CSV Cleaner

Clean and format CSV data. Trim cells, remove empty rows, auto-detect delimiters. Free, private — all in your browser.

Paste CSV data

Delimiter:

Cleaned CSV

About CSV Cleaner

Clean and normalize CSV data. Trim whitespace, remove empty rows, normalize headers, fix encoding issues. All processing happens in your browser — your data never leaves your device.

Auto-Clean

Trim spaces, remove empty rows and columns, normalize headers to lowercase with underscores. One click cleanup.

Encoding Fix

Fix common CSV encoding issues including BOM characters and non-printable characters.

Preview Changes

See row counts before and after cleaning. Preview output before downloading the cleaned file.

Private & Secure

CSV data processed locally in your browser. No uploads, no servers. Works with files of any size.

📋 Common Use Cases

Cleaning Exported CRM Data

Fix extra spaces, inconsistent quoting, and encoding glitches in CSV exports from CRMs before merging into a master database.

Preparing Bulk Import Files

Sanitize messy CSV files received from external partners or clients before feeding them into an import pipeline.

Normalizing Multi-Source Data

Standardize delimiter styles, line endings, and encoding across CSV files collected from different sources before analysis.

Removing Artifacts from Scraped Data

Strip extraneous whitespace, HTML remnants, and empty rows from web-scraped tabular data to make it analyzable.

🪜 How to Use This Tool

Paste your CSV data
Copy the messy CSV content and paste it into the input area or upload a file directly.

Select cleaning options
Choose which fixes to apply — trim whitespace, remove empty rows, fix encoding, or normalize delimiters.

Preview the cleaned result
Review the sanitized table to confirm the data looks correct before proceeding.

Export the clean version
Download the polished CSV or copy it to clipboard for immediate use in your workflow.

Frequently Asked Questions

Is this data tool free?▼

Yes. All data tools are completely free. No signup needed.

Is my data sent to a server?▼

No. All data processing happens in your browser. Your JSON, CSV, SQL, and text data never leaves your device.

Can these handle large files?▼

JSON formatter and CSV tools comfortably handle files up to ~10MB in browser. Performance depends on your device for larger datasets.