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.

查看器Open large CSV files in a fast local-first data grid.
比较Review two CSV files side by side without uploads.
Excel 查看器Inspect old Excel files directly in the browser.
Parquet 查看器Preview 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.

指南Read practical guides for CSV cleanup and conversion.
工具Browse the full tool library by workflow and category.
博客Explore articles about file workflows and privacy.
隐私See how local-first processing protects your data.
条款Review 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

查看器
比较
Excel 查看器
Parquet 查看器

Excel workflows

CSV → Excel
Excel → CSV
JSON → Excel

Learn & product

指南
工具
博客
隐私
条款

Color

Color palette generator
Gradient generator
Trending palettes
Trending gradients

Table

文件在本设备解析，不会上传到我们的服务器。编辑内容保存在浏览器本地存储，方便下次继续。清除会从本设备删除这些数据。隐私条款

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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