Free online data tools
Convert Your Data Between CSV, Excel, JSON and HTML
Convert a data file from one format to another without installing anything or uploading it anywhere. Load a csv, xlsx, xls, json or html file and get it back as csv, Excel, JSON or an HTML table.
01
Load your data
Choose your files, then select Load Data to get started.
Your files are processed locally in this tab.
Select one or more files.
02
Choose your options
Setting up…
Your file is processed inside this browser tab and is never uploaded.
Frequently asked questions
Which formats can I convert between?
In: csv, xlsx, xls, json and html. Out: csv, Excel, JSON and HTML.
Which sheet is used from a workbook?
The first sheet. To convert a different sheet, split the file first with the Split Data tool.
Is my file uploaded to a server?
No. The conversion runs inside your browser tab, so the file never leaves your computer.
Other free tools
- Combine Data — Combine data from multiple files or Excel sheets into a single file.
- Split Data — Split one file into separate files or Excel sheets based on a column value.
- Merge Data — Merge or join a dataset from two different files on a shared column.
- Compare Data — Compare data from two different files and see exactly what changed.