Vscode Data Preview Save

Data Preview 🈸 extension for importing 📤 viewing 🔎 slicing 🔪 dicing 🎲 charting 📊 & exporting 📥 large JSON array/config, YAML, Apache Arrow, Avro, Parquet & Excel data files

Project README


Build Status Apache-2.0 License https://ko-fi.com/dataPixy

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Data Preview 🈸 extension for importing 📤 viewing 🔎 slicing 🔪 dicing 🎲 charting 📊 & exporting 📥 large .json array .arrow .avro .parquet data files, .config .env .properties .ini .yml configurations files, .csv/.tsv & .xlsx/.xlsb Excel files and .md markdown tables with Perspective - streaming data analytics WebAssembly library.

Data Preview

🈸 Features

  • Preview .json .arrow .avro .parquet .yml .csv/.tsv & .xlsx/.xlsb data files in a Data Grid w/Sorting & Filtering
  • Grid Data Summary display w/Aggregate Functions, Row & Column Pivots (a.k.a. Group By & Split By)
  • Basic Charts 📊 creation w/Aggregate Functions, Row & Column Pivots
  • Pluggable Charting 📊 libraries for bult-in Charts: d3fc || highcharts
  • Persistent Data Preview Settings (View, Sort, Filter, Pivots, etc.) for restore of open Data View panels on VSCode Reload
  • Mulptiple Spreadsheets Data Preview for Excel data files
  • Markdown tables data preview for .md documentation files
  • Data .schema.json generation for Arrow & Avro Data Schema Text Previews in JSON format
  • Binary Data files .json generation for Arrow, Avro & Excel formats for Text Data Preview
  • Property Grid display for .json .config .env .properties .ini & .yml configuration files
  • Open Data Preview on Side option for slim data || config files
  • Quick Launch new Data Preview input box for data files in open workspace
  • Save Filtered Data Grid || Chart 📊 Data in .arrow .csv .json(s) .yml & .properties formats
  • Save & Load Data View .config options
  • Dark, Light, Dense & High Contrast Blue Data Preview 🈸 Panel UI Themes

Next V.

  • Will include large text & binary data files loading & Apache Arrow data streaming.

Note: Data Preview 🈸 is already capable of loading a few 10+MB's large data files with 100+K records & extensive list of supported Data Formats you'll be hard pressed to find on VSCode marketplace in one extension.

See data/large/... data folder for sample large data files and Data View .configs you can try in Data Preview 🈸.


Install Data Preview 🈸 via vscode Extensions tab (Ctrl+Shift+X) by searching for data preview || via VSCode marketplace search results.

List of Data Preview 🈸 extension config Settings, data.preview command(s), keyboard shortcut(s), augmented vscode UI context menus, added Data Language mappings, supported Data Files list & configurable Theme & Charts 📊 Settings:

Data Preview Contributions


Create User or Workspace Settings in vscode to change default Data Preview 🈸 extension Settings:

Setting Type Default Value Description
data.preview.theme string dark Data Preview UI Theme: dark, light, dense.light, dense.dark, or vaporwave (hight contrast blue theme)
data.preview.charts.plugin string d3fc Data Preview Charts 📊 library to use for built-in charts: d3fc or highcharts
data.preview.create.json.files boolean false Creates .json data files for Arrow, Avro & Excel binary data formats
data.preview.create.json.schema boolean true Creates .schema.json files for Arrow & Avro metadata binary data formats
data.preview.openSavedFileEditor boolean true Opens created data file Content Editor on Data Save
data.preview.log.level string info Data Preview run log level: info or debug for issues troubleshooting

Data Preview 🈸 example using dark UI theme with d3fc Charts 📊 Data View config, viewing superstore.arrow data file :)

Data Preview Dark

Usage Tips

Data Preview 🈸 Launch Tips

  1. Run View -> Command Palette...>Data: Preview Data command or Ctrl+Shift+D in an open .json .config .env .properties .ini .yml or .csv/.tsv text data file document to launch Data Preview panel.
  2. File -> Save (Ctrl+S) your text data file for immediate updates in an open Data Preview 🈸 panel.
  3. Right-click on a Binary .xlsx/.xlsb, .arrow or .avro data file in VSCode File Explorer to launch Data Preview panel.
  4. Use exposed explorer/context, editor/title or editor/title/context Preview Data 🈸 or Preview Data on Side context menu options to preview your data files.
  5. Click on the Data View Filename toolbar link to Load saved Data View Grid || Chart 📊 .config.
  6. Click on the Data View 🈸 icon to Launch new Data Preview Panel for new view config changes.
  7. Use Open Data File or URL 📤 option from Data View toolbar to launch new Data Preview 🈸.
  8. Run View -> Command Palette...>Data: Preview Remote Data command or Ctrl+Shift+R to launch Data Preview for remote http(s) data files.

Data Preview Open Data File

Data Grid/Filter/Columns UX Tips

  1. Double click on the Grid Column header to Sort data by that column.
  2. Drag and drop a column from the left-side Columns control panel into Filter fields for data filtering (Group By, Split By, Sort, Filter).
  3. Drag columns up and down in the left-side Columns control panel to reorder displayed columns in the Data Grid.
  4. Uncheck a column in the Columns control panel to remove it from a Chart 📊 or Data Grid display.

