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60 free tools · 100% private · No signup

Free Online CSV Tools — View, Edit & Convert

60 free CSV tools in one place: open CSV files in a fast spreadsheet-style viewer, edit and clean data, convert CSV to Excel, JSON, SQL, XML, TSV, and more, or join, pivot, split, and compare files. Everything runs in your browser — files are never uploaded.

Open CSV ViewerBrowse all tools

Drop your file here or browse from your device

Accepts CSV, TSV, TXT. Maximum input: 10 MiB. Files above this hard limit are rejected before local processing.

100% FreeNo Signup RequiredBrowser-Only Processing

CSV Viewer & Editor

CSV Viewer

View CSV files in a spreadsheet-style grid with sorting, filtering, and search

CSV Editor

Edit CSV files online with cell editing, add/remove rows and columns

CSV Validator & Repair

Validate malformed CSV files, review safe repairs, and prepare a new copy for import

Convert CSV

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CSV → Excel

Convert CSV files to an Excel workbook (.xlsx or .xls) with optional auto-fit columns

Excel → CSV

Convert Excel files (.xlsx, .xls) to CSV privately in your browser

XML → CSV

Convert repeating XML records into a flattened CSV table

CSV → JSON

Convert CSV files to JSON format

JSON → CSV

Convert JSON arrays to CSV format

CSV → SQL

Convert CSV files to SQL INSERT statements

CSV → Parquet

Convert CSV files to Apache Parquet format in your browser

Sheets → CSV

Download any shared Google Sheet as a CSV file

Manipulate CSV

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Splitter

Split large CSV files into smaller parts

Compare

Compare two CSV files and highlight differences

Joiner

Join two CSV files on a common key column with database-style matching

Pivot

Create pivot tables from CSV data, or unpivot wide data back to long format

Sort

Sort CSV data by one or more columns

Transpose

Swap rows and columns in CSV files

Cleaner

Clean and sanitize CSV data

Encoding

Detect and convert CSV, TSV, or TXT encoding locally with explicit loss checks

Geo & Mapping

KML → CSV

Convert Google Earth KML files to CSV format

CSV → KML

Convert CSV with coordinates to KML format

GeoJSON → CSV

Convert GeoJSON files to CSV format

CSV → GeoJSON

Convert CSV with coordinates to GeoJSON format

Why Use CSVTool.io?

100% Private

Your files never leave your browser. All processing happens locally on your device.

No Upload Wait

Start once your browser reads the file. Processing time and practical file size depend on your device and the selected tool.

No Account Required

Start using any tool immediately. No signup, no login, no email required.

Open CSV files online

Use the CSV Viewer as a private CSV reader when you need to open a CSV file without Excel, Google Sheets, or uploading data. It can detect delimiters, load pasted data, show guarded inputs in a virtualized grid, and help you search, sort, filter, edit, copy, or download the result.

The viewer is also the fastest starting point when you want to inspect an export before sending it to the CSV Editor or a converter.

Convert CSV and Excel files

Use CSV to Excel when you need an .xlsx or .xls workbook with fitted columns, or Excel to CSV when a spreadsheet needs to be imported into another tool. You can also convert between CSV and JSON, SQL, XML, YAML, Markdown, HTML, TSV, and Parquet without sending data to a server.

Mapping workflows are covered too: turn KML, GeoJSON, or coordinate CSV files into formats that work with Google Earth, GIS tools, and data pipelines.

Fix common CSV problems

CSV imports often fail because of inconsistent headers, duplicate rows, delimiter mismatches, blank rows, or encoding problems. Use CSV Validator & Repair to check structure and prepare a repaired copy, CSV Cleaner to remove messy rows, and CSV Header Editor to rename or normalize columns before uploading to another system.

If special characters look broken, try the CSV Encoding Converter and export a clean UTF-8 or UTF-8 BOM file for Excel, databases, CRMs, and analytics tools.

All CSV Tools on CSVTool.io

Every tool on the site — view, edit, sort, split, compare, transpose, and convert CSV files to and from Excel, JSON, SQL, XML, and more. All of them are free and run entirely in your browser.

CSV Viewer & Editor

  • CSV Viewer — View CSV files in a spreadsheet-style grid with sorting, filtering, and search
  • CSV Editor — Edit CSV files online with cell editing, add/remove rows and columns
  • CSV Validator & Repair — Validate malformed CSV files, review safe repairs, and prepare a new copy for import

Convert CSV

Manipulate CSV

  • Change CSV Delimiter — Convert CSV separators between comma, semicolon, tab, and pipe
  • CSV Splitter — Split large CSV files into smaller parts
  • CSV Merger — Append multiple CSV files into one table with stack or union columns
  • CSV Compare — Compare two CSV files and highlight differences
  • CSV Filter — Filter CSV rows based on conditions
  • CSV Sort — Sort CSV data by one or more columns
  • CSV Dedupe — Remove duplicate rows from CSV files
  • CSV Transpose — Swap rows and columns in CSV files
  • CSV Column Reorder — Reorder and select columns in CSV files
  • CSV Header Editor — Edit column headers in CSV files
  • CSV Encoding Converter — Detect and convert CSV, TSV, or TXT encoding locally with explicit loss checks
  • CSV Cleaner — Clean and sanitize CSV data
  • CSV Row Counter — Count rows and columns in CSV files
  • CSV Sampler — Extract random or first N rows from CSV
  • CSV Query — Select, filter, sort, and limit CSV rows with SQL-like syntax
  • CSV Joiner — Join two CSV files on a common key column with database-style matching
  • CSV Pivot — Create pivot tables from CSV data, or unpivot wide data back to long format
  • CSV Generator — Generate sample CSV files with realistic test data — names, emails, dates, numbers, and more
  • CSV Analyzer — Profile CSV files: column types, empty cells, unique counts, and min/max stats

Geo & Mapping

Database Tools

Contacts & Calendar