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CSVTool.io
Free CSV tools that run entirely in your browser
6 followers
Free CSV tools that run entirely in your browser
6 followers
CSVTool.io is a free toolkit of 62 browser-based CSV tools: viewer, editor, validator, dedupe, compare, split, repair with an auditable change trail, and converters to Excel, JSON, SQL and more. Everything runs locally in your browser with web workers - no uploads, no signup, no server. Your files never leave your device, and the viewer opens files too big for Excel.
The local processing is a real win, especially for those massive files Excel chokes on. Surprised how snappy the dedupe and split tools felt even with a 200k row export.
Having a "favorite tools" sidebar or pin function would be great since 62 tools is a lot to scroll through every time. Also, a dark mode toggle for the viewer and editor would make long sessions way easier on the eyes.
Tried the dedupe tool on a messy client export and it caught duplicates I would have missed in Excel. Love that everything stays local, no upload anxiety.