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.
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Entrada JSON
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Resultados da validação
Comece a validar JSON
Insira JSON para ver os resultados da validação
Como validar JSON online – guia passo a passo
1Etapa 1 – Cole ou importe JSON no validador2Etapa 2 – Revise os resultados da validação3Etapa 3 – Corrija os erros e valide novamente4Etapa 4 – Exporte um relatório de validação
Use este validador de JSON online para verificar sintaxe, estrutura e integridade dos dados, com erros, avisos e estatísticas em tempo real.
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.
JSON inválido (vírgula ausente)
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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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}
Resultados da validação
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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.
JSON inválido (vírgula ausente)
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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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}
Resultados da validação
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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.
JSON inválido (vírgula ausente)
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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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}
Resultados da validação
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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
Etapa 1 – Cole ou importe JSON no validador
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.
Cole o JSON no editor à esquerda ou use Importar para carregar de um arquivo, URL ou área de transferência.
A validação roda automaticamente conforme você digita, como um linter de JSON ao vivo.
Use respostas reais de API, arquivos de configuração ou trechos de log para encontrar problemas cedo.
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
Etapa 2 – Revise os resultados da validação
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.
Confira a lista de erros para problemas de parse, como vírgulas ausentes, colchetes não fechados ou escapes inválidos.
Revise os avisos para aninhamento profundo, strings muito grandes ou padrões suspeitos.
Use Estatísticas para ver contagem de objetos/arrays, profundidade máxima e tamanho geral.
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
Etapa 3 – Corrija os erros e valide novamente
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.
Clique em um erro ou aviso para ir direto à linha e coluna exatas.
Se o JSON estiver muito quebrado, abra a ferramenta Reparar JSON para corrigir automaticamente problemas comuns de sintaxe.
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
Etapa 4 – Exporte um relatório de validação
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.
Clique em Relatório para baixar um relatório JSON com todos os erros, avisos e estatísticas.
Compartilhe o relatório com sua equipe para depuração, code review ou verificação de contrato de API.
O relatório inclui números de linha, mensagens e recomendações de alto nível.
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.
Dicas rápidas para iniciantes
A maioria dos JSON inválidos vem de vírgulas faltando, vírgulas finais ou uso de aspas simples em vez de aspas duplas.
Se aparecer um erro de parse de JSON, comece pela linha e coluna indicadas na mensagem.
Valide JSON antes de enviar para APIs ou salvar no banco de dados para evitar erros em runtime e payloads quebrados.
Before sending JSON to Repair, Compare, or Schema tools, a validation pass usually gives you a cleaner start.
Ferramentas relacionadas de validação e formatação de JSON
Combine estas ferramentas com a validação para melhorar a qualidade dos dados e agilizar workflows em JSON.
A validação de JSON verifica se o JSON está sintaticamente correto e coerente, além de mostrar estatísticas como contagem de tipos, profundidade de aninhamento e tamanho do payload.
Que tipos de erros eu verei?
Erros comuns incluem vírgulas ausentes, chaves/colchetes não fechados, sequências de escape inválidas, vírgulas finais (trailing commas) e strings malformadas.
Sobre o que são os avisos?
Os avisos destacam riscos potenciais, como aninhamento muito profundo, strings extremamente longas ou padrões incomuns — mesmo com JSON válido, isso pode causar problemas mais adiante.
Posso baixar um relatório de validação?
Sim. Use Relatório para baixar um relatório de validação em JSON com erros, avisos e estatísticas.
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.
