JSON 포맷터 — 무료 온라인 도구
지저분한 JSON을 깔끔하고 읽기 쉬운 구조로 포맷하고 들여씁니다.
- 브라우저에서 실행
- 즉시 결과 확인
- 100% 비공개
What Is a JSON Formatter?
A JSON formatter takes minified or inconsistently indented JSON and rewrites it with clean, consistent indentation, making nested objects and arrays easy to read and debug at a glance.
This is especially useful when working with API responses, which are almost always returned minified to save bandwidth — pasting one into a formatter instantly reveals its structure without needing to trace matching brackets by eye.
누가 이 도구를 사용하나요?
비즈니스용
Inspect a minified API response to understand its structure.
개인 사용
Read a configuration file that was saved without formatting.
학생용
Learn JSON structure for a web development or API course.
사무실용
Format a data export for easier manual review.
주요 기능
Custom Indent Size
Choose an indent size from 1 to 8 spaces.
Instant Formatting
Output updates immediately as you paste in JSON.
Clear Error Messages
Invalid JSON shows exactly what went wrong.
100% Private
Your data is never uploaded — formatting happens entirely in your browser.
이점
Instantly Readable
Turn a wall of minified JSON into a clearly indented structure.
Faster Debugging
Spot missing brackets or misplaced values much more easily once formatted.
Nothing Uploaded
Safe for sensitive API payloads, since nothing leaves your browser.
JSON 포맷터 사용 방법
Paste Your JSON
Add minified or messy JSON into the input box.
Choose an Indent Size
Pick how many spaces to indent each level.
Copy the Formatted Result
Use the Copy or Download button to grab the result.
기술 세부 정보
| 항목 | 값 |
|---|---|
| 입력 | Valid JSON text |
| 처리 | No practical limit — handled entirely by your browser |
| 출력 | Exact, lossless re-formatting using the native JSON parser |
개인정보 보호 및 보안
이 도구를 사용할 때 파일에 실제로 어떤 일이 일어나는지 알아보세요.
100% Client-Side
This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.
No Upload, Ever
There is no file upload and no server processing step — your data never leaves your device.
Works Offline
Once this page has loaded, the tool keeps working even without an internet connection.
Nothing Stored
Nothing you enter is saved on our servers — refreshing the page clears everything.
No Tracking of Your Input
We have no way to see what you type, generate or convert with this tool.
팁
Use 2 Spaces for Web Projects
2-space indentation is the most common convention for JSON in web projects.
Check the Validator First on Large Payloads
If formatting fails, use the JSON Validator to pinpoint the exact error.