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.

Kijker en redacteurOpen large CSV files in a fast local-first data grid.
VergelijkenReview two CSV files side by side without uploads.
Excel-viewerInspect old Excel files directly in the browser.
Parquet-viewerPreview 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.

GidsenRead practical guides for CSV cleanup and conversion.
HulpmiddelenBrowse the full tool library by workflow and category.
BloggenExplore articles about file workflows and privacy.
PrivacySee how local-first processing protects your data.
VoorwaardenReview 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

Kijker en redacteur
Vergelijken
Excel-viewer
Parquet-viewer

Excel workflows

CSV → Excel
Excel → CSV
JSON → Excel

Learn & product

Gidsen
Hulpmiddelen
Bloggen
Privacy
Voorwaarden

Color

Color palette generator
Gradient generator
Trending palettes
Trending gradients

Table

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CSV naar Excel batchconverter

Voeg CSV-bestanden toe (tot 200 MB elk, maximaal 50,000 rijen geladen per bestand), converteer ze en download vervolgens elk Excel-bestand één voor één.

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