Data tools

Change a sheet between CSV and Excel, read a token, test a pattern, or get a checksum. Files and text stay on this device.

• Convert a spreadsheet

  Convert a CSV or Excel file and download the other format.

• Split a spreadsheet

  Split a CSV or Excel file into row chunks and download a ZIP.

• Decode a JWT

  Show the header and payload of a JWT as JSON. The signature is not checked, and the token stays in this browser.

• Test a regular expression

  Run a JavaScript regular expression against sample text and copy the matches. The pattern and the text stay in this browser.

• Hash a file

  Hash the file on this device and copy the checksum.