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Developer

JSON Validator widget for Windows

Paste JSON, find out immediately whether it is valid, and get it formatted. Set the indent size, sort keys if you are diffing two payloads, and switch to compact one-line mode when you need it small again. It runs locally, which matters when the payload is not yours to paste into a website.

Free · Windows 10 and 11 · No account required

JSON Validator
Valid JSON · 5 keys · 112 bytes

The real JSON Validator widget, running live. Drag it around.

What it’s for

What JSON Validator is good for

The everyday jobs this widget was built to handle.

Check a payload without pasting it into an online formatter

Sort keys to make two responses diffable

Format a minified blob into something readable

Settings

Every JSON Validator setting

7 options, set per widget - so two copies of JSON Validator on the same dashboard can behave completely differently. Highlighted values are the defaults.

Indent size

24

Sort keys

OnOff

Show line numbers

OnOff

Advanced

Auto format

OnOff

Compact one line

OnOff

Theme

defaultmonochrome

Allow full screen

OnOff
Setup

Getting JSON Validator on your desktop

  1. 01

    Install

    Download and run the installer. No account, no sign-in.

  2. 02

    Add the widget

    Hit Add Widget, or press Ctrl+K and search for it by name.

  3. 03

    Make it yours

    Drag it where you want, resize it, and set the options below.

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JSON Validator is one of 83 widgets

They all live on the same customizable dashboard, with themes, multiple screens, and native Windows notifications. Free.

Download for WindowsPaul's Dashboard on Windows with clock, calendar, todo list and quick notes widgets arranged on one screen - JSON Validator sits on the same canvas.