Free & open source · MIT

The pocket knife for text in your editor.

Format, convert, encode and decode without leaving VS Code. 47 tools for JSON, XML, YAML, Base64, URL, JWT, hashes, case conversion and more — one keystroke away, no browser tab, no pasting secrets into random websites.

Get it on VS Code Marketplace Open VSX
Or from the Quick Open bar (Cmd/Ctrl+P): ext install preekmr.dev-multitool
Try a tool
Multitool: JSON Format
Selection
{"name":"dev-multitool","tools":47,"tags":["json","jwt"]}
Replaced in place
{
  "name": "dev-multitool",
  "tools": 47,
  "tags": [
    "json",
    "jwt"
  ]
}

Stop alt-tabbing to online converters.

Every developer has a bookmark folder of "JSON formatter", "base64 decode" and "jwt.io". Dev Multitool puts all of them where your text already is — and keeps your tokens and payloads on your machine.

Right in the editor

Command Palette, a grouped picker on Cmd+Alt+Shift+D, or the right-click menu. Results replace your selection — undo with Cmd+Z.

Your text stays local

Everything runs inside VS Code. JWTs, API payloads and config never leave your machine — no web service in between.

Multi-cursor aware

Each selection is processed on its own. Put ten cursors on ten Base64 values and decode them all at once.

Bind anything to a key

Every tool is a real command. Map JSON Format to Cmd+Alt+J, or bind Repeat Last Tool and fly.

Three steps. Zero context switches.

  1. 01

    Select text

    Highlight a value, use several cursors, or select nothing to work on the whole file.

  2. 02

    Pick a tool

    Type base64, json format or jwt in the Command Palette — every tool is listed as Multitool: ….

  3. 03

    Get the result

    In place, in a new tab (JWT decode, URL parse), or as a notification with a Copy button (hashes, counts, validation).

47 tools, 13 categories.

The everyday conversions you reach for most — and new tools are a single function to add.

JSON

7 tools
  • Format
  • Minify
  • Sort Keys
  • Validate
  • Escape
  • Unescape
  • to YAML

XML & YAML

4 tools
  • XML Format
  • XML Minify
  • XML Validate
  • YAML to JSON

Base64

4 tools
  • Encode
  • Decode
  • URL-safe Encode
  • URL-safe Decode

URL

3 tools
  • Encode Component
  • Decode
  • Parse to JSON

JWT

1 tool
  • Decode header & payload
  • Expiry in human time

Hash

4 tools
  • MD5
  • SHA-1
  • SHA-256
  • SHA-512

HTML & Hex

4 tools
  • Escape entities
  • Unescape entities
  • Hex Encode
  • Hex Decode

Case

8 tools
  • camelCase
  • PascalCase
  • snake_case
  • CONSTANT_CASE
  • kebab-case
  • Title Case
  • UPPER
  • lower

Lines

7 tools
  • Natural sort ↑
  • Sort ↓
  • Remove duplicates
  • Reverse
  • Remove blanks
  • Trim
  • Count

Time & Generate

5 tools
  • Unix → ISO 8601
  • Date → Unix
  • Insert ISO timestamp
  • Insert Unix timestamp
  • UUID v4

Built for keyboard people.

Every tool has a command ID, so any of them can live on a shortcut. Pair that with Repeat Last Tool and the conversions you do fifty times a day become one chord.

  • Run Tool (Result in New Tab) keeps the original text untouched.
  • Formatters follow your editor — indentation is auto, tab, or any number of spaces.
  • Clear errors with line and column for invalid JSON and XML.
keybindings.json
[
  { "key": "cmd+alt+j", "command": "multitool.json.format" },
  { "key": "cmd+alt+b", "command": "multitool.base64.decode" },
  { "key": "cmd+alt+r", "command": "multitool.repeatLastTool" }
]

Privacy you can read in one screen.

Your text is processed locally and never sent anywhere. Anonymous usage telemetry helps find bugs, and it follows VS Code's own telemetry.telemetryLevel — set it to off and nothing is sent.

Read exactly what is collected →
Never sent
Your text or selections, error messages, file names, paths, workspace names, IP-based location
Sent, anonymously
Tool id, duration, success or error type, extension and VS Code version, OS
Dev Multitool icon

Put the whole toolbox in your editor.

Free, MIT-licensed and open source. Missing a tool you use every day? Adding one is a single function — pull requests welcome.

Install for VS Code Open VSX Star on GitHub