Miller Tools offers a suite of offline developer utilities designed for use on Mac and Windows systems. Below are 8 developer tools apps with similar functionality to Miller Tools, matched by what each product actually does — not ranked or scored. Explore each to find the closest fit for your use case.
Devy Tools is a free web-based suite offering over 180 developer utilities, including JSON formatting, encoding/decoding, cryptography, and data conversion tools. It is designed for developers who need quick, privacy-friendly tools in the browser.
DevToolKit is a free web-based suite of tools for developers, offering utilities such as JSON formatting, Base64 encoding, JWT decoding, GitLab CI configuration, cron parsing, and PostgreSQL config generation. It is designed for developers who need quick, no-signup tools for common development tasks.
DeveloperToolsKit is an online platform offering a broad suite of utilities specifically designed for software developers. Its purpose is to streamline and simplify common development tasks by providing a single, accessible interface for a diverse range of tools. The platform is structured around seven categories, encompassing over 35 individual utilities that address text manipulation, data formatting, color selection, encoding, security, and web-related needs. Among its notable features are text case converters, word and character counters, lorem ipsum generators, regex testers and builders, and text diff checkers. Data and format tools include JSON and XML formatters, converters between formats such as JSON, XML, YAML, and CSV, as well as a CSV viewer with Excel export capabilities. Users can also access HTML, CSS, and JavaScript minifiers and beautifiers, a variety of numerical converters, random value generators, and color utilities such as palette generators, HEX/RGB converters, and image color pickers. For web and API-related tasks, DeveloperToolsKit provides tools like IP address lookup, ping and traceroute simulators, and a mock JSON API generator. Security-focused utilities include hash and HMAC generators (supporting algorithms like MD5, SHA-1, and SHA-256), password generators with customizable options, QR code creators, UUID generators, and tools for encoding and decoding data (Base64, URL, JWT). Time and date utilities such as timezone converters, Unix timestamp converters, ISO 8601 generators, and cron expression builders are also available. The platform is delivered entirely through the web and operates fully within the user's browser, ensuring that no data is sent to external servers and all information remains on the local device. It supports both desktop and mobile devices with a responsive design, and offers features such as dark and light themes and a favorites system for personalizing the toolset. DeveloperToolsKit is completely free to use, requires no registration, and imposes no hidden fees or premium features. The toolset is updated regularly based on user feedback to address evolving developer needs.
DevToolBox is a free online suite offering over 50 browser-based tools for developers, including formatters, encoders, decoders, and validators for various data types and code formats. No signup is required, and all processing happens locally in the browser, ensuring privacy and speed.
DevToolBox is a free web application offering over 90 essential tools for developers, including JSON formatting, regex testing, encoding/decoding, and more. It requires no signup and processes data locally in the browser for privacy and speed.
Tools for Developers is a web-based suite offering a variety of free utilities such as JSON formatting, encoding/decoding, UUID and hash generation, and more. It is designed for developers who need quick, browser-based tools without the need for installation.
AllDevToolsHub is a collection of browser-based utilities designed for developers seeking quick access to a wide range of tools without installation or login requirements. The platform offers more than 250 free tools across various categories, including formatters, encoders and decoders, generators, testers, converters, design tools, development tools, security and cryptography utilities, AI tools, DevOps resources, database helpers, PDF tools, and networking utilities. It emphasizes instant results and privacy, with all processing performed client-side, ensuring that no data is sent to external servers and the tools can work offline. Among the featured utilities are an AES Encrypt/Decrypt tool that allows users to encrypt and decrypt text using AES-256-GCM and PBKDF2 key derivation entirely within the browser. Other highlighted tools include a Base64 encoder and decoder, a CSS box-shadow visual editor, a color palette generator for creating various color harmonies, an advanced color picker supporting multiple color formats (HEX, RGB, HSL, CMYK), and a crontab expression generator with a visual interface. env file parser and an HTTP Status Encyclopedia as part of its resources. AllDevToolsHub is intended for developers who require immediate, frictionless access to common utilities for formatting, encoding, generating, testing, and designing tasks. Its browser-only delivery model means there is no need for software installation or user registration, and its client-side processing approach is designed to maintain user privacy and enable offline use. All tools are available free of charge. The service positions itself as a comprehensive suite of developer tools, simplifying routine development and design tasks by providing a centralized, browser-based resource.
FreeDevTools Studio provides a collection of free online utilities designed for developers and related roles. The platform brings together over 70 tools across 10 categories, making it a destination for building, debugging, converting, and creating without the need for installation or registration. Its tools are intended for quick, one-off tasks and are accessible directly through a web browser, with many running entirely on the client side for privacy. The suite covers a wide range of functions, including developer utilities for formatting and validating JSON, generating file hashes, and building API requests. It also features design and UI tools such as color pickers, image resizers, and generators for QR codes and prompt templates. Media processing is supported with tools for trimming audio, resizing and compressing images, and converting between image formats. Additional categories include calculators, unit and currency converters, timezone tools, and cheat sheets for quick reference. The platform highlights popular tools like an AI token calculator, LLM cost calculator, and stopwatch. FreeDevTools Studio is aimed at developers, designers, and anyone needing lightweight, browser-based utilities for tasks such as code formatting, asset creation, media editing, and conversions. The interface is designed for fast access and ease of search, allowing users to start using any tool immediately without creating an account. All utilities are free to use, and the platform emphasizes privacy by not requiring registration or collecting user data. evidence_sufficient: true
