How do I open data in the Editor?

Drag or choose a CSV, XLSX, JSON, or NDJSON file and click Open Editor. You can also choose Open Editor from a flagged Data Quality column to continue with that issue already in context.

How do I fix an issue found in Data Quality?

Open the flagged column in Editor, apply the appropriate cleanup step or manual edit, and review the updated values. Your applied edits remain associated with the editing session while you work.

How do I export or recheck my cleaned data?

For a CSV input, use Export to download the edited dataset. When you arrived from Data Quality, choose Done — Re-validate to run the quality check again on your corrected data.

Free Online CSV & Excel Editor - Clean Data

Editor

What you can fix

Trim & normalize whitespace
Standardize dates & numbers
Merge rare or mistyped categories
Fill or flag missing values
Re-validate when you’re done

Edits stay in your browser — nothing is uploaded.

Upload a file to clean formatting and resolve flagged issues.

Drag & drop, or click to choose CSV, XLSX, JSON, or NDJSON

Choose a file above to start editing.

Data cleaning FAQ

How do I open data in the Editor?: Drag or choose a CSV, XLSX, JSON, or NDJSON file and click Open Editor. You can also choose Open Editor from a flagged Data Quality column to continue with that issue already in context.
How do I fix an issue found in Data Quality?: Open the flagged column in Editor, apply the appropriate cleanup step or manual edit, and review the updated values. Your applied edits remain associated with the editing session while you work.
How do I export or recheck my cleaned data?: For a CSV input, use Export to download the edited dataset. When you arrived from Data Quality, choose Done — Re-validate to run the quality check again on your corrected data.