JSONZen
jsonzen.dev
What it is
JSONZen is a browser toolkit for formatting, validating, comparing, querying and converting JSON. Its tools also include minification, a tree view, JWT decoding and code generation for TypeScript, Zod, Pydantic v2 and JSON Schema. The site says core tools run in the browser and require no signup. Validation 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. Free share links allow up to 32 KB, and Free users can store three snippets locally per browser. Pro adds encrypted cloud-synced snippets, with manual syncing per snippet and a 2 MiB ciphertext limit per snippet. The listed Free plan is 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 lists paid plans from $5/mo. The CLI is included free.
Spec sheet
- What it does
- JSONZen provides browser tools for formatting, validating, diffing, querying, decoding JWTs and converting JSON.Read 15 Oct 2026 · jsonzen.dev
- Purpose
- JSONZen offers browser tools to format, validate, diff, query, and convert JSON.Read 30 Sep 2026 · jsonzen.dev
- Support
- The homepage invites users to suggest tools by emailing [email protected].Read 30 Sep 2026 · jsonzen.dev
- 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.Read 30 Sep 2026 · jsonzen.dev
- CLI
- The pricing page lists the CLI as included free and installable with npm i -g jsonzen.Read 30 Sep 2026 · jsonzen.dev
- CLI installation
- The CLI installs with npm, npx, pnpm or yarn and requires Node 20 or newer.Read 15 Oct 2026 · jsonzen.dev
- CLI licence
- Socket's package analysis identifies the jsonzen CLI as MIT licensed.Read 15 Oct 2026 · socket.dev
- CLI offline operation
- After installation, the CLI works offline and does not require a network connection.Read 15 Oct 2026 · jsonzen.dev
- CLI package activity
- Socket reports the jsonzen CLI package version 1.0.0, one maintainer and about nine weekly downloads.Read 15 Oct 2026 · socket.dev
- CLI portability
- The CLI documentation says it runs on Windows, macOS, Linux and WSL wherever Node 20+ runs.Read 15 Oct 2026 · jsonzen.dev
- CLI scripting
- CLI exit codes are documented and a --json option emits machine-readable error envelopes to stderr.Read 15 Oct 2026 · jsonzen.dev
- CLI update date
- Socket reports the CLI package was last updated on 20 May 2026.Read 15 Oct 2026 · socket.dev
- Client-side processing
- The maker says its core tools run entirely in the browser.Read 15 Oct 2026 · jsonzen.dev
- Code generation
- The toolset generates TypeScript, Zod, Pydantic v2 and JSON Schema from JSON samples.Read 15 Oct 2026 · jsonzen.dev
- Formatter
- The formatter pretty-prints JSON, reports line-accurate errors and can sort keys.Read 15 Oct 2026 · jsonzen.dev
- Free snippet limit
- Free users can store three snippets locally per device.Read 15 Oct 2026 · jsonzen.dev
- Integration
- The pricing page says jq query language is available as a Pro power tool.Read 30 Sep 2026 · jsonzen.dev
- Maker contact
- The homepage directs feature requests and support inquiries to [email protected].Read 15 Oct 2026 · jsonzen.dev
- Package adoption
- The npm listing reports 13 weekly downloads and one dependent for @jsonzen/core.Read 15 Oct 2026 · npmjs.com
- Package version
- The npm listing shows @jsonzen/core version 1.0.0 with three published versions.Read 15 Oct 2026 · npmjs.com
- Privacy positioning
- The homepage says there are no uploads, tracking or signup requirements for core tools.Read 15 Oct 2026 · jsonzen.dev
- Pro ciphertext limit
- Each Pro ciphertext is capped at 2 MiB, described as roughly 1.5 MB of plaintext.Read 15 Oct 2026 · jsonzen.dev
- Pro encryption
- Pro snippets are encrypted in the browser before upload and the server stores opaque ciphertext.Read 15 Oct 2026 · jsonzen.dev
- Pro sync behavior
- Cloud synchronization is manual per snippet and is available only on Pro.Read 15 Oct 2026 · jsonzen.dev
- Query languages
- JSONZen supports JSONPath and JMESPath queries, while jq is listed as a Pro power feature.Read 15 Oct 2026 · jsonzen.dev
- Remote references limit
- Remote HTTP $ref schemas are outside the validator's supported scope; referenced schemas must be pasted inline.Read 15 Oct 2026 · jsonzen.dev
