Free Data Tools
Free online data tools to convert between CSV, JSON, XML, YAML, Excel and TSV, clean messy CSVs, sort and de-duplicate rows, and merge or split columns.
18 tools in this category.
Popular tools
Jump straight to the most-used tools in this category.
Helpful guides
Short reads that explain the ideas behind these tools.
Column Splitter
Split spreadsheet or CSV columns by delimiter, width, or pattern.
CSV Cleaner
Clean CSV data by trimming spaces, fixing rows, and removing duplicates.
CSV to Excel
Convert CSV data into an Excel-compatible spreadsheet.
CSV to JSON Converter
Convert CSV to JSON with automatic delimiter detection, headers, and type parsing.
CSV to XML Converter
Convert CSV data into structured XML.
CSV/TSV Spreadsheet Converter
Clean CSV and TSV spreadsheet exports with local preview, copy, and download.
Data Sorter
Sort pasted or uploaded data by number, date, or CSV column, keeping rows intact.
Excel Formula Generator
Generate spreadsheet formulas from plain-language instructions.
Excel to CSV
Convert Excel spreadsheets to CSV files in your browser.
Excel to PDF
Convert spreadsheet data into a PDF document.
JSON Diff Checker
Compare two JSON objects and highlight added, removed, and changed keys.
JSON to CSV Converter
Convert JSON arrays and objects to CSV, with nested object flattening and custom delimiters.
JSON to XML Converter
Convert any JSON object or array into readable, well-structured XML.
JSON to YAML Converter
Convert JSON objects and arrays into clean, human-readable YAML.
Merge Columns
Merge spreadsheet or CSV columns with a custom separator.
Remove Duplicate Rows
Remove duplicate rows from CSV, TSV, or pasted table data.
XML to JSON Converter
Convert XML into clean, formatted JSON.
YAML Formatter
Format and validate YAML data instantly in your browser.
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Health
Calculate BMI, calories, macros, heart rate zones, pregnancy dates, hydration, fitness metrics, body composition, and wellness estimates.
Converters
Convert length, weight, temperature, area, volume, speed, time, energy, data storage, and other common measurement units online.
Date & Time
Free date and time tools to convert Unix timestamps, calculate the difference between dates, count down to a deadline, switch time zones, and convert military time.
Everyday
Practical everyday calculators for paint coverage, concrete and gravel volumes, electricity costs, wind chill, heat index, fuel cost, ABV, and more.
Frequently asked questions
Can I convert CSV to JSON without uploading?
Yes. Paste your data or drop a file in the browser; the conversion runs locally. Nothing is uploaded.
Do these tools handle large spreadsheets?
They handle anything your browser can hold in memory. For very large CSVs (millions of rows) we recommend a desktop tool, but most spreadsheets work without issue.
Which formats are supported?
CSV, TSV, JSON, XML, YAML, and XLSX are all covered, both directions. There are also dedicated tools for cleaning, sorting, deduplicating, and merging or splitting columns.
How to choose the right tool
Data tools help clean, reshape, and convert structured files or pasted tables before analysis, import, or sharing.
Common formats include CSV, TSV, JSON, XML, YAML, XLSX, and plain text tables. Delimiters and headers matter for cleaner results.
Choose by need
- Use converters when you need the same data in a different format.
- Use cleaners, sorters, and duplicate removers when the data is messy but already in the right format.
- Use column tools when names, addresses, tags, or IDs need splitting or merging.
Common tasks
- Convert CSV rows into JSON objects.
- Remove duplicate rows before importing a spreadsheet.
- Merge first and last name columns for a mailing list.