Clean CSV Data Online Free
Trim whitespace, remove empty rows and columns, and delete duplicate rows from CSV, TSV, and TXT files — all in your browser with no uploads and no sign-up.
Everything You Need to Clean CSV Files
Trim Cell Whitespace
Strips leading and trailing spaces from every cell, so values with stray spaces compare and match correctly.
Remove Empty Rows
Deletes blank lines scattered through your file — including rows made of only commas or whitespace.
Remove Empty Columns
Deletes columns that hold no data in any row, leaving a compact, easy-to-read table.
Remove Duplicate Rows
Keeps the first occurrence of each identical row and removes the rest, so your mailing lists and exports stay unique.
CSV, TSV & TXT with Auto-Detection
Automatically detects comma, tab, semicolon, and pipe delimiters, and preserves quoted fields containing commas or newlines.
100% Private & In-Browser
Your files never leave your device. Everything is processed locally in your browser — no uploads, no servers, no sign-up.
What Is CSV Data Cleaning?
CSV files exported from spreadsheets, CRMs, or web forms often carry invisible problems: stray spaces, blank rows, empty columns, and duplicate entries that break lookups and skew reports. The AnyDocFlow CSV cleaner fixes these automatically. Just drop your CSV, TSV, or TXT file, choose the cleaning operations you need, and download a tidy version ready for Excel, Google Sheets, or your database. Because cleaning runs entirely in your browser, even sensitive contact lists never leave your computer.
How to Clean a CSV File
Three simple steps — no account required.
Upload or drop your file
Drag and drop one or more CSV, TSV, or TXT files, or click the drop zone to browse. Files of any size are accepted.
Choose cleaning options
Trim whitespace, remove empty rows, remove empty columns, and deduplicate are all enabled by default. Toggle any option to suit your data.
Download the cleaned CSV
Click Clean CSV, then download each cleaned file individually or all of them at once as a ZIP. The result is UTF-8 with BOM so Excel renders Chinese and accented characters correctly.
Things to Keep in Mind
Cleaning changes the file only in the ways you choose — values, numbers, dates, and leading zeros are preserved exactly. Rows are compared after trimming, so 'Alice' and ' Alice' count as duplicates and only the first is kept. Quoted fields with embedded commas, quotes, or newlines are handled correctly. The cleaned file keeps its original delimiter (comma, tab, semicolon, or pipe) and line endings.