- Repository activity
- GitHub lists 15 commits, seven pull requests and separate docs, source and tests directories for jsonzen-core.Read 15 Oct 2026 · github.com
- Repository popularity
- GitHub shows the jsonzen-core repository with zero stars and zero forks.Read 15 Oct 2026 · github.com
- Schema generation
- The JSON-to-JSON-Schema tool emits Draft 2020-12 by default and can switch to Draft 07.Read 15 Oct 2026 · jsonzen.dev
- Schema validation
- The validator uses Ajv 8 with ajv-formats and supports Draft 7, 2019-09 and 2020-12 schemas.Read 15 Oct 2026 · jsonzen.dev
- SDK documentation
- The repository README says public exports include JSDoc with parameters, return shapes and examples.Read 15 Oct 2026 · github.com
- SDK license
- The jsonzen-core repository identifies the package as MIT licensed.Read 15 Oct 2026 · github.com
- SDK package
- The public @jsonzen/core package exposes JSON, JWT, query, conversion, crypto, sharing and Result-type modules.Read 15 Oct 2026 · github.com
- SDK runtimes
- The core package is designed to run in browsers, Node, edge runtimes and workers without DOM or React dependencies.Read 15 Oct 2026 · github.com
- Semantic diff
- The diff tool compares parsed JSON structures and reports added, removed and modified values by JSON Pointer.Read 15 Oct 2026 · jsonzen.dev
- Share links
- Shareable URLs keep the payload in the URL fragment rather than on JSONZen servers.Read 15 Oct 2026 · jsonzen.dev
- Share revocation limit
- Share links are stateless and cannot be revoked or automatically expired.Read 15 Oct 2026 · jsonzen.dev
- Share-link limits
- Share links allow payloads up to 32 KB on Free and 256 KB on Pro.Read 30 Sep 2026 · jsonzen.dev
- Sharing
- Shareable JSON URLs keep their payload in the URL fragment, which the site says is not stored on its servers.Read 30 Sep 2026 · jsonzen.dev
- 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.Read 30 Sep 2026 · jsonzen.dev
- Sync behavior
- Pro snippet sync is manual per snippet, and the CLI does not connect to cloud accounts.Read 30 Sep 2026 · jsonzen.dev
- Team plan
- The pricing FAQ says there is no team tier yet.Read 15 Oct 2026 · jsonzen.dev
- Tool coverage
- Tools include JSON formatting, schema validation, minification, tree view, semantic diff, JSONPath and JMESPath queries, JWT decoding, and conversions.Read 30 Sep 2026 · jsonzen.dev
- Tree viewer
- The tree viewer provides collapsible, raw and graph views, with graph navigation by pan, zoom and click.Read 15 Oct 2026 · jsonzen.dev
- Validation limit
- The validator documentation says inputs up to about 10 MB can be handled without lag.Read 15 Oct 2026 · jsonzen.dev
Plans and prices
Free Free Forever 32 KB share links · 3 locally stored snippets per device · all JSON tools · CLI included Read 15 Oct 2026 · jsonzen.dev
Pro $1, paid once 30 days · launch promo; normal monthly price $5; no auto-charge 256 KB share payload · unlimited encrypted cloud snippets · password-protected shares · larger-file tree viewer · jq and power tools Read 15 Oct 2026 · jsonzen.dev
Strong points and limits
Strong points
- Core tools run in the browser
- No signup required for browser tools
- Schema validation reports errors by path
- Free CLI included
- Share links keep payloads in the URL fragment
Limits
- Free users can store three local snippets per browser
- Free share links cap payloads at 32 KB
- Pro snippet sync is manual per snippet
Who it suits
JSONZen suits people who need browser-based tools for JSON formatting, validation, queries or conversion without signing up. Developers who want locally stored snippets, share links or CLI access can also use the listed Free plan.
Verdict
JSONZen covers common JSON tasks in the browser and includes validation, query and code-generation tools. Check the different snippet and share-link limits, and note that the listed Pro promotion differs from the pricing note’s starting price.
Where Specifiction places it
- JSON Tools#3 of 298.7
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