← 모든 도구 / 개발

JSON 포매터

JSON을 온라인에서 무료 포맷팅. 구문 검증, 미니파이, 트리 뷰, 문법 강조, 상세 오류 리포트. 브라우저에서 작동하는 빠른 JSON 에디터.

JSON 포매터 is a free online 개발 tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.

개발자를 위한 코드 도구로, 구문 강조, 실시간 검증, 포맷팅 기능을 제공합니다. JSON, XML, YAML, SQL 등 주요 형식을 전면 지원합니다.

How to use

  1. 1 JSON 포매터 도구 페이지를 엽니다.
  2. 2 텍스트, URL 또는 데이터를 입력 영역에 붙여넣으세요.
  3. 3 작업 모드와 매개변수를 선택하세요.
  4. 4 도구를 실행하고 결과를 확인합니다.
  5. 5 결과를 복사하거나 다운로드하세요.

Why we built this tool

As developers ourselves, we kept switching between scattered tools that sent our code to unknown servers. We built this developer suite so formatting, validation, and conversion all run locally — your code stays yours.

About JSON 포매터: what you should know

Full-stack developers, QA engineers, and API integrators who stare at raw JSON payloads every day. When a mobile app returns a 20KB compressed object in a single line of text, or when a third-party API error dumps thousands of unindented characters into a ticket, the formatter is the fastest way to restore human-readable structure without opening an IDE.

Key features

  • Syntax Validation with Line-Precise Errors — Paste any JSON and get a clean tree within milliseconds. If a comma is missing or a quote is unterminated, the error message tells you exactly which character position broke the parse — not just that something is wrong.
  • Configurable Indentation & Sorting — Choose 2-space, 4-space, or tab indentation to match your team style. Keys can be sorted alphabetically, which is useful when diffing two API responses side by side or when preparing fixtures for unit tests.
  • Collapsible Node Tree — Large nested objects become navigable instead of overwhelming. Click any arrow to collapse a subtree while you trace a specific path through the document — especially helpful when hunting down a wrong value buried five levels deep.
  • No Data Sent to Any Server — Everything runs inside your browser. The JSON you paste never leaves your device, even if it contains access tokens, personal records, or internal API responses that should never touch a third-party service.

Common use cases

  • Debugging API Error Responses — When an endpoint returns a cryptic 422 or 500, paste the response body into the formatter to see which field the server rejected. The clean structure makes missing values and type mismatches obvious in seconds.
  • Reviewing Webhook Payloads — Services like Stripe, GitHub, and Shopify send dense webhook JSON. Format it before logging it to a ticket or sharing it with your team so everyone sees the same readable structure.

자주 묻는 질문

이 도구는 무료인가요?

네, 가입 없이 완전 무료입니다.

모바일에서 사용할 수 있나요?

네, 모바일 브라우저에서 터치를 지원합니다.

어떤 카테고리에 속하나요?

개발

어떤 프로그래밍 언어 형식을 지원하나요?

JSON, XML, YAML, SQL, CSV, TOML 등을 지원하며, Java, Python, TypeScript 등의 코드 형식 변환도 지원합니다.

What code and data formats are supported for formatting and validation?

ToolPure supports JSON, XML, YAML, TOML, CSV, SQL, and Markdown formatting. Validation includes syntax checking, schema validation for JSON, and well-formedness checking for XML.

Can I convert between different data formats?

Yes, you can convert between JSON, XML, YAML, CSV, and TOML. The converter preserves data types, nested structures, and array indices during conversion.

Is there a file size limit for code formatting?

Files up to 10MB can be formatted without issues. For larger files, the tools use Web Workers to prevent UI freezing. Syntax highlighting supports files with up to 100,000 lines.

Is JSON 포매터 safe? Is my data uploaded or stored?

Yes. JSON 포매터 is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.

🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.

🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.

관련 도구

XML 포매터 Format and beautify XML documents with proper indentation. Free online XML formatter for readable code and debugging. JSON 뷰어 View and explore JSON data with collapsible tree visualization. SQL 포매터 Format and beautify SQL queries with proper indentation and highlighting. Free online SQL formatter for readable database code. JSON 에디터 Edit JSON data visually with tree view, inline editing, and validation. XML → JSON Convert XML data to JSON format with attribute handling. HTML 포매터 Format and beautify HTML with proper indentation. Free online tool to clean up messy markup in your browser instantly. CSS 포매터 Format CSS with proper indentation and line breaks. JSON 트리 시각화기 Visualize nested JSON structures as an interactive, collapsible tree. Expand and collapse nodes to explore complex data hierarchies in your browser.

📖 How-To Guides

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