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JSON Hero

JSON Hero is a web-based workspace for handling JSON documents.

Place
#11 of 29
Score
6.5
JSON Hero's website

What JSON Hero is

JSON Hero is a web-based workspace for handling JSON documents. It can format, minify, validate, view, search, edit, compare, and share JSON directly in a modern browser, with no installation or sign-up required. Pretty-printing includes syntax highlighting, strict parsing, and tolerant parsing for malformed input. A collapsible tree, line numbers, bracket highlighting, and live highlighted search help you move through documents. JSON can be imported from a public URL, local file, or clipboard, then downloaded in formatted or minified form. Comparison supports ignore rules, matching arrays by key, and compatibility reporting. Local processing for formatting, minifying, validation, searching, folding, unescaping, and downloading stays on your device. Creating a share link uploads the JSON; anyone with the link can view it, and links are not password protected. The free plan supports documents up to 100 KB, with shared data deleted after seven days. Pro is listed at $4.99 a month but is not on sale yet.

Good

  • Runs in a modern browser without installation
  • Supports strict and tolerant JSON parsing
  • Imports from URLs, files, or clipboard
  • Local processing keeps JSON on-device
  • Provides tree navigation and live search

Watch out

  • Free documents are limited to 100 KB
  • Shared links are not password protected
  • Free shared data expires after seven days
  • Pro is not on sale yet

Who it suits

It suits developers and other users who need browser-based JSON inspection and editing without installing software. It is also useful when local processing or share links are important.

Verdict

JSON Hero combines broad JSON editing and inspection tools in a browser interface. The free plan covers core local work, while sharing uploads data and Pro availability is still pending.

Plans and prices

From JSON Hero's own pricing page, checked 9 Oct 2026.

All about pricing
PlanPriceWhat it gives you
FreeFree100 KB per document · links expire after 7 days · 30 shares per hour · 100 shares per day · no ads · Forever. No account required.
Pro (not on sale yet)$4.99 a month1 MB per document · share links last 7, 30, or 90 days, or until deleted · 500 shares per day · priority email replies · Monthly or annually; the page says Pro is not on sale yet.

The facts

Each one read from JSON Hero's own pages, with the date it was checked.

What it does

Availability
The pricing page says Pro is not on sale yet and offers email notification when it opens.checked 9 Oct 2026
Comparison
Users can compare two JSON documents with ignore rules, arrays matched by key, and a compatibility report.checked 9 Oct 2026
Formatting
It pretty-prints JSON with syntax highlighting and supports strict and tolerant parsing for malformed JSON.checked 9 Oct 2026
Import and export
Users can load JSON from a public URL, a local file, or the clipboard, and download formatted or minified JSON.checked 9 Oct 2026
Local processing
Formatting, minifying, validating, searching, folding, unescaping, and downloading run on the user's device; this JSON is not uploaded.checked 9 Oct 2026
Navigation and search
It provides a collapsible tree, line numbers, bracket highlighting, and real-time search with highlighted matches.checked 9 Oct 2026
Pro comparison tools
Pro removes comparison rule limits, saves rule presets in the browser, and exports comparisons as JSON Patch, unified diff, or Markdown.checked 9 Oct 2026
Purpose
JSON Hero is an online tool for formatting, minifying, validating, viewing, searching, editing, comparing, and sharing JSON.checked 9 Oct 2026
Share limits
The free plan allows up to 100 KB per document, 30 new links per hour, and 100 per day; Pro allows up to 1 MB and 500 links per day.checked 9 Oct 2026
Sharing and security
Creating a share link uploads the JSON; anyone with the link can view it, links are not password protected, and the free-plan data is deleted after 7 days.checked 9 Oct 2026
Support
Pro includes priority replies by email at [email protected].checked 9 Oct 2026

Money

Billing
The pricing page says prices are per person, taxes are included, Indian customers are billed in rupees, and everyone else in US dollars.checked 9 Oct 2026

Where it runs

Browser based
The editor runs in a modern browser with no sign-up or installation required.checked 9 Oct 2026

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