Validate Data Tools
Browse all 16 free in-browser validate utilities. Your rows never leave your browser.
Validate CSV
Audit CSV files for structural errors, encoding problems, and row-length inconsistencies.
Launch Tool →Validate JSON
Parse and validate JSON strings to expose syntax errors at exact line and column positions.
Launch Tool →Find Duplicate Rows
Identify and count duplicate rows in CSV files by exact match or by key column selection.
Launch Tool →Find Missing Values
Audit CSV columns for empty, null, and whitespace-only cells and produce a completeness report.
Launch Tool →Validate an Email List
Check every email in a CSV column for valid RFC 5322 format without sending test messages.
Launch Tool →Validate Phone Numbers
Scan a CSV phone column for format errors, missing country codes, and invalid digit counts.
Launch Tool →Check Column Consistency
Audit CSV columns to detect mixed data types, inconsistent formats, and type anomalies.
Launch Tool →Find Invalid Dates
Scan date columns for invalid entries: impossible dates, ambiguous formats, and future or past-range anomalies.
Launch Tool →Find Outliers in a Number Column
Identify statistical outliers in numeric columns using IQR or Z-score threshold methods.
Launch Tool →CSV Row and Column Counter
Count data rows, header columns, total cells, and non-empty cell percentages in any CSV.
Launch Tool →Profile a CSV
Automatically profile every CSV column: type inference, null rate, unique count, min/max, mean, and top-5 values.
Launch Tool →Find Similar Duplicates (Fuzzy Match)
Identify subtle duplicates and typos in your CSV using configurable fuzzy matching algorithms.
Launch Tool →Detect and Fix Delimiter Problems
Scan for ragged rows where unescaped commas or semicolons broke table alignment.
Launch Tool →Fix Unclosed Quotes
Detect mismatched quotes that cause entire rows of data to be swallowed into a single cell.
Launch Tool →Compare Two JSON Arrays
Diff two JSON arrays to find added, deleted, and modified records based on a shared key.
Launch Tool →Text Diff Checker
Compare two versions of a text document and highlight additions, deletions, and changes.
Launch Tool →