Format-to-format tools for clean handoffs.

CSV → JSONTurn CSV rows into JSON records locally in the browser.
JSON → CSVConvert JSON arrays into CSV for spreadsheets and tools.
CSV → ParquetExport CSV data into columnar Parquet files.
Parquet → CSVFlatten Parquet datasets back into shareable CSV files.
JSON → ParquetTransform structured JSON data into Parquet.
Parquet → JSONInspect Parquet as JSON without leaving the browser.
CSV → Markdown TableGenerate markdown tables from CSV instantly.

Viewers & compare

Inspect, search, and spot differences locally.

VisorOpen large CSV files in a fast local-first data grid.
CompararReview two CSV files side by side without uploads.
Visor de ExcelInspect old Excel files directly in the browser.
Visor de ParquetPreview Parquet columns and rows with grid controls.

Excel workflows

Move between CSV/Excel/JSON while staying in-browser.

CSV → ExcelConvert CSV into Excel-ready files for office workflows.
Excel → CSVExtract CSV from legacy Excel spreadsheets.
JSON → ExcelCreate Excel output from structured JSON data.

Learn & product

Docs, hubs, and key pages.

GuíasRead practical guides for CSV cleanup and conversion.
HerramientasBrowse the full tool library by workflow and category.
BlogExplore articles about file workflows and privacy.
PrivacidadSee how local-first processing protects your data.
TérminosReview terms for the product and website.

Color tools, generators, and gallery-style inspiration.

Color palette generatorBuild palettes and explore combinations for brand work.
Gradient generatorCreate bold gradients for interfaces and assets.
Trending palettesBrowse popular palette collections and ideas.
Trending gradientsScan standout gradients curated from the gallery.

Local-first converters, viewers, and file tools

Local-first tools

Table tool directory

Convert, compare, and review tabular files in your browser. Use the categories below to find the right workflow fast—without uploading sensitive data to unknown servers.

Converters

CSV → JSON
JSON → CSV
CSV → Parquet
Parquet → CSV
JSON → Parquet
Parquet → JSON
CSV → Markdown Table

Viewers & compare

Visor
Comparar
Visor de Excel
Visor de Parquet

Excel workflows

CSV → Excel
Excel → CSV
JSON → Excel

Learn & product

Guías
Herramientas
Blog
Privacidad
Términos

Color

Color palette generator
Gradient generator
Trending palettes
Trending gradients

Table

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JSON to Parquet

Upload a JSON array of objects, preview rows locally, then download a .parquet file without server upload.

JSON only (array of objects) · up to 200 MB · max 50,000 rows shown