JSONZen is a browser-based toolkit for formatting, validating, minifying, comparing, querying, and converting JSON. Its core tools run in the browser and require no signup. The toolkit also includes 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, with errors reported 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 keep three snippets locally per browser. Pro adds encrypted cloud-synced snippets, but syncing is manual per snippet and each snippet has a 2 MiB ciphertext limit. The CLI is included free. The listed Free plan is 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-based tools for editing, checking, querying, and converting JSON without signing up. Users needing more snippet storage or larger share links may consider Pro.
What is good
- Core tools run in the browser
- Supports three JSON Schema drafts
- Free CLI included
- Share-link payloads stay in URL fragments
What to know first
- Free share links limited to 32 KB
- Free local storage limited to three snippets per browser
- Pro snippet syncing is manual per snippet
Verdict
JSONZen covers common JSON tasks in a browser and includes schema validation, query tools, and code generation. Check the snippet and share-link limits, and note the listed Pro promotion alongside the pricing note of $5/mo.
JSONZen plans and pricing
All plansCompared on JSON tools
- Free plan
- Yes
- Paid from
- $5/mo
- Schema validation
- Yes
- JSONPath querying
- Yes
- jq querying
- Yes
- JSON diff and compare
- Yes
- Available platforms
- Web
