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Visionneuse JSON

Visualiser des données JSON sous forme d’arborescence. Fonctionne dans votre navigateur — gratuit, sans inscription ni installation, sans envoi de données.

Outils développeur

À propos de cet outil

Explore nested JSON as an expandable tree instead of a flat wall of text. Collapse branches you do not need and search within large documents to find keys or values quickly.

Ideal for API responses, config files, and log extracts when you want structure at a glance without leaving the browser.

Fonctionnalités

  • Vue arborescente avec nœuds extensibles et réductibles
  • Recherche pour accéder aux clés ou valeurs correspondantes
  • Séparation claire des objets, tableaux et primitives
  • S’exécute côté client pour les tailles de document habituelles

Comment utiliser the JSON viewer

  1. Coller ou charger du JSONPaste JSON text into the input area. Some viewers also accept drag-and-drop or file pickers when available.
  2. Naviguer dans l’arborescenceÉtendez les objets et tableaux pour explorer en profondeur ; réduisez les sections pour limiter le bruit.
  3. Rechercher et copierUse search for long payloads, then copy paths or values as needed for debugging or tickets.

Guides

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Questions fréquentes

What is the difference between viewer and formatter ?
The viewer emphasizes navigation and structure in a tree. A formatter focuses on pretty-printing text. Many workflows use both: format for readability, then tree view for exploration.
Can I view invalid JSON ?
Malformed JSON may not parse. Fix syntax errors or extract the valid fragment first, then paste again.
What does the JSON Viewer tool do?
View JSON data in a tree structure. Includes tree view, collapsible nodes, and search. Runs in your browser — free, no signup, no install, no data upload. It is listed under Developer Tools on FreeEasyToolsOnline.
Is my data sent to your servers?
Most processing for this tool runs in your browser. Do not paste secrets you cannot afford to expose, and read any on-page warnings for tools that intentionally call external APIs.
Do I need to install anything?
No. Use a modern desktop or mobile browser. For best results, keep the page open until processing finishes for large files or long operations.