Available on the App Store
D Inspector app icon

Local API Debugger for iPhone, iPad & Mac

A developer tool for inspecting and analyzing HTTP/HTTPS network traffic — 100% on-device. Log, modify, and replay API requests from any app on your iPhone, iPad, or Mac. All data stays on your device.

Download on App Store Explore Features

Features

Everything a developer needs

Built for iOS, iPadOS and macOS developers — inspect, log, and replay API traffic from any app. 100% local. No cloud. No data collection.

HTTPS Inspection

On-device certificate management. View and analyze encrypted HTTPS traffic from any app. SSL Proxying List to select which domains to analyze.

System-Wide Traffic Capture

Routes all device traffic through a local on-device proxy. Capture HTTP/HTTPS from every installed app — system-wide, no configuration needed.

Rich Request Viewer

Full detail view with headers, body, status, timing. JSON Tree view, image preview, HTML preview, hex dump, and syntax highlighting.

Search & Filter

Real-time search across URL, headers, and body content. Filter by method, status code range, content type, or domain. Pin important requests.

Breakpoints

Pause and edit requests before they reach the server, or responses before they return to the app. Rule-based triggers with pattern matching.

Map Local / Mock

Return custom JSON/text/image responses from local files instead of hitting real servers. Override status codes and headers per rule.

Map Remote

Redirect requests to different hosts or URLs — perfect for pointing to staging, canary, or local servers without changing app code.

Blocklist & Exclusions

Block requests by domain or URL pattern with wildcard support. Exclusion List to skip analysis for specific apps or system services.

Compose & Repeat

Build custom HTTP requests from scratch like a mini Postman. Re-send any captured request with one tap, or edit and replay it.

Scripting

Write custom scripts to automate request/response modification. Inject headers, transform body content, and implement custom logic per matched rule.

Export & Share

Export traffic as HAR files, individual requests as cURL commands, or share via AirDrop. Save full sessions for offline review.

Auth Utilities

Built-in JWT decoder, Base64 encoder/decoder, URL decoder, form-data parser, and multipart viewer — inline in the detail panel.

Live Activity & Widgets

Monitor proxy status and network traffic in real-time right from your Lock Screen or Dynamic Island without opening the app.

Lookup & Grouping

Easily search, look up, and group related API requests together for a cleaner view and more organized debugging sessions.

Biometric Privacy Lock

Secure your intercepted traffic data with FaceID/TouchID authentication and configure auto-clear history to protect sensitive API logs.

How D Inspector Works

A fully on-device pipeline for developers — no external server, no cloud, no data collection.

1

Enable VPN

With a single tap, D Inspector activates a local VPN on your device. All network traffic is routed through the app — no external server involved.

2

Inspect HTTPS Traffic

Install the on-device certificate once. D Inspector decrypts HTTPS traffic for domains you choose, letting you see encrypted requests in plain text.

3

Debug in Real Time

Captured requests appear instantly in the dashboard. Filter, inspect headers and body, replay requests, mock responses — all on your device.

More Views

See it in action

D Inspector tools
D Inspector settings and SSL proxying list
D Inspector blocklist rules

Pricing

Simple, transparent pricing

Start free with generous limits. Upgrade to Pro for unlimited everything.

Free

$0
forever
  • Full traffic capture
  • HTTPS inspection
  • Search & filter
  • Export HAR / cURL
  • 5 Map Local rules
  • 5 Map Remote rules
  • 1 Breakpoint rule
  • 1 Script

Monthly

Pro
billed monthly · cancel anytime
  • Unlimited Map Local
  • Unlimited Map Remote
  • Unlimited SSL Proxying
  • Unlimited Scripts
  • Unlimited Breakpoints
  • All free features
Popular

Yearly

Pro
billed annually · best savings
  • Unlimited Map Local
  • Unlimited Map Remote
  • Unlimited SSL Proxying
  • Unlimited Scripts
  • Unlimited Breakpoints
  • All free features
Best Value

Lifetime

Pro
one-time payment · forever yours
  • Unlimited everything
  • All future updates
  • No recurring fees
  • All Pro features
  • All free features

Debug APIs smarter, right on your device.

Free for developers. 100% local. All data stays on your iPhone, iPad, or Mac.

Download Free on App Store