Usage Scenarios

Use Data Preview 🈸 to:

  • Load large data files for sorting, filtering & charting 📊
  • Export displayed data in a compact binary .arrow data format, .ods .xlsb || .xlsx spreadsheet format, or .csv .json .yml .md or .properties text formats
  • Preview .properites and other key-value pairs configuration files to reformat them or find set config option values
  • Generate Arrow & Avro .shema.json for metadata text preview of those binary data files
  • Generate .json files for text data preview of binary Excel files
  • Preview Excel files and workbooks with multiple workseets without opening Excel
  • Convert .csv or .tsv data to .json or .yml format
  • Extract, sort, filter and save markdown tables from .md documentation files
  • Use built-in Charts 📊 for Exploratory Data Analysis

Supported JSON, Config, Binary & Excel Data File Formats

Tip: try sample data and Data View .config files from this repository data/... folders: data/arrow data/avro data/parquet data/config data/excel data/json data/yaml data/large

Vega datasets repository also has a broad collection of sample .csv & .json array data files you can try in Data Preview 🈸

Data Preview 🈸 Files Matching Rules

  "when": "resourceFilename =~ /.*\\.(json|jsonl|json5|hjson|ndjson|arrow|arr|avro|parquet|env|config|properties|ini|yml|md|csv|tsv|txt|tab|dif|ods|xls|xlsb|xlsx|xlsm|xml|html)/",
  "command": "data.preview",
  "group": "navigation"

Data Preview 🈸 Files Loading Details

Note: .json .config & .yml configuration files that don't contain array data are converted to flat properties key/value pairs Object and displayed in a Property Grid Data View mode. See json.utils.ts for more info.

Data File Extension(s) File Type Data Parsing Library/Method Used Data Format Specification
.json .config .jsonl .ndjson text JSON.parse() https://json.org/
.json5 text json5/JSON5.parse() https://json5.org/
.hjson text hjson-js/Hjson.parse() https://hjson.org/
.arrow .arr binary apache-arrow/Table.from() https://arrow.apache.org/
.parquet binary parquets/ParquetReader.openFile() https://parquet.apache.org/documentation/latest
.properties .env text node-properties/properties.parse() https://en.wikipedia.org/wiki/.properties
.ini text node-properties/properties.parse() https://en.wikipedia.org/wiki/INI_file
.md text RegExp/markdownToCsv() https://en.wikipedia.org/wiki/Markdown
.yml .yaml text js-yaml/yaml.load() https://yaml.org/
.csv .tsv .txt .tab text perspective/perspectiveViewer.load(text) https://en.wikipedia.org/wiki/Comma-separated_values https://en.wikipedia.org/wiki/Tab-separated_values
.dif .ods .xls .xlsb .xlsx .xlsm .xml .html binary/text js-xlsx/XLSX.read() See https://github.com/SheetJS/js-xlsx#file-formats for more info on Excel file formats

See Data Manager API & src/data.providers folder for data loading and saving imlementation details.

Provided Chart 📊 Types

  • Area Chart
  • Bar Chart
  • Candlesick Chart (d3fc only))
  • Heatmap
  • Line Chart
  • OHLC Chart (d3fc only)
  • Scatter Chart
  • Sunburst
  • Tree Map

Data Preview Chart Types

Supported Filter Functions

  • <, <=, ==, !=, >, >= for dates and number columns/fields
  • ==, !=, contains, in, not in, begins with, ends with for string fields and dictionaries
  • &, |, and, or, ==, != for bolean fields

Supported Aggregate Functions

  • any
  • avg
  • count
  • distinct count
  • dominant
  • first by index
  • last by index
  • last
  • high
  • low
  • mean
  • mean by count
  • median
  • pct sum parent
  • pct sum grand total
  • sum
  • sum abs
  • sum not null
  • unique

Recommended VSCode Extensions

Other extensions Data Preview 🈸 replaces, enhances or supplements for working with supported data file formats in VSCode:

Extension Description
Excel Viewer View Excel spreadsheets and CSV files
Avro Viewer .avro file viewer
avro-idl Avro IDL Syntax Highlighter
DotENV .env Syntax Highlighter
Ini for VSCode Provides outline view and section folding for INI files
Hjson Hjson language syntax support
JSON5 syntax Adds syntax highlighting of JSON5 files
NDJSON Colorizer Colorizes NDJSON (Newline Delimited JSON) files
YAML YAML Language Support by Red Hat, with built-in Kubernetes and Kedge syntax support
docs-yaml YAML schema validation and auto-completion for docs.microsoft.com authoring
YAML to JSON Convert YAML from clipboard or current document/selection to JSON and vice versa
Properties To Yaml Convert properties to yaml
Markdown Table Prettifier Transforms markdown tables to be more readable

Dev Log

See #DataPreview 🈸 tag on Twitter for the latest and greatest updates on this vscode extension and what's in store next.

Dev Build

$ git clone https://github.com/RandomFractals/vscode-data-preview
$ cd vscode-data-preview
$ npm install
$ code .

F5 to launch Data Preview extension VSCode debug session.


vscode-data-preview>vsce package

to generate VSIX Data Preview extension package from our latest for local dev install in VSCode.

Note: Use Help -> Toggle Developer Tools vscode menu option to view Data Preview console log.


Any and all test, code or feedback contributions are welcome.

Open an issue or create a pull request to make this Data Preview 🈸 extension work better for all.


SheetJS Aman Mittal
support me on ko-fi.com
Open Source Agenda is not affiliated with "Vscode Data Preview" Project. README Source: RandomFractals/vscode-data-preview

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