For iPhone & iPad · iOS 17+

The JSON workbench
that lives on your device.

View, edit, format, validate, convert, and compare JSON in one focused app. No cloud, no accounts, no data leaves your phone or tablet.

Download on App Store See it in action

100% Local processing

9 Export formats

7 Languages codegen

0 No ads, ever

Everything you need

A Swiss Army knife for JSON workflows

Everyday JSON tasks, beautifully arranged. From quick formatting to schema-driven validation and model code generation.

View & Edit

Syntax highlighting, line numbers, undo/redo, search, and a JSON keyboard accessory with fast bracket insertion.
Pretty & Minify

Format or compress JSON with configurable indentation (2 / 4 / tab) and optional canonical sorted-key output.
Tree & Table

Drill down nested structures with collapsible tree view, or flatten any payload into a filterable tabular view.
JSONPath Query

Run rich JSONPath queries with wildcards, recursive descent, slices, unions, and expressive filters.
Schema & Validate

Generate JSON Schema from any sample document, save multiple schemas, and validate live with structured diagnostics.
Side-by-Side Diff

Compare two JSON documents with normalized line-based LCS diff, synced side-by-side scrolling, and change counts.
Export to 9 Formats

Convert JSON to CSV, TSV, XML, YAML, TOML, TOON, Markdown Table, HTML, or Base64 with nested dot-path flattening.
7 Languages Codegen

Generate type-safe model stubs for Swift, Kotlin, TypeScript, Dart, Java, Python, and C# — with configurable options.
Privacy First

JSON content, history, schemas, and settings all stay on-device. Only minimal anonymous usage analytics is collected.

Built for real work

From paste to production payload

A focused workbench that helps you understand, shape, and ship JSON data on the go.

Edit · Parse · Format

An editor that understands JSON.

Drop in messy JSON from clipboard, files, or any URL you type. The workbench parses it live, shows inline diagnostics, and keeps a smooth editing experience even with large payloads.

Syntax highlighting and line numbers with scroll-aware search
JSON keyboard accessory for brackets, quotes, colons — without switching keyboards
Off-main-actor processing for payloads over 1 MB with live progress

Explore · Query · Inspect

See every level. Ask any question.

Hierarchical tree or flat table? Either way, find the field you need in seconds. JSONPath supports wildcards, recursive scans, filters and slices so you can extract exactly what you need.

Collapsible tree with counts for arrays and objects
Tabular view with dot-notation paths for nested data
Full JSONPath with filters like \$.store.book[?(@.price<10)]

Convert · Codegen · Diff

Turn JSON into anything.

One tap exports your document to CSV, XML, YAML, TOML and more. Generate typed model stubs for 7 languages — or diff two payloads with synced side-by-side scrolling.

9 export formats including dot-path flattened tabular outputs
Swift / Kotlin / TypeScript / Dart / Java / Python / C# code generation
Side-by-side JSON diff with inserted / deleted / changed line counts

Private · Fast · On-Device

Your JSON never leaves the device.

All processing, history, schemas, and settings are stored locally. URL loads fetch only what you enter — downloaded content is never uploaded anywhere.

0 JSON content uploaded. Period.
Optional in-app purchase to unlock unlimited Tree / Convert / Diff use
Firebase Analytics collects only anonymous usage events — no ad IDs

App Gallery

Built for iPhone and iPad

Adaptive layouts that make the most of every screen size — from iPhone SE to 13-inch iPad Pro.

Pricing

Free for daily work. Optional unlock for more.

No subscription, no ads, no nag screens. Use the essentials free every day.

Always Free

₀ / forever
- Editing with syntax highlight + search
- Pretty / minify / line-numbers
- Table view, import / export / share
- JSONPath queries unlimited
Daily Free Quota

reset every day
- Tree view · 5/day
- Converts & code/schema · 5/day
- File diff compare · 3/day
- Generous enough for most daily tasks
One-Time Unlock

non-consumable · pay once
- Unlimited Tree, Convert, Schema, Codegen
- Unlimited side-by-side Diff
- Optional supporter tiers grant the same unlock
- Restores across your devices with the same Apple ID

The JSON workbench that lives on your device.

A Swiss Army knife for JSON workflows

View & Edit

Pretty & Minify

Tree & Table

JSONPath Query

Schema & Validate

Side-by-Side Diff

Export to 9 Formats

7 Languages Codegen

Privacy First

From paste to production payload

An editor that understands JSON.

See every level. Ask any question.

Turn JSON into anything.

Your JSON never leaves the device.

Built for iPhone and iPad

Free for daily work. Optional unlock for more.

Always Free

Daily Free Quota

One-Time Unlock

Pick up JSON DevKit today.

The JSON workbench
that lives on your device.