Dev Multitool for VS Code

Format, convert, encode and decode text without leaving the editor. Select some text (or nothing, to use the whole file), open the Command Palette and type the tool name.

JSON – format, minify, sort keys, validate, escape/unescape, convert to YAML
XML – format, minify
YAML – convert to JSON
Base64 / Base64URL / Hex / URL / HTML entities – encode and decode
JWT – decode header and payload, show exp/iat as dates and whether the token has expired
Hash – MD5, SHA-1, SHA-256, SHA-512
Case – camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case, Title Case
Lines – sort (natural), remove duplicates, reverse, remove blanks, trim, count
Time / Generate – Unix ⇄ ISO 8601 conversion, insert timestamp, insert UUID

Install

VS Code: Visual Studio Marketplace, or search for "Dev Multitool" in the Extensions view.
VSCodium, Cursor, Windsurf, Gitpod and other editors using Open VSX: Open VSX.

Usage

How	What
Command Palette — `Cmd+Shift+P` (macOS) / `Ctrl+Shift+P`, or `Cmd+P` then type `>`	Type e.g. `base64`, `json format`, `jwt`. Every tool is listed as `Multitool: <Category> <Action>`.
Multitool picker — `Cmd+Alt+Shift+D` / `Ctrl+Alt+Shift+D`	All tools grouped by category in one searchable list (`Multitool: Run Tool…`).
Right-click menu	`Multitool` submenu with a submenu per category. Turn off with `multitool.contextMenu.enabled`.
Your own keybindings	Every tool is a command, so any of them can be bound to a key (see below).

What the tool works on:

Selections – each selection is processed separately, so multi-cursor works (e.g. Base64-decode ten values at once).
No selection – the whole document is processed.
Generators (UUID, timestamps) – insert at every cursor.

Where the result goes depends on the tool: most replace the text in place (undo with Cmd+Z), JWT decode and URL parse open the result in a new tab, hashes/validation/counts show a notification with a Copy button. Use Multitool: Run Tool (Result in New Tab)… to send any tool's result to a new tab instead of replacing. Multitool: Repeat Last Tool re-runs the last tool you used — a good one to bind to a key.

Keybindings

Open Preferences: Open Keyboard Shortcuts (JSON) and add entries using the command IDs from the table below:

[
  { "key": "cmd+alt+j", "command": "multitool.json.format", "when": "editorTextFocus" },
  { "key": "cmd+alt+b", "command": "multitool.base64.decode", "when": "editorTextFocus" },
  { "key": "cmd+alt+r", "command": "multitool.repeatLastTool", "when": "editorTextFocus" }
]

Or open Preferences: Open Keyboard Shortcuts, search for Multitool and click the + next to any tool.

Settings

Setting	Default	Description
`multitool.indent`	`"auto"`	Indentation for formatters: `"auto"` follows the editor, `"tab"`, or a number of spaces.
`multitool.contextMenu.enabled`	`true`	Show the Multitool submenu in the editor right-click menu.

