CSV Tools
Free CSV tools online: CSV to JSON converter, JSON to CSV, CSV viewer, open CSV in browser, CSV to Excel-friendly tables, CSV to SQL, CSV to Markdown, TSV converter, and CSV compare. Convert CSV files with no upload.
10 tools · 100% browser-based · No uploads · No signup
About these CSV tools
Free CSV tools online to open, check, and convert spreadsheet files in your browser. Convert CSV to JSON or JSON to CSV (including Excel exports). View a CSV as a table without Excel. Validate CSV, change comma to semicolon or TSV, convert CSV to SQL, XML, or a Markdown table, compare two CSV files, or transpose rows and columns.
The first row is treated as headers. Every cell stays text so ZIP codes and IDs keep leading zeros. Excel’s UTF-8 BOM is stripped automatically. Files are not uploaded.
Tools in this category
CSV to JSON Converter
A comma is not the only separator. Excel in Europe exports semicolons, and a leading zero in a zip code is data until JSON turns it into a number.
JSON to CSV Converter
Convert JSON to CSV online. Download a CSV you can open in Excel. Free JSON to CSV converter in your browser.
CSV Viewer
CSV viewer online. Open a CSV file as a table in your browser. View Excel CSV without uploading.
CSV Validator
CSV validator online. Check CSV files for errors, broken quotes, and missing columns. Validate CSV free.
CSV Delimiter Converter
Convert CSV delimiters online. Change comma to semicolon, tab (TSV), or pipe. Free CSV to TSV converter.
CSV to XML Converter
Convert CSV to XML online. Turn spreadsheet rows into XML. Free CSV to XML converter in your browser.
CSV to SQL Converter
Convert CSV to SQL online. Generate INSERT statements from a CSV file. Free CSV to SQL converter.
CSV to Markdown
Convert CSV to Markdown table online. Paste CSV and get a GitHub Markdown table. Free CSV to MD converter.
CSV Diff
Compare two CSV files online. See added, removed, and changed rows. Free CSV compare and CSV diff tool.
CSV Transpose
Transpose CSV online. Swap rows and columns in a CSV file. Free CSV transpose tool.
How these tools run in your browser
A CSV parser in this tab handles quoted commas, escaped quotes, and line breaks inside cells. The CSV viewer shows the first 250 rows so the page stays fast; counts and downloads still use the full file. Delimiter detection looks at the first lines. Nothing is sent to a server.
Common Use Cases
- Convert a CSV export to JSON for an API or script
- Turn JSON into a CSV you can open in Excel
- Open a CSV online when you do not have Excel
- Change comma CSV to semicolon for European Excel
- Generate SQL INSERT statements from a spreadsheet
Common Mistakes
Frequently Asked Questions
Open CSV to JSON Converter, paste your CSV (or Excel export), and copy the JSON. Delimiter is auto-detected, including tabs and semicolons.
Open JSON to CSV Converter, paste a JSON array of objects, pick comma or semicolon, and download the .csv file.
Yes. CSV Viewer shows the file as a table. Nothing is uploaded.
Yes. Tabs are detected, and the delimiter converter can output TSV on purpose.