Remove duplicate rows from CSV data based on a specific column. Keep only unique values for cleaner datasets. Everything runs locally in your browser — nothing is uploaded.
Analyze CSV structure — column types, counts, unique values, and empty cells.
Extract specific columns from CSV data by header name. Select the columns you need and get a clean CSV with only your chosen fields.
Merge two CSV files on a common column. Join datasets horizontally by matching key values, like a SQL JOIN for your spreadsheets.
Clean CSV data by trimming whitespace, removing empty rows, deduplicating, and applying column-aware transforms (email lowercasing, phone digit-stripping, note normalizing). Everything runs locally in your browser — nothing is uploaded.
Convert messy CSV or Excel sheets from clients into clean JSON in one batch. Handles missing values, nested rows, and generates strict JSON schemas for 50+ files at once. Everything runs locally in your browser — nothing is uploaded.
CSV Deduplicator lets you remove duplicate rows from CSV data based on a specific column. Keep only unique values for cleaner datasets. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Remove duplicate rows from CSV data based on a specific column. Keep only unique values for cleaner datasets. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Paste or type your content directly into the provided text area.
Yes. After the initial page load, CSV Deduplicator runs entirely on your device with no internet connection needed. All processing is done locally.
Select the column to check for duplicates. The tool keeps the first occurrence of each unique value in that column and removes subsequent duplicates.
Some deduplicators support compound keys. If not, combine columns into a single key first using the CSV tools, then deduplicate.
Yes. The first occurrence of each duplicate is kept. Subsequent duplicates are removed. The output maintains the original order of first appearances.
Exact string matching by default. Whitespace differences may cause false non-matches. Trim spaces before deduplicating for best results.
No. All processing happens locally in your browser. No CSV data is sent to any server.
CSV Row Sorter
Sort CSV rows by any column in ascending or descending order. Quickly organize your data for analysis and reporting.
Null Value Handler
Replace empty, null, or NA values in CSV data with a custom fill value. Clean your datasets for analysis and migration.
CSV to SQLite Web Terminal
Import CSV data directly into a SQLite database. Run SQL queries, filter rows, and export results.
Import to CSV
Convert TSV, Excel XLSX, vCard VCF, iCalendar ICS, and Parquet files to CSV. Everything runs locally in your browser — nothing is uploaded.