Best JSONLint Alternatives

JSONLint is a handy online JSON validator and formatter, but users often want offline tools, richer editing, or features like schema validation and querying. Developers seek faster or more capable JSON utilities.

12 alternativesDeveloper ToolsUpvote the ones you rate — the list re-ranks by votes.
1
#1

JSON Formatter & Validator (FreeFormatter)

Free

Online tool to format, validate, and beautify JSON documents.

Web
2
#2

JSON Editor Online

Freemium

Web-based JSON editor with tree view, formatting, and query tools.

Web
3

Lightweight, extensible code editor with strong Swift and mobile tooling support.

WindowsmacOSLinux
#4

jq

Open Source

Command-line JSON processor for filtering, transforming, and querying data.

WindowsmacOSLinux
#5

JSONLint Pro / JSON Lint (CodeBeautify)

Free

Online JSON validator, formatter, and viewer with many related tools.

Web
#6

JSON Crack

Freemium

Tool that visualizes JSON data as interactive graphs and diagrams.

Web
#7

Postman

Freemium

API platform that formats, validates, and inspects JSON responses.

WindowsmacOSLinuxWeb
#8

Insomnia

Freemium

Open-source API client for REST, GraphQL, and gRPC with a clean UI.

WindowsmacOSLinux
#9

JSON Formatter (Curious Concept)

Free

Online JSON formatter and validator with error highlighting.

Web
#10

Notepad++

Open Source

Lightweight source code editor for Windows with syntax highlighting.

Windows
#11

Dadroit JSON Viewer

Freemium

Fast desktop viewer for opening and searching very large JSON files.

WindowsmacOSLinux
#12

JSONHero

Open Source

Open-source web tool for viewing and exploring JSON files clearly.

Web

Know a JSONLint alternative we missed? Suggest it — we review submissions before they go live.

More alternatives