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Prettify, inspect, compare, convert, validate, and extract JSON from real-world logs - all locally in a native desktop app.
all-in-one JSON workspace · professional developer experience · native-speed performance
JsonStudio is built for JSON in real development work: API requests and responses, deeply nested data, escaped strings, JSON5-like snippets, and log lines where plain text and JSON are mixed together.
- Local-first desktop app: no network required, no browser required, no ads, a polished UI, shortcut support, and no more jumping between a pile of web tabs.
- Smarter formatting: supports standard JSON, JSON-like/JSON5 input, escaped JSON strings, JSON with trailing commas, JSON with unquoted keys, automatic repair attempts for problematic JSON data, and paste auto-formatting.
- Log-like text and JSON mixed content formatting: keeps the original log unchanged, extracts JSON fragments automatically, and displays structured results separately for easier log data inspection.
- Better reading and review: tree view, JMESPath/JSONPath query, real-time statistics, and JSON diff make complex JSON data easier to understand.
- Details that fit daily use: preserves original object key order by default, keeps JSON editing operations undoable, and reuses existing tabs when reopening files.
- Developer tools: prettify, minify, escape, unescape, minify + escape, fold, unfold, JSON Schema generation/validation, JSON <-> YAML/XML/TOML/CSV conversion, and typed code generation.
- Smooth file workflow: multi-tabs, auto-numbered Untitled tabs, reused tabs for reopened files, unsaved-change prompts, optional auto-save, drag-and-drop JSON opening, and direct opening by double-clicking JSON files.
Built on Monaco Editor, JsonStudio provides a top-tier JSON prettify and viewing experience with syntax highlighting, code folding, find/replace, bracket coloring, light/dark mode, and 10+ themes.
JsonStudio handles standard JSON, JSON5-like input, escaped JSON strings, trailing commas, unquoted keys, and mixed log text with embedded JSON fragments. It keeps original text intact while extracting structured JSON results for review.
Use the tree view to navigate nested data, copy paths or values, and query with JMESPath or JSONPath when a payload is too large to scan manually.
Compare JSON side by side, convert between common data formats, generate typed models, or extract JSON back from supported code snippets.
Generate JSON Schema from data, validate JSON against a schema, and inspect detailed validation errors in a dedicated workspace.
| Capability | Online Tools | JsonStudio |
|---|---|---|
| Works fully offline with local files | Limited | Yes |
| Keeps sensitive JSON on your machine | Risky | 100% local |
| Handles JSON, JSON5-like input, escaped JSON, and repairable fragments | Partial | Built in |
| Extracts JSON from log-like mixed text | Rare | Yes |
| Tree view with JMESPath/JSONPath query | Partial | Yes |
| Multi-tab workflow with unsaved prompts and optional auto-save | No | Yes |
| Native shortcuts, format clipboard, always-on-top window | No | Yes |
| Diff, convert, schema validation, and code generation in one app | Fragmented | Unified |
Download the latest installer from GitHub Releases.
- Download the DMG for your Mac architecture (
aarch64for Apple Silicon,x64for Intel). - Open the DMG and drag
Json Studio.appinto Applications. - On first launch, if macOS blocks the app because it is from an unidentified developer, right-click
Json Studio.appand choose Open, or allow it in System Settings > Privacy & Security.
Current macOS builds are not Apple Developer ID notarized, so the first launch may require manual confirmation.
- Desktop: Tauri 2.0 + Svelte 5 + Monaco Editor
- Core: Rust + Javascript
If JsonStudio helps your daily JSON work, a star would mean a lot.