Turn a one-line response into something you can inspect
Useful when you need to confirm fields, nested objects, arrays, and unexpected values quickly.
Readable structure is usually the fastest way to spot field-level mistakes in API data.
Paste JSON to beautify, minify, validate, escape, or unescape it instantly. Everything runs locally in your browser.
Commencer à formater du JSON
Saisissez du JSON à gauche ou utilisez Importer pour charger depuis un fichier.
A reliable formatter workflow is simple: paste the raw payload, choose whether you need readable or compact output, review parse errors if any, then copy, download, or continue into repair, table editing, or schema generation.
From one-line payload to readable structure
A lot of real payloads come from logs, APIs, and queues as a single unreadable line. The formatter turns that into something you can inspect in seconds.
Use pretty output for review and debugging. Switch to minified output only when you need compact transport or storage.
These are the common cases where formatting pays off immediately during real development work.
Useful when you need to confirm fields, nested objects, arrays, and unexpected values quickly.
Readable structure is usually the fastest way to spot field-level mistakes in API data.
Stable key order makes diffs cleaner and reduces noise when reviewing configuration changes.
Sorting is useful when your real goal is comparison rather than human-friendly business ordering.
Logs and message systems often store JSON inside strings. Unescape it first, then keep working on the actual structure.
If the payload is full of backslashes, unescaping is usually the first useful step.
Tutorial Step
Étape 1 – Collez ou importez votre JSON dans le formateur en ligne
Start with the original payload. You do not need to clean up spacing or line breaks first.
Tutorial Step
Étape 2 – Choisissez les options de formatage
Readable JSON and compact JSON solve different problems. Pick the mode that matches what you need next.
Tutorial Step
Étape 3 – Vérifiez le résultat et les éventuelles erreurs
The output area is both a result view and a fast feedback loop. Valid JSON renders immediately; invalid JSON shows an actionable error.
Tutorial Step
Étape 4 – Copiez ou téléchargez pour votre API, vos réponses ou vos logs
Once the JSON is clean, use it as the working copy for the next step instead of repeating the cleanup elsewhere.
A common formatter workflow
Paste the raw payload into the formatter and expand it into readable JSON first.
If the parser fails, jump to the error or move the payload into Repair.
Once the structure is valid, choose beautified, minified, escaped, or unescaped output based on the next task.
Apply the output back to input if the cleaned result should become your new working copy.
Continue into the table editor, compare tool, or schema generator when formatting is no longer the bottleneck.
Putting the formatter at the front of the workflow usually saves time later because every downstream tool receives cleaner JSON.
Conseils rapides pour débuter
Vérifiez la syntaxe JSON et localisez rapidement les erreurs avant de formater ou d’envoyer des données à des API.
Corrigez automatiquement les problèmes JSON courants (guillemets manquants, virgules finales, crochets/accolades déséquilibrés).
Convert clean JSON into a spreadsheet with nested-field flattening and live preview.
Compare two JSON payloads side by side and highlight additions, deletions, and edits.
Éditez les données JSON visuellement dans une interface de type tableur avec mises à jour en temps réel.
Générez des définitions JSON Schema à partir de votre JSON pour la validation et la documentation.
Le formatage JSON rend vos données plus lisibles en ajoutant une indentation, des retours à la ligne et un espacement appropriés.
Oui. Vous pouvez choisir 2 espaces, 4 espaces ou une sortie compacte (minifiée).
Non. Le formatage ne change que la présentation ; la structure et les valeurs restent identiques.
Oui. Le formateur gère bien les JSON volumineux, mais les très gros fichiers peuvent prendre quelques instants à traiter.
Formatting focuses on readability, while validation focuses on syntax correctness. This page does both in one flow.
No. Formatting, validation, escaping, and unescaping all run locally in your browser.