If you work with APIs, config files, or messy data exports, you’ve probably been here before: paste JSON into one tool to pretty-print it, open another to convert YAML, jump to a third to decode a JWT, and still end up writing a throwaway script just to answer one question about your payload.
JSON Explorer brings that workflow into one place. It’s a free web app where you can explore, edit, query, and convert structured data — entirely in your browser, with no account required.
Try it: codefrydev.in/JsonPlayground
What is JSON Explorer?
JSON Explorer (also known as JSON Playground) is a developer-focused workspace for working with structured data. At its core, it lets you:
- Paste and explore JSON (and other formats) in a clear, navigable way
- Run JavaScript against your data and see results instantly
- Convert between common formats in side-by-side panels
- Share your work via a link — useful for debugging with teammates or saving a reproducible example
Everything runs client-side in your browser. Your data isn’t sent to a server for processing, and you don’t need to sign up to use it.
Built for real debugging, not just pretty-printing
Many JSON tools stop at formatting. JSON Explorer is meant for the next step: understanding and manipulating data.
Explore with a tree view
Switch from raw text to an interactive tree. Browse nested objects and arrays, copy paths to specific fields, and use those paths when writing queries or snippets. When a payload is large or deeply nested, the tree view makes it much easier to orient yourself.
Query your data with JavaScript
The playground includes a code panel where your JSON is available as data. Write small JavaScript snippets to filter, transform, or inspect values — then see output immediately. You can use a simple Dump() helper to display results, or rely on console-style logging. There’s also support for LINQ-style querying for familiar, expressive data operations.
See what happened in the output panel
Results land in a dedicated output area that shows:
- Returned values and logs
- Errors when something goes wrong
- Execution time
- The shape of your data (object, array, length, and so on)
That feedback loop makes it practical for quick experiments — “what if I filter by this field?” or “what does this nested path actually return?” — without spinning up a local script.
Format, load, and share
Common actions are built in:
- Format or minify JSON
- Load from a file or fetch from a URL (when the source allows it)
- Generate a shareable link that encodes your JSON and code so someone else can open the same state
- Restore your last session when you come back
Snippets and autocomplete based on your JSON structure help you move faster when writing queries.
Seven dedicated playgrounds
JSON Explorer isn’t only about JSON. The home page groups tools into focused playgrounds:
| Playground | What you can do |
|---|---|
| JSON | Paste JSON, explore the tree, run JavaScript, convert to XAML |
| XAML | Edit XAML, view the tree, run JavaScript, convert to JSON |
| YAML | Edit YAML, see the parsed tree, convert to JSON |
| CSV | Edit CSV, preview as a table, convert to JSON |
| TOML | Edit TOML, view the parsed tree, convert to JSON |
| .env | Edit key=value pairs and see a JSON preview |
| JWT | Decode tokens, inspect header and payload, or encode and sign new ones |
The JWT Playground is especially handy for API work: paste a token to read its claims, verify it with a secret, or build a new token from header and payload JSON.
Instant format converters
For quick one-off conversions, dedicated converter pages use a simple two-panel layout: paste on one side, see the result on the other.
Supported conversions include:
- XAML ↔ JSON
- YAML ↔ JSON
- CSV ↔ JSON
- TOML ↔ JSON
- XML ↔ JSON
- .env ↔ JSON
No upload step, no export button dance — just paste and copy.
Who is it for?
JSON Explorer is a good fit if you:
- Debug API responses and want to explore structure before writing app code
- Work with config files in YAML, TOML, or
.envand need a fast JSON view - Prototype data transformations without opening an IDE
- Inspect JWTs during auth integration
- Convert between formats during migrations or documentation
- Share a reproducible example with a colleague via URL
It’s designed for desktop use, where the multi-panel layout and resizable workspaces shine. Open it on a laptop or monitor for the best experience.
Free, private, and frictionless
Three things set JSON Explorer apart from heavier tools:
- No sign-up — open the link and start working
- Runs in the browser — processing stays on your machine
- Free — no paywall for core features
For sensitive payloads (tokens, internal API data, customer records), that client-side model matters. You still shouldn’t paste production secrets into any online tool without your team’s policy allowing it — but JSON Explorer is built so you’re not forced to create an account or upload files to a backend just to format or query JSON.
Get started in seconds
- Open codefrydev.in/JsonPlayground
- Pick a playground (JSON, YAML, JWT, etc.) or a converter
- Paste your data
- Explore, query, convert, or share
No install, no login, no setup.
The bottom line
JSON Explorer is more than a formatter. It’s a lightweight workspace for developers who live in structured data — whether that’s a REST response, a config file, a CSV export, or a JWT from your auth flow. Tree exploration, live JavaScript queries, format conversion, and shareable state come together in one free browser tab.
If you’ve been juggling multiple single-purpose tools for JSON work, it’s worth bookmarking.