JSON Pilot vs NativeX

A native JSON viewer and editor for iPhone and iPad, with an on-device AI assistant that explains your data without sending a byte to the cloud. JSON Pilot opens any JSON — from Files, the share sheet, AirDrop, your clipboard, or an HTTP request you fire from inside the app — and gives you three ways to read it: a syntax-highlighted Tree, a tap-to-edit Fields drilldown, and a Text view with line numbers. Edit at any level, prettify or minify, validate with a precise line:col error, and save the edits back to the original file. Multi-megabyte files open, search and edit smoothly. — FREE FOREVER — The whole viewer and editor is free with no account, no nags, no cloud sync. View, edit, validate, format, minify, search, Save, Save to Files, Share, Copy. We never gate the basics. — ON-DEVICE AI ASSISTANT — Ask "What is this JSON?", "Find issues" or "Extract all emails" and JSON Pilot answers locally, in your language, using Apple Foundation Models. Your JSON, your prompts and the model's replies never leave your device. No server, no API key, no cloud fallback. (The AI assistant requires Apple Intelligence: iPhone 15 Pro or later, or an iPad with M1 or A17 Pro or later, in a language Apple Intelligence supports. On other devices the assistant is turned off automatically; everything else in the app still works.) — POWER TOOLS (PRO) — • JSON Diff — compare two payloads by structure. Reformatting is never a change, and array items are lined up. Summary view groups Changed / Added / Removed; Unified view shows a GitHub-style line diff. • JSONPath queries — $, ., [i], [*], .. and more. Matches highlight right on the Tree. • Format conversion — export to YAML, CSV or XML. • HTTP request tool — send GET / POST / PUT / PATCH / DELETE with custom headers and a JSON body, then open the response in the same workspace. • Auto-fix — repair broken JSON: trailing commas, single quotes, unquoted keys, comments, smart quotes. • Themes — accent color and three syntax palettes. — PRIVACY YOU CAN VERIFY — Zero analytics SDKs. Zero telemetry. Zero crash reporters. The only network traffic the app initiates is StoreKit (your purchases) and HTTP requests you send yourself — and their responses are never cached on disk. Recents are stored locally, CloudKit is explicitly disabled, and Clear Recents erases your history together with every local copy of your documents. JSON Pilot does not request Camera, Photos, Contacts, Microphone, Location or any other iOS permission. — UPGRADE TO PRO — Two ways to unlock the same Pro features: • Monthly subscription — billed monthly, cancel anytime. • Lifetime — one-time purchase, keep Pro forever. Both options unlock the same features. See the App Store listing for current pricing in your region. Manage or cancel anytime in Settings → Apple Account → Subscriptions. — REQUIREMENTS — iPhone or iPad with iOS or iPadOS 26.4 or later. AI features require Apple Intelligence. Available in English, Deutsch, Español, Français, Italiano, Português (Brasil), Русский, 日本語, 한국어 and 简体中文. — SUPPORT — Questions, bugs, ideas? Use the App Support link on this page — we read everything. — TERMS — Terms of Use: https://shilovskii.dev/apps/json-pilot/terms.html Privacy Policy: https://shilovskii.dev/apps/json-pilot/privacy.html

NativeX is a visual playground for Apple's on-device intelligence — build prompt pipelines as a graph of cards, wire them together with variables, and run them right on your iPhone. Built for iOS engineers, prompt engineers, and the AI-curious: if you want to know what Apple's on-device model can actually do, this is the fastest way to find out. FREE AND PRIVATE Every run executes on the Apple foundation model that ships with your device. No account, no API key, no server: prompts, photos, and recordings never leave your iPhone, and inference costs nothing. LEARN THE REAL API Every card mirrors one Apple framework call and names the exact Swift symbol — LanguageModelSession, NLTokenizer, RecognizeTextRequest, SpeechTranscriber, etc. Configure it in the inspector, run it, read the output. What you learn transfers line-for-line to Xcode. BUILD PROMPT PIPELINES • Prompt groups assemble instructions, few-shot examples, history, and the curreturn into a single transcript • Guided generation: constrain output to JSON with registered schemas, or design your own schema on the fly — no rebuild • 17 native ops: tokenize, detect language, named entities, sentiment, OCR a photo, read a barcode, transcribe speech, speak text aloud, regex, JSON extraction, and more. Wait for more! • Human-in-the-loop pauses: type or dictate an answer mid-run EVALUATE LIKE A PRO — LLM OPS, ON-DEVICE NativeX brings the modern LLM-ops workflow — observability, datasets, evaluations — to the model in your pocket: • Run History logs every execution as a step-level trace — assembled prompt, output, timing, token estimates • Datasets batch-run a graph over a table of records, sequential or parallel • LLM-as-judge scoring runs on-device too • Re-run, reproduce, and compare past runs REQUIREMENTS NativeX runs the Apple Intelligence on-device model. That requires an iPhone 15 Pro or newer (A17 Pro chip or later) on iOS 26 or later, with Apple Intelligence enabled in Settings.