Quick Start: Preview CSV Files

  1. Open the CSV Table Preview tool on HeronTool.
  2. Click the upload button and select your .csv file (large files supported).
  3. The tool automatically parses and displays it as a table; you can scroll to view the first 100 rows to check data formatting.
  4. To filter or sort, use the search box and column sorting above the table to quickly locate key data.

Convert CSV Formats

  1. In HeronTool's CSV Converter, upload your CSV file.
  2. Choose target format: JSON, Excel (.xlsx), or SQL script.
  3. Customize delimiter (comma, semicolon, tab) and encoding (UTF-8, GBK) for compatibility.
  4. Click "Convert" and download the result; everything happens locally in your browser for privacy.

FAQ

Q: CSV file too large, preview lags?
A: The CSV Table Preview tool loads only the first 1000 rows by default; you can also manually set a row limit to avoid browser crashes.

Q: Chinese characters garbled after conversion?
A: Check the source file encoding, select the correct one (e.g., UTF-8) before converting, or try the "auto-detect" feature.

Q: How to preserve leading zeros in CSV?
A: When converting to Excel, choose "Text" column type, or use HeronTool's CSV Editor to adjust column formats manually.