What is JSON Formatter?

JSON Formatter focuses on reading raw JSON in a browser without formatting or syntax highlighting. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is JSON Formatter for?

JSON Formatter is a consumer product built for firefox users and developers inspecting JSON data.

Does JSON Formatter have a free plan?

Yes — JSON Formatter is free to use.

What platforms does JSON Formatter run on?

JSON Formatter runs on the web, embeddable surfaces, and Android.

Is JSON Formatter still active?

Unverified. JSON Formatter has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to JSON Formatter?

Similar projects tracked by PulseGate include JSON-formatter, Basic JSON Formatter, and JSON Formatter.

Who makes JSON Formatter?

JSON Formatter is developed by json.

How long has JSON Formatter been around?

JSON Formatter first shipped in 2025.

Back to the index

JSON Formatter

Name: JSON Formatter
Author: json

mozilla.orgBrowser DevTools & extensions

JSON Formatter is a Firefox browser extension that formats JSON and applies automatic syntax highlighting when viewing JSON data. It is intended for developers and other Firefox users who need to inspect structured data more easily.

FreeWebEmbeddableAndroid

Visit mozilla.org

1alternative

5features

2025since

Overview

5 features

In the Browser DevTools & extensions space, JSON Formatter takes a focused approach. It focuses on reading raw JSON in a browser without formatting or syntax highlighting. JSON Formatter is a consumer product aimed at firefox users and developers inspecting JSON data. JSON Formatter is free to use. It ships for the web, embeddable surfaces, and Android.

Behind JSON Formatter is json, and it first shipped in 2025. Key capabilities include JSON formatting, syntax highlighting, and automatic highlighting. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

JSON formatting
Syntax highlighting
Automatic highlighting
Firefox integration
Android support

Built with & integrations

Runs on

BrowserEmbeddableAndroid

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed9 Sept · 12:26 UTC
JSON Formatter verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about JSON Formatter

What is JSON Formatter?: JSON Formatter focuses on reading raw JSON in a browser without formatting or syntax highlighting. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is JSON Formatter for?: JSON Formatter is a consumer product built for firefox users and developers inspecting JSON data.
Does JSON Formatter have a free plan?: Yes — JSON Formatter is free to use.
What platforms does JSON Formatter run on?: JSON Formatter runs on the web, embeddable surfaces, and Android.
Is JSON Formatter still active?: Unverified. JSON Formatter has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to JSON Formatter?: Similar projects tracked by PulseGate include JSON-formatter, Basic JSON Formatter, and JSON Formatter.JSON-formatter Basic JSON Formatter JSON Formatter
Who makes JSON Formatter?: JSON Formatter is developed by json.
How long has JSON Formatter been around?: JSON Formatter first shipped in 2025.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users and developers inspecting JSON data
Model: B2C
Solves: Reading raw JSON in a browser without formatting or syntax highlighting.

Registered as

Firefox Add-ons: json-formatter-ff

Developer

json

Index record

Indexed: 9 Sept 2026
Lifecycle: Alive
Last seen: 9 Sept 2026

Identity audit (13)

Slug: json-formatter-mozilla-org-1qjxj9
Lifecycle state recorded: 9 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 9 Sept 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 9 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/json-formatter-ff

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