All tools

Tool	Command ID (for keybindings)	Description
JSON Format	`multitool.json.format`	Pretty-print JSON using the editor indentation
JSON Minify	`multitool.json.minify`	Remove all insignificant whitespace
JSON Sort Keys	`multitool.json.sortKeys`	Sort object keys alphabetically (recursively) and pretty-print
JSON Validate	`multitool.json.validate`	Check whether the text is valid JSON
JSON Escape (Stringify)	`multitool.json.stringify`	Turn text into a JSON string literal: {"a":1} → "{"a":1}"
JSON Unescape (Parse String)	`multitool.json.unstringify`	Turn a JSON string literal back into its text
JSON to YAML	`multitool.json.toYaml`	Convert JSON to YAML
XML Format	`multitool.xml.format`	Pretty-print XML
XML Minify	`multitool.xml.minify`	Remove whitespace between tags
XML Validate	`multitool.xml.validate`	Check whether the text is well-formed XML
YAML to JSON	`multitool.yaml.toJson`	Convert YAML to JSON (multi-document YAML becomes an array)
Base64 Encode	`multitool.base64.encode`	Encode text (UTF-8) as Base64
Base64 Decode	`multitool.base64.decode`	Decode Base64 to text (UTF-8)
Base64 URL-safe Encode	`multitool.base64.urlEncode`	Encode text as Base64URL (no padding, - and _)
Base64 URL-safe Decode	`multitool.base64.urlDecode`	Decode Base64URL to text
URL Encode Component	`multitool.url.encode`	Percent-encode text for use in a query parameter or path segment
URL Decode	`multitool.url.decode`	Decode percent-encoded text (treats + as space)
URL Parse to JSON	`multitool.url.parse`	Break a URL into protocol, host, path and query parameters
JWT Decode	`multitool.jwt.decode`	Decode header and payload, show expiry in human time (no signature check)
Hash MD5	`multitool.hash.md5`	MD5 hex digest of the text (UTF-8)
Hash SHA-1	`multitool.hash.sha1`	SHA-1 hex digest of the text (UTF-8)
Hash SHA-256	`multitool.hash.sha256`	SHA-256 hex digest of the text (UTF-8)
Hash SHA-512	`multitool.hash.sha512`	SHA-512 hex digest of the text (UTF-8)
HTML Escape Entities	`multitool.html.encode`	Escape & < > " ' as HTML entities
HTML Unescape Entities	`multitool.html.decode`	Decode named and numeric HTML entities
Hex Encode	`multitool.hex.encode`	Text (UTF-8) to hexadecimal bytes
Hex Decode	`multitool.hex.decode`	Hexadecimal bytes to text (accepts spaces, 0x and : separators)
Case to camelCase	`multitool.case.camel`	Convert each line to camelCase (helloWorld)
Case to PascalCase	`multitool.case.pascal`	Convert each line to PascalCase (HelloWorld)
Case to snake_case	`multitool.case.snake`	Convert each line to snake_case (hello_world)
Case to CONSTANT_CASE	`multitool.case.constant`	Convert each line to CONSTANT_CASE (HELLO_WORLD)
Case to kebab-case	`multitool.case.kebab`	Convert each line to kebab-case (hello-world)
Case to Title Case	`multitool.case.title`	Convert each line to Title Case (Hello World)
Case to UPPERCASE	`multitool.case.upper`	Convert text to upper case
Case to lowercase	`multitool.case.lower`	Convert text to lower case
Lines Sort Ascending	`multitool.lines.sort`	Natural sort (file2 before file10)
Lines Sort Descending	`multitool.lines.sortDesc`
Lines Remove Duplicates	`multitool.lines.unique`	Keep the first occurrence of each line
Lines Reverse Order	`multitool.lines.reverse`
Lines Remove Blank Lines	`multitool.lines.removeBlank`
Lines Trim Whitespace	`multitool.lines.trim`	Trim leading and trailing whitespace on every line
Lines Count Lines, Words, Characters	`multitool.lines.count`
Time Unix Timestamp to ISO 8601	`multitool.time.unixToIso`	Seconds, milliseconds or microseconds are detected automatically
Time Date to Unix Timestamp (seconds)	`multitool.time.isoToUnix`	Any date string JavaScript can parse, e.g. 2024-05-01T10:00:00Z
Time Insert Current ISO Timestamp	`multitool.time.insertIso`
Time Insert Current Unix Timestamp	`multitool.time.insertUnix`
Generate UUID v4	`multitool.generate.uuid`	Insert a random UUID at each cursor

Privacy

Everything runs locally inside VS Code. No text is ever sent over the network. JWT decoding does not verify signatures.

Contributing

New tools are a single function. See CONTRIBUTING.md in the source repository.

License

MIT

Dev Multitool

Pradeep Balasubramaniam