JSON formatter & validator
Paste minified API responses, config files, or webhook payloads — then format, minify, or validate with one click. Everything runs in your browser; your JSON is never uploaded to our servers.
Tip: Ctrl+Enter (Windows) or Cmd+Enter (Mac) formats.
Looking good. CloudyBot can call that API, read the JSON response, extract the fields you care about, and notify you when something changes — on a schedule, with a real cloud browser. No glue code required.
Try CloudyBot FreeFree plan · No credit card · 60-second setup
How it works
JSON (JavaScript Object Notation) is the lingua franca of modern APIs, configuration files, and event payloads. Services return compact, single-line JSON to save bandwidth; developers paste those blobs into tickets, logs, and chat. Reading that without whitespace is painful — and a single stray comma or mismatched brace can break the entire document.
This tool uses your browser’s built-in JSON.parse and JSON.stringify. When you click Format, we parse your text into a JavaScript value and write it back with indentation so objects and arrays line up visually. Minify does the opposite: it removes all non-essential whitespace so you can drop the result into a request body or storage. Validate runs the parser only and tells you whether the document is legal JSON — useful before you commit a config or deploy a webhook handler.
Because nothing is sent to CloudyBot’s servers, you can safely paste responses that contain internal field names, staging URLs, or other sensitive structure. (You should still avoid pasting live secrets into any website if your security policy forbids it — but technically, this page never transmits your input.) If you need the same workflow automated — polling an endpoint, diffing responses, alerting Slack or email — that is what the full CloudyBot product is for.
Common use cases
- Debug a minified API response from Chrome DevTools, curl, or Postman — format it to see nesting and typos.
- Validate config before commit —
package.json,tsconfig.json, CI matrices, and ESLint configs must be strict JSON (or JSON superset); catch errors early. - Prettify exports from databases, log aggregators, or “download as JSON” buttons in SaaS dashboards.
- Minify payloads before embedding in a mobile app or IoT bundle where every byte counts.
- Teach or document APIs — readable examples in README files and internal wikis.
- Sanity-check webhooks — Stripe, GitHub, and Shopify send JSON bodies; validate samples before writing signature verification code.
You just formatted JSON. CloudyBot can fetch it for you.
Example: “Every morning at 8am, call our /api/status endpoint, parse the JSON, and message me if degraded is true.” CloudyBot runs in the cloud with a real browser session, rolling memory, and optional schedules — so you are not manually pasting into tools forever.
Free plan · No credit card · 60-second setup
JSON formatter, beautifier, and linter in one
People search for an online JSON formatter, JSON beautifier, JSON minifier, and JSON syntax checker depending on the job. This page does all of those: turn a single-line API response into readable structure, shrink a large document for transport, or confirm that a file is valid before you commit it. If you are comparing JSON pretty print tools, the differentiator here is privacy (client-side processing) and a clear path to CloudyBot when you want the same data checks automated on a schedule instead of repeated manual pastes.
Frequently asked questions
Is this JSON formatter free?
Yes. There is no signup, no usage counter, and no paywall. Use it as often as you like.
Is my JSON sent to your servers?
No. Format, minify, and validate run entirely in your browser. Open DevTools → Network and you will see no request carrying your paste when you use those actions.
What is the difference between Format and Minify?
Format (beautify) adds line breaks and indentation for readability. Minify removes whitespace that JSON does not need, producing the smallest valid equivalent string.
What kinds of errors can this validator catch?
Any syntax error that JavaScript’s JSON.parse rejects: trailing commas, missing quotes around keys, single-quoted strings (JSON requires double quotes), stray tokens, and unclosed brackets or braces. The error line and column are shown when the browser provides them.
Can I paste large JSON or full API responses?
Yes. Everything runs locally in your tab; very large pastes may feel slow on older devices. For huge logs, consider splitting the file or using a desktop editor — but nothing is uploaded to CloudyBot when you format, minify, or validate.
What is CloudyBot?
CloudyBot is a hosted AI agent that can browse the web, use files, remember context across conversations, and run tasks on a schedule — with hard billing caps so you never get surprise overages. This formatter is a small, trustworthy utility; the product is for when you want the machine to do the repetitive work instead of watching you paste JSON.
Related tools
More free tools are on the roadmap. For now, explore the product or compare plans:
Try CloudyBot on the free plan
30 AI Tasks / month · 2 browser sessions (10 min) · 50 MB storage · 7-day chat history
Start free — no credit card