A 0–100 health score, completeness bars, and a field-by-field breakdown help you understand data quality at a glance. Issues are flagged with color-coded badges.
Smart Suggestions
Data Workbench doesn't just find problems — it recommends specific fixes. Click a suggestion and the transformation is applied immediately.
Reversible Pipeline
Every transformation is tracked in a visible pipeline with impact metrics. Undo any step or clear them all. Original data is always preserved.
Multi-File Tabs
Work with multiple files simultaneously. Each file keeps its own tab with independent parsed data, pipeline steps, and active view.
Column Context Menus
Click the menu button on any column header in table view to sort, filter, rename, or remove it directly.
Four View Modes
Switch between raw text, sortable table, collapsible tree, and statistics dashboard — each purpose-built for a different type of data inspection.
Quick-Start Workflows
Pre-built presets like JSON to CSV, CSV Cleaner, Data Profiler, and Flatten JSON let you start common tasks with a single click.
Available Transformations
Apply any of the following from the toolbar or sidebar suggestions. Each reports exactly what changed, and all are fully reversible.
Your data never leaves your computer. There are no servers, no uploads, no analytics, and no accounts. Files are parsed and transformed entirely in your browser. Close the tab and everything is gone.
Who Uses Data Workbench
Developers use it to validate API responses, inspect JSON payloads, flatten nested structures, and convert between JSON and CSV during debugging and testing.
Data analysts use it to clean CSV exports before loading them into spreadsheets or BI tools — removing duplicates, stripping whitespace, and dropping rows with missing values.
QA engineers use it to profile test data, verify schema consistency, and confirm that upstream transformations produced the expected output.
Non-technical users use it when they receive a data file they don't fully understand. The auto-profiling and health dashboard explain what's inside and what needs attention, without writing a single formula or line of code.
Keyboard Shortcuts
Power users can navigate entirely from the keyboard. Data Workbench supports Ctrl+O to import a file, Ctrl+S to export, Ctrl+Z to undo the last pipeline step, and Ctrl+W to close the active file tab.
Frequently Asked Questions
- Is Data Workbench free?
- Yes. There is no paid tier, no usage limits, and no account required. Open the page and start working.
- What file formats does it support?
- JSON, CSV, TSV, XML, YAML, and plain text. The format is auto-detected on import — you never need to specify it.
- How large of a file can I open?
- Most modern browsers handle files up to 50–100 MB without issues. The table view caps rendering at 5,000 rows for performance, but all rows remain available for transformations and export.
- Can I work with multiple files at once?
- Yes. Each imported file gets its own tab with fully independent state — parsed data, pipeline steps, and view mode are all preserved when switching between files.
- Will my data be uploaded or stored anywhere?
- No. Data Workbench is a single HTML file that runs entirely in your browser. There is no server, no network request, and no tracking of any kind.
- Can I undo changes?
- Every transformation is reversible. Use Undo to roll back the last step, or Clear All to restore the original imported data. Your source file is never modified.
- Does it work offline?
- Yes. Once the page has loaded, it works without an internet connection. You can save the HTML file to your computer and use it anytime.