Free, browser-based utilities for everyday developer workflows
Shortcuts: Ctrl+Enter prettify · Ctrl+Shift+Enter minify

JSON Formatter & Validator

Data

Paste JSON, validate it, and format or minify it — all in your browser, nothing is sent to a server.

  • Validate JSON and show errors quickly.
  • Prettify or minify for readability or transport.
  • Sort keys for stable diffs and reviews.
  • Share results: Generate a secure link to share your current input and results with teammates — nothing is uploaded to any server.
All processing is local
INPUT Not validated

JSON Input

Stats: --
OUTPUT --

Output

Size: --

Validation & repair

Paste JSON and click Prettify to validate it.

JSON stats

Stats appear after successful parsing.

Suggested next steps

  • Validate JSON first to see matching next tools.

TypeScript interface

Infer TypeScript interface definitions from your JSON. Nested objects become their own interfaces; arrays become T[]. Generated locally in your browser.

How to use the JSON Formatter & Validator

Pretty-print, validate, beautify, or minify JSON for API debugging, log inspection, code review, configuration files, and incident reports. The JSON Formatter parses the input strictly, reports the exact line and column of any syntax error, and lets you sort keys, control indentation, and hand off the cleaned output to JSONPath, CSV, YAML, or schema validation in one click. Everything runs locally in your browser — payloads stay on your machine.

What it does

When to use it

How to use it

  1. Paste JSON into the editor (or load from clipboard / file).
  2. Pick an indentation: 2 spaces, 4 spaces, or tab.
  3. Click Prettify (or press Ctrl+Enter) to format. If the JSON is invalid, the error shows the exact line and a fix hint.
  4. Use Minify to collapse to one line; use Sort keys for stable diffs.
  5. Copy the result, download as a .json file, or hand off to a related tool.
  6. For schema validation, send the formatted JSON to the JSON Schema Validator.

Tips & pitfalls

FAQ

Runs locally in your browser. No uploads. Share links use an encrypted URL fragment.

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