Privacy-first JSON toolbox in your terminal. Format, validate, diff, query, and convert JSON without leaving the shell.
Privacy-first JSON tools in your terminal — every JSON tool from jsonzen.dev, runnable as a Unix filter.
npm i -g jsonzen
# or:
npx jsonzen format api.json --sort
Works with stdin/stdout so it composes with jq, curl, xargs, and anything
else in your shell.
curl -s https://api.example.com/users \
| jsonzen jq '$.data[*].email' \
| jsonzen format
jsonzen format [file] — pretty-print JSON. --indent 2/--indent 4,
--sort.jsonzen minify [file] — strip whitespace. Reports bytes saved on stderr.jsonzen validate <data> <schema> — validate JSON against a JSON Schema
(Ajv). Exits 3 on validation failure.jsonzen diff <left> <right> — semantic diff between two JSON files.
Exits 3 on differences.jsonzen jq <query> [file] — run a JSONPath expression.jsonzen jp <query> [file] — run a JMESPath expression.jsonzen jwt decode <token> — decode a JWT (header + payload, no
signature verification).jsonzen yaml [file] — convert between JSON and YAML. --to (default) or
--from.jsonzen csv [file] — convert between JSON arrays and CSV. --to
(default) or --from.jsonzen ts [file] — generate TypeScript type declarations (quicktype).jsonzen zod [file] — generate a Zod runtime validator.jsonzen pydantic [file] — generate Pydantic v2 BaseModel classes.jsonzen schema [file] — infer a JSON Schema (Draft 2020-12 or 07).[file] defaults to stdin. Pass - to be explicit.
-o, --output <file> — write to file instead of stdout.-q, --quiet — suppress non-error output (e.g. minify's bytes-saved report).--json — machine-readable error envelope:
{"error":{"kind":"...","message":"..."}} to stderr.-h, --help — per-command help with examples.-v, --version — print the CLI version.# Round-trip JSON through a sort + key-uniqueness pass.
echo '{"b":1,"a":[3,2,1]}' | jsonzen format --sort
# Generate a TypeScript declaration from an API response.
curl -s https://api.example.com/me | jsonzen ts -n MeResponse > me.types.ts
# Validate a config file in CI.
jsonzen validate ./app.config.json ./schemas/app.json --mode all-errors
# Diff two API responses, exit non-zero if they drifted.
jsonzen diff before.json after.json -o changes.json
Every command runs entirely on your machine. The CLI does not phone home and does not need a network connection. No account is required and nothing leaves your shell.
packages/cli)FAQs
Privacy-first JSON toolbox in your terminal. Format, validate, diff, query, and convert JSON without leaving the shell.
The npm package jsonzen receives a total of 0 weekly downloads. As such, jsonzen popularity was classified as not popular.
We found that jsonzen demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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