DevUtils vs Keys Tester

DevUtils is an offline-first developer toolkit with 37+ essential tools — all running privately on your device. No data leaves your phone. PAYLOADS & DATA • JSON Formatter & Validator — Pretty-print, minify, or validate JSON with syntax highlighting • YAML ↔ JSON Converter — Seamless conversion between YAML and JSON • XML Formatter — Indent and beautify XML documents • CSV ↔ JSON Converter — Transform between CSV and JSON formats • SQL Formatter — Format and beautify SQL queries • HTML Entity Encoder/Decoder — Encode and decode HTML entities • Backslash Escape/Unescape — Handle string escaping • Text Diff Checker — Compare two texts and highlight differences ENCODING & DECODING • Base64 Text Encoder/Decoder — Encode or decode Base64 strings • Base64 Image Encoder/Decoder — Convert images to/from Base64 • URL Encoder/Decoder — Percent-encode or decode URLs • HTML Preview — Render HTML snippets live on device • Markdown Preview — Render Markdown with live preview • QR Code Generator — Create QR codes instantly • QR Code Reader — Scan and decode QR codes SECURITY & IDENTITY • JWT Debugger — Decode, inspect, and verify JSON Web Tokens • Hash Generator — MD5, SHA-1, SHA-256, SHA-512 and more • HMAC Generator — Keyed hash authentication codes • UUID/ULID Generator — Generate unique identifiers on demand • Password Generator — Create strong, customizable passwords • RSA Key Generator — Generate RSA key pairs • Certificate Decoder — Inspect X.509 certificates AUTOMATION & REGEX • RegExp Tester — Build and test regular expressions with live matching • Cron Expression Parser — Decode and schedule cron jobs • Chmod Calculator — Unix file permission calculator • Lorem Ipsum Generator — Generate placeholder text TIME & NUMBERS • Unix Time Converter — Convert between Unix timestamps and dates • Date Converter — Parse and format dates in multiple formats • Number Base Converter — Convert between binary, octal, decimal, hex • Color Converter — Convert between HEX, RGB, HSL, and more • Byte Converter — Convert between data size units • Pixel Converter — Convert between px, pt, em, rem ADDITIONAL TOOLS • Text Inspector & Case Converter — Word count, case transforms • List Converter — Sort, deduplicate, transform lists • JSON to Code — Generate model code from JSON • Phone Number Parser — Parse and validate phone numbers • URL Parser — Break down URLs into components All tools work 100% offline. Your data never leaves your device.

Keys Tester — API Key Validator & Monitor Stop guessing if your API keys work. Keys Tester lets you validate API keys against 20+ services in seconds — so you can catch issues before your users do. Key Features: • One-Tap Testing — Validate any API key against 20+ services including Maps, Directions, Geocoding, Places, and more. • Bulk Key Testing — Test all your saved keys at once and get a clear pass/fail summary for every API. • Manual Key Entry — Quickly add keys by pasting them directly into the app. • Real-Time Monitoring — Set up continuous monitoring for your critical keys and receive push notifications the moment an API fails. • Route Tester — Test Directions and Distance Matrix APIs with real pickup and drop-off locations, complete with reverse geocoding and interactive maps. • Detailed Results — See exactly which APIs are enabled, which return permission errors, and which are failing — with full error messages. • Secure & Private — Your keys stay on your device. No data is sent to third-party servers. Perfect for: Mobile & web developers managing Cloud projects QA engineers validating API configurations DevOps teams monitoring production API keys Freelancers auditing client projects Download Keys Tester and take control of your API keys today.