Side by side

JSON Hero vs jsonfmt.dev

Both stand on json tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

JSON Hero

Free plan Web

Choose JSON Hero for browser-based JSON editing, validation, navigation, and comparison. Look elsewhere if you need password-protected share links or need Pro features now, since shared links are not password protected and Pro is not on sale yet.

Visit JSON Hero

jsonfmt.dev

Free plan APIWeb

jsonfmt.dev combines browser tools with an API for common JSON tasks, plus converters and related utilities. Check the API request limits and remember that shared-link contents are accessible to anyone who has the link.

Visit jsonfmt.dev

The facts

	JSON Hero	jsonfmt.dev
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Web	API, Web
Lowest paid plan	Pro (not on sale yet): $4.99 a month	Pro API: $9, paid once
Plans published	2	3
Maker	Not published	Not published
Website	jsonhero.dev	jsonfmt.dev
On json tools	#22 of 29	#18 of 29

JSON Hero: what it does well

Works in a modern browser with no sign-up or installation.
Processes common JSON tasks on the user's device.
Loads JSON from URLs, files, or the clipboard.
Compares documents with ignore rules and key-matched arrays.
Free plan has no ads.

What to know first

Free documents are limited to 100 KB.
Free share links are viewable by anyone who has the link.
Free shared data is deleted after seven days.
Pro is not on sale yet.

jsonfmt.dev: what it does well

Formatting offers indentation, key sorting, and depth controls
Reports JSON errors by line and column
Includes repair, comparison, conversion, and schema tools
Core browser tool can work offline after loading
Free API key allows 1,000 requests per month

What to know first

Anonymous API access is limited to 10 requests per minute
Anyone with a share link can access its JSON
Pro API costs $9, paid once

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