Fully featured web version of the app is available for a limited at unfckr.app - try the log analyzer - paste any giant logs, instant parsing and keyword detection. The only thing it can't do is the terminal command and pipeline run over local folders, that's what the app is for.
data workbench - profile, clean, transform, and export CSV, JSON, and SQLite - the full suite (this page)

• JSON flattener - nested JSON or NDJSON to flat columns, arrays and objects unrolled

• CSV PII scrubber - find emails, phones, SSNs, and card numbers - mask, hash, or drop them

• JSON to CSV - convert JSON or NDJSON to CSV with full column control

• CSV to JSON - convert CSV to JSON or NDJSON, streamed at any size

• Excel to CSV - read .xlsx workbooks and export CSV, sheets and all

• CSV to Excel - write a real .xlsx where leading zeros and dates survive

• SQL on CSV - real SQL over your files: joins, GROUP BY, a read-only console

• CSV to SQLite - drop several files, get one .sqlite database with discovered foreign keys

• CSV to SQL - CREATE TABLE and INSERT statements for Postgres, MySQL, SQL Server, SQLite

• JSON to TypeScript - TypeScript interfaces and JSON Schema derived from your real data

• large CSV viewer - open files past Excel's 1,048,576-row limit without loading them into RAM

• regex painter - highlight example matches, get a verified regular expression back

• encoding fixer - detect windows-1252/UTF-16 and repair garbled text (Jos Jos )

• log parser - read log files as events: layouts detected, stack traces kept whole, timestamps normalized, and a volume-over-time strip drawn in SQL across every row

• visualize - chart any table you have open - bar, line, area or point - drag across it to filter, and export svg, png, or the vega-lite spec that drew it

• theme builder - design, test, and export custom color themes with live previews, palette derivation, and contrast diagnostics

unfckr: a free, private data workbench that runs entirely in your browser