Simple-Toolz: Your Free Online Developer Toolkit
Discover Simple-Toolz, a free collection of online developer tools. Converters, generators, formatters, crypto tools, and more, all running client-side.
February 10, 2026
In the fast-paced world of software development, having quick access to reliable utilities can make all the difference. That is exactly why Simple-Toolz exists: a comprehensive, free, and open collection of developer-focused web tools designed to streamline your daily workflow.
What Is Simple-Toolz?
Simple-Toolz is a browser-based platform that brings together dozens of essential developer utilities under one roof. Whether you need to convert data formats, generate random values, format messy code, or work with cryptographic functions, Simple-Toolz has you covered. Every tool is available instantly, with no sign-up required, no software to install, and no fees to pay.
Tools for Every Developer Need
The platform is organized into clear categories so you can find what you need in seconds:
- Converters - Transform data between formats like Base64, JSON to XML, color codes, Roman numerals, number bases, date-time formats, and unit conversions for length, weight, speed, temperature, volume, and area.
- Generators - Create random numbers, strings, passwords, colors, names, UUIDs, and more. Perfect for testing, prototyping, or seeding databases.
- Formatters - Beautify and format JSON, JavaScript, TypeScript, CSS, HTML, YAML, GraphQL, Markdown, and SQL with a single click.
- Minifiers - Compress your JSON, CSS, HTML, JavaScript, and SQL code to reduce file sizes and improve load times.
- Crypto Tools - Hash strings with MD5, SHA-1, SHA-256, and SHA-512. Encrypt and decrypt with AES. Generate bcrypt hashes. Evaluate password strength, create RSA key pairs, work with JWTs, and generate UUIDs and ULIDs.
- Web Utilities - Encode and decode URLs, parse query strings, generate Basic Auth headers, view HTTP status codes, compare JSON documents, decode JWTs, detect device info, parse user agents, slugify text, and handle HTML entities.
- Development Tools - Convert Unix timestamps, build and explain cron expressions, reference a Git cheatsheet, and minify code on the fly.
Privacy and Speed: Client-Side by Design
One of the core principles behind Simple-Toolz is privacy. Every tool runs entirely in your browser. Your data never leaves your machine, and nothing is sent to any server. This client-side architecture also means the tools are fast, as there is no network latency to wait for. Results appear the moment you type.
Built for Modern Developers
Simple-Toolz is built with a modern tech stack including SvelteKit, Tailwind CSS, and TypeScript. The interface is responsive, accessible, and designed with a clean aesthetic so you can focus on the task at hand. The platform supports multiple languages, making it useful for developers around the world.
Why Choose Simple-Toolz?
There are plenty of online tool websites, but Simple-Toolz stands out for several reasons:
- No ads or paywalls - Every tool is completely free to use.
- No data collection - Your input stays in your browser.
- Fast and lightweight - No bloated pages or unnecessary scripts.
- All-in-one - Stop bookmarking a dozen different sites. Everything you need is here.
- Always improving - New tools and features are added regularly.
Whether you are a seasoned backend engineer, a frontend developer, a student learning to code, or a DevOps professional, Simple-Toolz is the toolkit you will reach for every day. Bookmark it, share it with your team, and let it become part of your development workflow.