AI-Ready CSV Sanitizer

Free online CSV sanitizer. Clean messy spreadsheets for AI and LLM prompts: remove empty rows and columns, strip non-ASCII characters, normalize text and deduplicate rows. Runs entirely in your browser.

How to use the AI-Ready CSV Sanitizer

Open the AI-Ready CSV Sanitizer — it loads instantly in your browser, with no sign-up or install.
Drag and drop a CSV or TSV file onto the drop zone, or click to browse and select one.
Toggle the cleaning options on the right; the live preview re-cleans automatically. Then copy or download the cleaned CSV. Nothing you enter leaves your device.

Frequently asked questions

Is the AI-Ready CSV Sanitizer free?

Yes. The AI-Ready CSV Sanitizer on UtilitySuite is completely free, with no account, sign-up or payment required.

Do I need to create an account?

No. Every UtilitySuite tool and game works instantly with no login or registration.

Is my CSV file uploaded to a server?

No. The CSV is parsed and cleaned entirely in your browser — your data never leaves your device and nothing is uploaded.

What does it do to make a CSV AI-ready?

It removes empty rows and columns, trims and collapses whitespace, normalizes smart quotes and accents to plain ASCII, strips non-ASCII and control characters, and deduplicates rows so the file is clean, compact and token-efficient for LLM prompts.

Related developer tools

Browse all free online tools or play free browser games on UtilitySuite.

Utility HD

AI-Ready CSV Sanitizer

Data Preview

📊

Drop a CSV or TSV file here

or click to browse — comma, semicolon, tab or pipe delimited

Cleaning Options

Rows

Columns

Rows Removed

Cols Removed

First row is a header Keeps the header row and labels the dedupe columns by name.

Trim cell whitespace Removes leading and trailing spaces, tabs and newlines from every cell.

Collapse internal whitespace Turns runs of spaces, tabs and newlines inside a cell into a single space.

Normalize smart quotes & dashes Converts curly quotes, em/en dashes and ellipses to plain ASCII.

Normalize Unicode & accents Folds accented letters to ASCII (é → e, ü → u) using NFKD.

Strip non-ASCII & control chars Removes any remaining non-printable or non-ASCII characters.

Remove empty rows Drops rows where every cell is blank.

Remove empty columns Drops columns where every cell (including the header) is blank.

Deduplicate rows Keeps the first occurrence of repeated rows.

Match on:

Ready — open a CSV file to sanitize utilitysuite.io