JSON Viewer
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About this app
JSON Viewer is a clean, offline developer tool that turns raw JSON into a collapsible tree you can actually read. Paste a payload, format it, validate it, and walk through it node by node — no login, no upload, no clutter.
Whether you are debugging an API response, inspecting a config file, or cleaning up a messy log dump, JSON Viewer gives you the parser, formatter, and tree explorer in one focused screen.
KEY FEATURES
• Tree view with collapse and expand at every level
• Syntax highlighting (keys blue, strings green, numbers orange, null and booleans red)
• Prettify with 2 or 4 space indent
• Minify to a single compact line
• Validate JSON with clear, line-aware error messages
• Paste from clipboard and copy results with one tap
• Adjustable font size from 10 to 24 pt
• Dark mode plus automatic system theme follow
• 20 languages with full RTL support for Arabic
• 100% offline, no account, no tracking, no analytics
WHO IT IS FOR
• Backend, frontend and full-stack developers
• Mobile engineers working with Android, iOS, Flutter, or React Native
• API integrators debugging REST and GraphQL responses
• Data analysts cleaning JSON exports and datasets
• DevOps and SRE engineers reading configs and structured logs
WHY THIS ONE
Privacy first. Every byte of JSON you paste stays on your device. Nothing is uploaded to a server, nothing is shared, nothing is logged.
No bloat. This is not a 50 MB IDE pretending to be a viewer. It launches fast, does JSON well, and stays out of your way.
Truly multilingual. The interface ships in 20 hand-localized languages, not machine-translated fragments, so the tool feels native wherever you work.
Supported by a single small banner ad to keep development sustainable. No paywall, no subscription, no upsell popups.
TYPICAL USE CASES
• Inspecting Stripe and PayPal webhook payloads
• Reading Firebase Remote Config and Firestore exports
• Debugging GraphQL and REST API responses
• Formatting messy server log JSON into something readable
• Reading package.json, tsconfig.json, and other project configs
Works with JSON from APIs, config files, package.json, tsconfig, Firebase, Stripe, GitHub, and any REST or GraphQL endpoint.
Install JSON Viewer and keep a proper JSON formatter, validator and tree explorer in your pocket.
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Whether you are debugging an API response, inspecting a config file, or cleaning up a messy log dump, JSON Viewer gives you the parser, formatter, and tree explorer in one focused screen.
KEY FEATURES
• Tree view with collapse and expand at every level
• Syntax highlighting (keys blue, strings green, numbers orange, null and booleans red)
• Prettify with 2 or 4 space indent
• Minify to a single compact line
• Validate JSON with clear, line-aware error messages
• Paste from clipboard and copy results with one tap
• Adjustable font size from 10 to 24 pt
• Dark mode plus automatic system theme follow
• 20 languages with full RTL support for Arabic
• 100% offline, no account, no tracking, no analytics
WHO IT IS FOR
• Backend, frontend and full-stack developers
• Mobile engineers working with Android, iOS, Flutter, or React Native
• API integrators debugging REST and GraphQL responses
• Data analysts cleaning JSON exports and datasets
• DevOps and SRE engineers reading configs and structured logs
WHY THIS ONE
Privacy first. Every byte of JSON you paste stays on your device. Nothing is uploaded to a server, nothing is shared, nothing is logged.
No bloat. This is not a 50 MB IDE pretending to be a viewer. It launches fast, does JSON well, and stays out of your way.
Truly multilingual. The interface ships in 20 hand-localized languages, not machine-translated fragments, so the tool feels native wherever you work.
Supported by a single small banner ad to keep development sustainable. No paywall, no subscription, no upsell popups.
TYPICAL USE CASES
• Inspecting Stripe and PayPal webhook payloads
• Reading Firebase Remote Config and Firestore exports
• Debugging GraphQL and REST API responses
• Formatting messy server log JSON into something readable
• Reading package.json, tsconfig.json, and other project configs
Works with JSON from APIs, config files, package.json, tsconfig, Firebase, Stripe, GitHub, and any REST or GraphQL endpoint.
Install JSON Viewer and keep a proper JSON formatter, validator and tree explorer in your pocket.
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Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
No data collected
Learn more about how developers declare collection
Data isn’t encrypted
