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Tech riderRev. 2 Oct 2026

jsonfmt.dev

Ch 067.0of 29 JSON Tools
  1. 1Runs onAPI, Web
  2. 2CostsFree plan
  3. 3Schema validationYes
  4. 4JSONPath queryingYes
  5. 5jq queryingNo
  6. 6Batch processingYes
  7. 7JSON diff and compareYes
  8. 8Available platformsWeb, API, chrome extension
8 lines stated Written from the maker's own pages: jsonfmt.dev, api.jsonfmt.dev
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The jsonfmt.dev homepage

Overview

jsonfmt.dev is ranked #6 of 29 in JSON tools on Specifiction. It runs on API, Web. There is a free plan.

jsonfmt.dev plans and pricing

All plans
Free API key Free With API key 100 requests/minute · all endpoints · 1,000 requests/month · email support api.jsonfmt.dev · 2 Oct 2026
Anonymous API Free No sign-up required 10 requests/minute · all endpoints · no monthly limit · community support api.jsonfmt.dev · 2 Oct 2026
Pro API $9 once Pay once, Pro forever 1,000 requests/minute · all endpoints · 50,000 requests/month · priority support api.jsonfmt.dev · 2 Oct 2026

Compared on JSON tools

Free plan
Yesjsonfmt.dev
Schema validation
Yesjsonfmt.dev
JSONPath querying
Yesjsonfmt.dev
jq querying
Nojsonfmt.dev
Batch processing
Yesjsonfmt.dev
JSON diff and compare
Yesjsonfmt.dev
Available platforms
Web, API, chrome_extensionjsonfmt.dev

Facts

Product
jsonfmt.dev describes itself as a free online JSON formatter, beautifier, and validator.jsonfmt.dev · 2 Oct 2026
Formatting
The formatter supports 2-space, 4-space, or tab indentation, optional key sorting, and depth control.jsonfmt.dev · 2 Oct 2026
Validation
The site says it validates JSON against RFC 8259 and reports precise line and column errors.jsonfmt.dev · 2 Oct 2026
Repair and diff
Its tools can repair common malformed JSON and compare two documents, highlighting added, removed, and changed fields.jsonfmt.dev · 2 Oct 2026
Conversion
The site lists converters for formats including YAML, CSV, XML, TypeScript, SQL, GraphQL, and Protobuf.jsonfmt.dev · 2 Oct 2026
Other tools
The web toolkit also includes a JWT decoder, JSON Schema validator, JSONPath evaluator, and JSONL tools.jsonfmt.dev · 2 Oct 2026
Offline use
The site says it works offline after loading and can be installed as a Progressive Web App.jsonfmt.dev · 2 Oct 2026
Privacy
The maker says the core web tool processes JSON locally in the browser and does not send JSON content to its servers.jsonfmt.dev · 2 Oct 2026
Share links
Share links encode JSON in the URL fragment, which the policy says is not sent in HTTP requests; anyone with the link can access its contents.jsonfmt.dev · 2 Oct 2026
Analytics and ads
The privacy policy says the site uses Google Analytics and Google AdSense, which may use cookies; it also says local tool preferences and session data are kept in browser localStorage.jsonfmt.dev · 2 Oct 2026
API access
The API accepts JSON over HTTPS and offers formatting, minifying, validation, repair, diffing, conversion, and other endpoints.api.jsonfmt.dev · 2 Oct 2026
API limit
Unauthenticated API use is limited to 10 requests per minute; the documentation lists a free API-key tier at 100 requests per minute and 1,000 requests per month.api.jsonfmt.dev · 2 Oct 2026
Integrations
The maker describes an MCP server package, jsonfmt-mcp, that exposes JSON-processing tools to MCP-compatible AI clients.jsonfmt.dev · 2 Oct 2026
Support
The API pricing lists community support for anonymous access, email support for the free key tier, and priority support for Pro.api.jsonfmt.dev · 2 Oct 2026

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Where it ranks on Specifiction

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