kbwen Lab

JSON Formatter

Format JSON, catch syntax errors fast, and keep the repair hint close.

Input

Paste raw JSON, then format or minify in place.

0 chars Ctrl/Cmd + Enter

Paste JSON to start.

Result

Read the output or inspect the parse issue.

Ready for a payload

Try the example for a quick pass or paste malformed JSON to inspect an error.

Line - Column - Hint: waiting for input
0 lines 0 bytes Depth 0 0 keys

How to use

Paste raw JSON, format or minify it, then copy the output or inspect the line and column hint if parsing fails.

Examples: prettify API payloads, debug webhook bodies, or compress config JSON before sharing it in chat or docs.

FAQ: This formatter validates JSON structure in the browser. It does not auto-repair malformed JSON, but it does surface the parse location and a short repair hint.

Quick guide

Use cases, answers, and nearby tools

Compact below-tool notes that help first-run users and repeated visitors move faster without changing the main interface.

Chinese search: JSON 格式化、JSON 美化、JSON 驗證、JSON 壓縮

How to use

Run a clean first pass

  1. Paste a JSON payload into the input panel.
  2. Format or minify it with one click, or use the example to see the expected flow.
  3. Read the diagnostics for line and column hints, then copy the clean output.

Examples

Real jobs this page helps with

  • Webhook debuggingPretty-print a webhook body so nested keys and malformed commas are easier to spot.
  • Compact config sharingMinify a valid JSON blob before pasting it into docs, tickets, or chat.

FAQ

What people usually want to know

Will it auto-fix broken JSON?
No. It validates the payload and points to the parse location, but it does not invent repaired structure.
Does formatting happen locally?
Yes. Formatting, minifying, and diagnostics stay in the browser.

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