JSONZen

Summary

JSONZen is a browser-based toolkit for formatting, validating, minifying, comparing, querying, and converting JSON. Its core tools run in the browser, and the site says they require no signup. Other tools include a tree view, JWT decoding, and code generation for TypeScript, Zod, Pydantic v2, and JSON Schema. The validator supports JSON Schema drafts 07, 2019-09, and 2020-12 and reports errors by path. Queries can use JSONPath and JMESPath; jq querying is listed as a Pro tool. Share links place their payload in the URL fragment rather than on JSONZen’s servers, with limits of 32 KB for Free and 256 KB for Pro. Free users can store three snippets locally per browser. Pro offers encrypted cloud-synced snippets, synced manually one at a time, with a 2 MiB ciphertext limit per snippet. The CLI is included free and can be installed with npm i -g jsonzen. Free is listed at 0.00 USD per free, billed Forever. Pro is listed at $1.00 USD once for 30 days as a launch promotion, with no auto-charge; the pricing note says paid plans start at $5/mo.

Who it is for

JSONZen suits people who want browser tools for common JSON tasks without signing up. Its Free plan fits light local snippet storage, while Pro adds cloud-synced snippets and larger share links.

Compared on JSON tools

Free plan

Yesjsonzen.dev

Paid from

$5/mojsonzen.dev

Schema validation

Yesjsonzen.dev

JSONPath querying

Yesjsonzen.dev

jq querying

Yesjsonzen.dev

JSON diff and compare

Yesjsonzen.dev

Available platforms

Webjsonzen.dev

Facts

Purpose

JSONZen offers browser tools to format, validate, diff, query, and convert JSON.jsonzen.dev · 30 Sept 2026

Client-side processing

The site says every core tool runs in the browser and describes its tools as 100% client-side.jsonzen.dev · 30 Sept 2026

Tool coverage

Tools include JSON formatting, schema validation, minification, tree view, semantic diff, JSONPath and JMESPath queries, JWT decoding, and conversions.jsonzen.dev · 30 Sept 2026

Code generation

JSONZen can generate TypeScript, Zod, Pydantic v2, and JSON Schema from JSON or schemas.jsonzen.dev · 30 Sept 2026

Sharing

Shareable JSON URLs keep their payload in the URL fragment, which the site says is not stored on its servers.jsonzen.dev · 30 Sept 2026

Pro encryption

Pro snippets are encrypted in the browser before upload, and the server stores opaque ciphertext that JSONZen says it cannot decrypt without the passphrase.jsonzen.dev · 30 Sept 2026

Sync behavior

Pro snippet sync is manual per snippet, and the CLI does not connect to cloud accounts.jsonzen.dev · 30 Sept 2026

Snippet limits

Free users can store three snippets locally per browser, while Pro has no snippet-count cap and a per-snippet ciphertext limit of 2 MiB.jsonzen.dev · 30 Sept 2026

Share-link limits

Share links allow payloads up to 32 KB on Free and 256 KB on Pro.jsonzen.dev · 30 Sept 2026

CLI

The pricing page lists the CLI as included free and installable with npm i -g jsonzen.jsonzen.dev · 30 Sept 2026

Support

The homepage invites users to suggest tools by emailing [email protected].jsonzen.dev · 30 Sept 2026

Account and signup

The homepage says the browser tools require no signup, and the pricing page advertises three months of Pro free with no card required for sign-up.jsonzen.dev · 30 Sept 2026

Integration

The pricing page says jq query language is available as a Pro power tool.jsonzen.dev · 30 Sept 2026

Where it ranks on Everything Xiaomi

• Best JSON Tools in 2026#5 of 29

Sources

• jsonzen.dev· checked 30 Sept 2026
• jsonzen.dev/pricing· checked 30 Sept 2026