ConvertMate

Boring files. Clean output.

Convert CSV, JSON, and Excel in the browser. Preview rows, switch Excel sheets, and download clean data without sending files to a server.

Try converterView source
local only
name,email,total
Ada,ada@client.com,129
Grace,grace@client.com,349
Alan,alan@client.com,0
→ JSON / CSV / Excel

01

Private

Files stay in your browser. No backend upload.

02

Practical

CSV, JSON, Excel, and multi-sheet workbooks.

03

Fast

Preview, convert, download. No account needed.