Dev Tools is the ultimate Swiss Army knife for developers. With 168+ utilities, format, encode, decode, convert, generate, and inspect data ā 100% offline with zero server dependency.
**NEW: REST API Client** ā Test APIs on the go with full HTTP method support, request history, collections, Postman & OpenAPI import, environment variables, and offline caching.
Whether you're testing endpoints, generating test data, formatting SQL, inspecting barcodes, or designing CSS ā Dev Tools has you covered.
š REST API CLIENT (NEW!)
⢠Full HTTP method support (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS)
⢠Request history & collections management
⢠Postman collection import (v2.1.0 format)
⢠OpenAPI/Swagger import (3.0+ & 2.0 formats)
⢠Environment variables with {{variable}} substitution
⢠Response caching for offline operation
⢠OAuth2 authentication support
⢠Payload validation & error handling
š§ FORMATTERS & MINIFIERS
⢠JSON Formatter / Minifier / Validator / Diff
⢠XML Formatter / Minifier / Validator
⢠SQL Formatter / Minifier
⢠HTML Beautifier / Minifier
⢠CSS Beautifier / Minifier / SCSSāCSS
⢠JavaScript Beautifier / Minifier
⢠JSON Path Extractor
š ENCODERS & DECODERS
⢠Base64 Encoder / Decoder
⢠URL Encoder / Decoder
⢠HTML Entity Encoder / Decoder
⢠String Escape / Unescape
⢠GZip Compress / Decompress
⢠Hex ā Text, Binary ā Text
⢠Unicode Escape, Morse Code
⢠XOR Cipher
⢠JWT Decoder + Builder
š CONVERTERS
⢠Number Base (binary, octal, decimal, hex)
⢠JSON ā YAML, JSON ā CSV, JSON ā XML
⢠JSON ā Dart, TypeScript, Go, Kotlin, Python, C#
⢠Timestamp, Date Formatter, Date Difference
⢠Timezone Converter, Unix Time Now
⢠Unit Converter, Live Currency Converter
⢠Byte / Data Size, CSS Unit Converter
⢠Cron Parser + Generator
⢠URL Parser, Chmod Calculator
⢠ASCII Table, MIME Type Lookup
⢠CSV ā Markdown, JSON Table Viewer
ā” GENERATORS
⢠Hash (MD5, SHA-1/256/512) + HMAC
⢠UUID, NanoID, ULID
⢠Password + Passphrase + Strength Checker
⢠Username Generator
⢠Lorem Ipsum, Random Data, Random Number
⢠Random String, MAC Address
⢠QR Code (generate + scan), Barcode Generator
⢠Regex Generator
š TEXT TOOLS
⢠Text Case Converter (camelCase, snake_case, PascalCaseā¦)
⢠Regex Tester, Text Diff, Text Analyzer
⢠Text Statistics (words, lines, read/speak time), Find & Replace
⢠List Compare, Number to Words
⢠Slug Generator, Markdown Preview, Markdown ā HTML
⢠Whitespace Remover, Text Trimmer, Text Reverse
šØ GRAPHIC & CSS TOOLS
⢠Color Converter (HEX/RGB/HSL), Color Picker
⢠Color Palette Generator, Contrast Checker
⢠Gradient Generator, Box Shadow Generator
⢠Border Radius Generator, Box Model Debugger
⢠Grid Overlay Debugger, Typography Scale Generator
⢠SVG Viewer + Optimizer
⢠Image Converter, Resizer, Compressor, Cropper
⢠Image ā Base64, Pixel/Unit Converter
š NETWORK & SYSTEM
⢠IP Subnet Calculator, IP Validator
⢠HTTP Status Codes, HTTP Headers Parser
⢠User Agent Parser
⢠Query String Parser + Builder
š¢ MATH & NUMBERS
⢠Scientific Calculator, Bitwise Calculator
⢠Percentage, Prime Checker, Factorial
⢠Fibonacci Generator, GCD, LCM
ā
KEY FEATURES
⢠168+ tools, 100% offline capability
⢠REST API Client with Postman & OpenAPI import
⢠One-tap copy for all tool outputs
⢠Material 3 design with 10 color themes
⢠True Black (AMOLED) dark mode
⢠Favorites & Recent tools home dashboard
⢠Adjustable font size (80%ā140%)
⢠Fast global search across all tools
Built with Flutter for a fast, responsive experience. Perfect for developers, designers, DevOps engineers, QA testers, and coders daily.
Have a tool request? Leave a review ā we update regularly!
168+ developer tools: JSON, CSS, regex, image, hash, UUID, barcode & more
Aktualisiert am
17.08.2026