MU
MUHAMMAD USMANSOFTWARE ENGINEER • FLUTTER & AI
ENGINEERING TOOLBOX // FREE WEB UTILITIES

Developer Utilities & Diagnostics

A high-performance suite of browser-native diagnostics and developer tools built for speed, security, and convenience. Zero telemetry, instant client-side execution, and clean cyberpunk developer UI.

ONLINE // READY
NETWORK // SOCKET

SMTP & Mail Diagnostic Tester

Test SMTP mail server connection handshakes, verify SSL/TLS certificates, validate credentials, and simulate test delivery with real-time socket logs.

Custom host & port validation (25, 465, 587, 2525)
SSL/TLS & STARTTLS encryption handshakes
SMTP Auth credentials tester (Plain / Login)
#SMTP#Email
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ONLINE // READY
SECURITY // CRYPTO

JWT Token & Claims Inspector

Decode and analyze JSON Web Tokens client-side. Inspect algorithm headers, payload claims, and live expiry countdown timers with zero data leakage.

100% Client-side decoding (zero backend data storage)
Live real-time token expiry countdown timer
Interactive claims breakdown with tooltip definitions
#JWT#Auth
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ONLINE // READY
API // CODEGEN

REST Payload & Multi-Language cURL Converter

Compose API requests with custom headers, query params, and body payloads. Instantly convert into Dart/Flutter http/dio, Python requests/httpx, and Node fetch code.

Bidirectional: Parse raw cURL strings or build visually
Flutter / Dart: http & dio package generators
Python: requests & async httpx code synthesis
#cURL#Flutter
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ONLINE // READY
SCHEDULING // TIME

Cron Schedule & Epoch Visualizer

Translate 5-part and 6-part cron expressions into plain English schedules. Preview the next 10 execution timestamps and calculate Unix epoch times.

Human-readable cron schedule translation in plain English
Next 10 execution timestamp previews with timezone switching
Visual schedule builder for minutes, hours, days, and weekdays
#Cron#Epoch
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ONLINE // READY
DNS // DoH

DNS & MX / SPF / DKIM Record Inspector

Query DNS records (A, AAAA, MX, TXT, CNAME, NS) directly using DNS-over-HTTPS. Verify mail server routing, SPF records, and DMARC policies in seconds.

Query A, AAAA, MX, TXT, CNAME, NS, SOA, and PTR records
Direct DNS-over-HTTPS (DoH) engine with zero server proxies
SPF & DMARC email authentication security check
#DNS#MX
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ONLINE // READY
IAB SPEC // MOBILE ADS

IAB app-ads.txt & ads.txt Validator

Validate app-ads.txt and ads.txt files against the official IAB Tech Lab specification. Check publisher IDs, DIRECT vs RESELLER relationship syntax, and certification IDs.

Full IAB Tech Lab v1.1 specification compliance validator
Syntax highlighter for domain, publisher ID, relation, and auth IDs
Direct vs Reseller relationship validation
#app-ads.txt#AdMob
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ONLINE // READY
CRYPTO // ENCODING

Developer Hash, Base64 & UUID Utility

Generate cryptographic hashes (SHA-256, SHA-512, MD5), encode/decode Base64 strings with live image previews, URL encode, and batch generate UUID v4 identifiers.

High-speed SHA-256, SHA-512, SHA-384, SHA-1, and MD5 hashing
Base64 encoder & decoder with automatic Data URI image preview
URL component encoder and decoder for query strings
#Hash#SHA-256
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Need a custom diagnostic script, API testing fixture, or specialized security tool?

REQUEST A TOOL // GET IN TOUCH