Check JSON syntax, structure, and potential risks in real time. Includes error navigation, warnings, statistics, and exportable validation reports, all processed locally with no login required.
Ctrl/Cmd+D 을 눌러 이 도구를 북마크하세요
JSON 입력
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검증 결과
JSON 검증 시작
검증 결과를 보려면 JSON을 입력하세요
온라인에서 JSON을 검증하는 방법 – 단계별 가이드
11단계 – JSON을 붙여넣거나 가져오기22단계 – 검증 결과 확인33단계 – 오류 수정 후 다시 검증44단계 – 검증 보고서 내보내기
이 온라인 JSON 검증 도구로 JSON 문법, 구조, 데이터 무결성을 실시간으로 확인하고 오류, 경고, 통계를 확인하세요.
Find the problem before guessing at the fix
The validator does more than say invalid - it shows what broke and where
A lot of JSON does not just look messy; it is actually unparseable. The validator is useful because it tells you where the JSON breaks, what kind of issue it is, and whether there are broader structural risks that matter downstream.
JSON to validate
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{
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"orderId":"SO-1024"
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"items":[
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{
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"sku":"A-1",
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"qty":2,
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}
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]
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}
Validation feedback
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Error 1
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Line 3, Column 3: Expected "," or "}"
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.
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Error 2
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Line 7, Column 5: Trailing comma is not allowed
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.
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Statistics
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Objects:2
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Arrays:1
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Max Depth:3
When there are multiple errors in the same payload, scan the full list first, then decide whether to fix it manually or send it to Repair JSON.
3 validator examples that match real work
These examples cover the most common validation scenarios in development, testing, and operations: API responses, configuration files, and log payloads.
API Debugging
Catch a missing comma in an API response immediately
Useful during API debugging, webhook testing, and response inspection when you need to know whether the backend returned malformed JSON or the payload was copied incorrectly.
유효하지 않은 JSON(콤마 누락)
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{
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"user":{
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"id":42,
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"name":"Maeve"
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}
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"roles":["admin","editor"]
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}
검증 결과
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Error
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Line 6, Column 3: Expected "," or "}"
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.
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Suggestion
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Add a comma after the "user" object
This is exactly the kind of issue the validator handles best: mostly-correct JSON with one local syntax break.
Configuration
Spot trailing commas and comments before a deploy fails
A common problem is treating JavaScript object syntax as if it were valid JSON. The validator helps separate what JS allows from what strict JSON actually accepts.
유효하지 않은 JSON(콤마 누락)
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{
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"env":"prod",
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"retry":3, // retry count
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"features":{
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"betaCheckout":false,
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}
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}
검증 결과
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Error
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Line 3, Column 15: Comments are not allowed in JSON
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Line 6, Column 3: Trailing comma is not allowed
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.
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Result
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Remove the comment and trailing comma
Running config through the validator before release is usually faster than debugging config failures in production.
Log Review
Use warnings and stats to catch structural risk even when JSON is valid
Some payloads parse successfully but are still risky because of depth, field shape, or payload size. Warnings and statistics help expose that early.
유효하지 않은 JSON(콤마 누락)
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{
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"event":"audit",
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"payload":{
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"meta":{
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"trace":{
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"deep":{
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"nested":{
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"value":"..."
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}
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}
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}
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}
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}
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}
검증 결과
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Validation Result
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OK - JSON is valid
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.
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Warning
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Payload depth is high and may be harder to transform or inspect downstream
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.
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Statistics
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Objects:6
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Max Depth:6
Even when JSON is valid, warnings and stats can tell you that downstream processing will be more expensive.
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Tutorial Step
1단계 – JSON을 붙여넣거나 가져오기
Start by putting the raw JSON into the input editor. You do not need to clean it up first. One of the main benefits of the validator is catching syntax problems early instead of discovering them only after you send the data to an API or save it as configuration.
왼쪽 편집기에 JSON을 붙여넣거나, ‘가져오기’로 파일/URL/클립보드에서 로드하세요.
입력하는 즉시 자동으로 검증이 실행되어 라이브 JSON 린터처럼 동작합니다.
실제 API 응답, 설정 파일, 로그 스니펫을 사용해 문제를 조기에 발견하세요.
Single-line JSON is fine. Monaco diagnostics and structural statistics still work without pre-formatting the input.
Validation updates as you type, so the page also works well as a lightweight live JSON linter.
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Tutorial Step
2단계 – 검증 결과 확인
Most people only look at the first error message, but the faster approach is to read the errors panel, warnings panel, and statistics together. Errors tell you what is already broken, warnings tell you what may break later, and statistics tell you how complex the payload really is.
‘오류’ 목록에서 콤마 누락, 괄호 미닫힘, 잘못된 이스케이프 등 파싱 문제를 확인하세요.
‘경고’에서 깊은 중첩, 매우 큰 문자열, 의심스러운 패턴을 확인하세요.
