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Focused tools

10 CSV jobs

Runtime

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Private CSV tools for practical table work

Format, validate, convert, select, filter, sort, deduplicate, and compare tabular text without uploading a row.

Every operation remains in the active browser tab.

Choose a CSV job

Each route has its own exact input and output contract.

CSV FormatterParse a rectangular table, preserve every cell value, and emit consistently quoted comma-separated rows.Open tool
CSV ValidatorCheck quoting, consistent column counts, and a usable unique header, then report the detected delimiter and table size.Open tool
CSV to JSON ConverterUse the header as object keys and turn every following row into a flat JSON object whose cell values remain strings.Open tool
JSON to CSV ConverterBuild columns from first-seen object keys, serialize scalar values, and guard formula-like text for safer spreadsheet import.Open tool
CSV Delimiter ConverterParse the source table and serialize it with a chosen delimiter instead of performing unsafe character replacement.Open tool
CSV Column SelectorEnter exact header names one per line to keep only those columns and arrange them in the requested order.Open tool
CSV Row FilterChoose one column and a bounded text comparison; the tool never evaluates code or regular expressions.Open tool
CSV Row SorterSort data rows by one column while keeping the header fixed and preserving source order when values compare equally.Open tool
CSV Duplicate Row RemoverDeduplicate complete rows, or list key headers one per line to keep the first row for each selected value combination.Open tool
CSV CompareCompare header order and exact decoded row occurrences, then report records added to or removed from the second table.Open tool

Start with the CSV formatter

Normalize one table here, or choose a dedicated route for validation, conversion, projection, filtering, sorting, deduplication, or comparison.

Format CSV

Inputs are limited to 1 MiB, 10,000 rows, and 256 columns.

Paste or edit the source. Tool Swim does not upload or save it.

Detection inspects the first logical row outside quoted fields.

Formatted CSV

Nothing is placed in a URL, account, or remote log.

A bounded local table workspace

CSV exports can contain customer records, operational data, and identifiers. Tool Swim parses and transforms them inside the active tab, with no upload endpoint, cloud save, or content-bearing telemetry.

Inputs and generated outputs are limited to 1 MiB, tables to 10,000 rows and 256 columns, and filters to a fixed set of literal comparisons. These boundaries keep errors predictable and rule out expression evaluation.

Local processing is not automatic anonymization. Review selected columns and copied or downloaded results before sharing them, especially when a row can identify a person indirectly.