JSON-LD Playground
JSON-LD Playground is a free web tool for experimenting with JSON-LD markup: enter JSON and inspect the generated output.
What JSON-LD Playground is
JSON-LD Playground is a free web tool for experimenting with JSON-LD markup: enter JSON and inspect the generated output. Examples cover Person, Event, Place, Product, Recipe, Library, and Activity data. Output views include Expanded, Compacted, Flattened, Framed, N-Quads, Canonized, Table, Visualized, and Signatures; processing modes include Default, JSON-LD 1.0, and JSON-LD 1.1. Inputs let users work with document, context, and frame URLs or create a new context and frame. The tool uses jsonld.js, which its page says conforms to the JSON-LD Syntax and API specifications. The interface supports keyword completion with the @ key and context-key completion with Ctrl+Space. The site presents the Playground as useful for learning, debugging, visualizing, and sharing markup. It warns about some remote contexts and suggests an alternative community context. RSA and Bitcoin signature demos are temporarily unavailable, with a related demo pointed to on the Verifiable Credentials Playground. Website content is dedicated to the public domain under CC0 except where another license is specified.
Good
- Includes examples for seven types of data.
- Offers multiple output views and processing modes.
- Provides context and frame inputs.
- Editor shortcuts complete JSON-LD keywords and context keys.
Watch out
- RSA and Bitcoin signature demos are temporarily unavailable.
- Some remote contexts may not be fully working.
Who it suits
The Playground suits people learning JSON-LD and developers who want to inspect or share markup in a browser. Its examples and multiple output views help users explore different representations.
Verdict
JSON-LD Playground brings examples, processing modes, and several inspection views together in a web interface. Note that the listed signature demos are unavailable and some remote contexts may need attention.
The facts
Each one read from JSON-LD Playground's own pages, with the date it was checked.
Where it runs
- Browser-based editor
- The repository says the new playground is built with CodeMirror 6 and integrated into its UI using petite-vue.checked 9 Oct 2026
What it does
- Content license
- The playground page says website content is released under the Creative Commons CC0 Public Domain Dedication except where an alternate is specified.checked 9 Oct 2026
- Context and frame inputs
- The interface includes inputs for a new JSON-LD context and a JSON-LD frame.checked 9 Oct 2026
- Contexts and frames
- The interface includes inputs for a document URL, context URL, frame URL, and a new JSON-LD context and frame.checked 4 Oct 2026
- Editor
- The repository says the Playground editor is built with CodeMirror 6 and integrated into the surrounding UI using petite-vue.checked 4 Oct 2026
- Editor shortcuts
- The @ key autocompletes JSON-LD keywords, and Ctrl+Space autocompletes available keys in @context.checked 9 Oct 2026
- Examples
- Built-in examples include Person, Event, Place, Product, Recipe, Library, and Activity.checked 9 Oct 2026
- Hosting
- The repository says the site is deployed using Cloudflare Pages and that the playground has a special proxy for HTTP URLs.checked 9 Oct 2026
- Integrations
- The repository identifies Cloudflare Pages as the site deployment platform and says the site is published using Eleventy.checked 4 Oct 2026
- Intended users
- The JSON-LD site describes the playground as useful for people learning JSON-LD and for developers debugging, visualizing, and sharing markup.checked 9 Oct 2026
- License
- The Playground page says the website content is released under the Creative Commons CC0 Public Domain Dedication except where an alternate is specified.checked 4 Oct 2026
- Processing modes
- The playground offers Default, JSON-LD 1.0, and JSON-LD 1.1 processing modes.checked 9 Oct 2026
- Processing views
- The page lists Expanded, Compacted, Flattened, Framed, N-Quads, Normalized, and Visualized output views.checked 4 Oct 2026
- Processor
- The playground uses jsonld.js, which conforms to JSON-LD 1.1 syntax, API, and framing specifications.checked 9 Oct 2026
- Proxy
- The project repository says the Playground has a special proxy to handle http: URLs.checked 4 Oct 2026
- Purpose
- The playground lets users enter JSON-LD markup and see the generated output.checked 9 Oct 2026
- Related tools
- The site links to a classic JSON-LD 1.0 Playground, RDF Distiller, and Verifiable Credentials Playground.checked 9 Oct 2026
- Remote contexts
- The playground warns when it detects a remote context that is not known to be fully working and suggests an alternative community context.checked 9 Oct 2026
- Sharing
- The main JSON-LD site describes the Playground as a tool developers can use to debug, visualize, and share JSON-LD markup.checked 4 Oct 2026
- Signature demo limit
- The page says RSA and Bitcoin signature demos are temporarily unavailable as of 2022-08-25 and points to the Verifiable Credentials Playground for a related demo.checked 9 Oct 2026
- Signing
- The Playground page lists options to sign with RSA and Bitcoin.checked 4 Oct 2026
- Support
- The JSON-LD site says anyone may join the Community Group, participate on its mailing list, join discussion calls, and collaborate on projects.checked 4 Oct 2026
- Transformations
- The output options include Expanded, Compacted, Flattened, Framed, N-Quads, Canonized, Table, Visualized, and Signatures.checked 9 Oct 2026
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