‘통계’에서 객체/배열 수, 최대 깊이, 전체 크기를 확인할 수 있습니다.
When a JSON file has multiple issues, do not stop after the first one. Scan the full list first so you can tell whether the problems are isolated or systemic.
If you need to hand the problem off to someone else, the report plus the diagnostics is much more useful than a screenshot alone.
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Tutorial Step
3단계 – 오류 수정 후 다시 검증
The goal here is not to delete characters blindly. Use the location and context around each error to understand why the JSON broke. Most invalid JSON falls into a small set of patterns: missing commas, single quotes, comments, trailing commas, unmatched brackets, or nested JSON strings that need another pass.
오류나 경고를 클릭하면 정확한 줄/열로 이동합니다.
일반적인 수정: 누락된 콤마 추가, 괄호 닫기, 특수 문자 이스케이프, 끝의 콤마 제거.
JSON이 많이 깨져 있다면 ‘JSON Repair’ 도구를 열어 일반적인 문법 문제를 자동으로 수정하세요.
When the file is heavily damaged or the error list is long, move to Repair JSON and let it fix common syntax issues before coming back for validation.
After the payload passes validation, scan the warnings and statistics again so you do not miss structural risks that survived syntax repair.
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Tutorial Step
4단계 – 검증 보고서 내보내기
Once the JSON is valid, it is ready for the rest of your workflow. Export a validation report if you need traceability, then move to the formatter, compare tool, schema generator, or table editor based on what you need next.
‘보고서’를 클릭해 모든 오류, 경고, 통계가 포함된 JSON 보고서를 다운로드하세요.
디버깅, 코드 리뷰, API 계약 검토를 위해 팀과 보고서를 공유하세요.
보고서에는 줄 번호, 메시지, 상위 수준의 권장 사항이 포함됩니다.
If you want to generate a schema, types, or review data in a table, validated JSON is a much more stable starting point.
Putting the validator at the beginning of the workflow usually saves rework later when debugging APIs, editing configs, or generating code.
A more reliable validator workflow
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Paste the rawest version of the JSON into the validator instead of pre-editing it first.
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Read the errors, warnings, and statistics together so you understand both syntax failures and structural risk.
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Fix small issues in place, but switch to Repair JSON when the payload is heavily damaged or the error list is long.
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Once the payload is valid, move it to the formatter, compare tool, or schema generator for the next stage of work.
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If you need to collaborate, export the report instead of sending screenshots so others can reproduce the problem faster.
Placing the validator at the start of your JSON workflow usually surfaces most downstream problems early, especially during API debugging, config review, and log analysis.
초보자를 위한 빠른 팁
대부분의 JSON 오류는 콤마 누락, 끝의 콤마, 또는 큰따옴표 대신 작은따옴표 사용에서 발생합니다.
JSON 파싱 오류가 보이면 메시지에 표시된 줄/열부터 확인해 수정하세요.
API로 보내거나 DB에 저장하기 전에 JSON을 검증하면 런타임 오류와 깨진 payload를 예방할 수 있습니다.
Before sending JSON to Repair, Compare, or Schema tools, a validation pass usually gives you a cleaner start.
관련 JSON 검증/포맷 도구
검증과 함께 이 도구들을 사용하면 데이터 품질을 높이고 JSON 워크플로를 단순화할 수 있습니다.
JSON 검증은 JSON의 문법이 올바른지와 구조가 일관적인지를 확인하고, 타입 개수, 중첩 깊이, payload 크기 같은 통계도 제공합니다.
어떤 오류를 볼 수 있나요?
자주 발생하는 오류는 콤마 누락, 중괄호/대괄호 미닫힘, 잘못된 이스케이프 시퀀스, 끝의 콤마(trailing comma), 문자열 형식 오류 등이 있습니다.
경고는 무엇을 의미하나요?
경고는 중첩이 너무 깊거나, 문자열이 지나치게 길거나, 비정상적인 패턴처럼 JSON이 유효하더라도 이후 처리에서 문제가 될 수 있는 위험을 알려줍니다.
검증 보고서를 다운로드할 수 있나요?
네. ‘보고서’에서 오류, 경고, 통계를 포함한 JSON 검증 보고서를 다운로드할 수 있습니다.
What is the difference between JSON validation and JSON repair?
Validation is for finding and explaining what is wrong, with precise locations and diagnostics. Repair is for automatically fixing common syntax problems. Use the validator when you want clarity; use repair when the JSON is too broken to fix efficiently by hand.
Can it handle large JSON files?
Yes. Typical API responses, config files, log snapshots, and medium-to-large JSON payloads work well. Larger payloads may take longer to analyze, but everything still runs locally in the browser.
Is my JSON uploaded anywhere?
No. Validation, diagnostics, and report generation all happen locally in your browser, which makes this page suitable for internal data, config values, and sensitive log payloads.
