Convert a CSV without handing it to anyone.

Drop a spreadsheet, pick an output format, and download the result. Everything runs in your browser — the file never leaves your machine.

Drop your CSV or TSV file here or click to browse files

info Supports CSV, TSV, TXT • Max file size: 100 MB

Convert to:

More formats coming soon

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description —

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shield Sandbox RAM only

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Data Preview

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Null Values

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Detected Delimiter

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Encoding

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Memory Footprint

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Data Profile Composition

Waiting for parse…

Output

Delimiter

Encoding

First row contains headers Skip empty rows & whitespace lines

data_object JSON Output Schema Standard

Array of objects [{ id: 101, ... }, { ... }] Newline-delimited (NDJSON) One json line per record Nested by primary key { "101": { ... }, ... }

Pretty print layout

Indentation depth

2 spaces

Cast numeric strings to numbers

Estimated output payload —

verified_user

Zero Data Telemetry: Processing executes in local memory threads. No network activity.