Free tools. One hub. Zero friction.

Free online tools for web developers, freelancers, and fitness enthusiasts

Other Useful Tools is a growing directory of free-to-use online utilities that cover a wide range of everyday needs. There are no accounts to create, no subscriptions to manage, and no features locked behind a paywall. Every tool here works instantly in the browser. You open the page, use the tool, get your result, and move on. That is the entire experience.

The collection spans multiple categories including web development, fitness and nutrition, and business planning. Each tool lives on its own dedicated domain so it can focus entirely on solving one specific problem without distractions. This hub page ties them all together so that when you discover one tool and find it useful, you have a clear path to explore the rest of the collection.

Web development tools

Our web development toolkit includes utilities that eliminate repetitive calculations and boilerplate code. The CSS Clamp Generator at clampgen.com lets you create fluid typography and spacing values using the CSS clamp() function. You enter a minimum size, a maximum size, and a viewport range, and it outputs a production-ready clamp() declaration. It also supports full modular type scale generation with ratios like Major Third, Perfect Fourth, and Golden Ratio, so you can build an entire responsive type system in seconds. Both viewport width (vw) and container query width (cqw) units are supported.

The Srcset Builder at srcsetbuilder.com solves the problem of writing correct responsive image markup. You define your breakpoints and image widths, and it generates a valid srcset attribute and a sizes attribute that match. The output is a copy-ready img tag you can drop directly into your HTML. No more guessing at width descriptors or manually calculating which image should load at which viewport.

The CSS Layout Generator at csslayoutgen.com is a visual builder for CSS Grid, Subgrid, and Flexbox layouts. It provides starter templates for common patterns like holy grail, sidebar, dashboard, and card grids. You can click to add items, drag to resize columns and rows, and toggle between Grid and Flexbox mode. When you are done, it exports clean CSS and HTML that you can copy into your project. It handles named grid areas, explicit track sizing, gap values, and alignment properties without requiring you to memorize the spec.

Fitness and nutrition calculators

The Macro Calculator at calmacrocal.com is a comprehensive body composition and nutrition tool. It calculates your Basal Metabolic Rate using both the Mifflin-St Jeor equation and the Katch-McArdle formula (when body fat percentage is known). From your BMR it derives your Total Daily Energy Expenditure based on your activity level, and then it splits that into protein, carbohydrate, and fat targets using discipline-specific macro ratios. Whether your goal is strength training, endurance work, fat loss, or muscle building, the calculator adjusts the split accordingly.

It also includes a body fat percentage estimator using the U.S. Navy Method (waist, neck, and hip circumference) and a heart rate training zone calculator using the Karvonen formula. All of this is available instantly without creating an account, entering an email address, or downloading an app.

The One Rep Max Calculator at onerepmaxx.com estimates your single-rep maximum from a weight and rep count using three established formulas: Brzycki, Epley, and Lombardi. Rather than giving you a single number, it shows you all three estimates side by side so you can see where the consensus falls. Beyond the basic estimate, the tool generates a customizable warm-up ramp that progressively loads you to your working weight. It includes a competition attempt selector for powerlifting meets, a reverse calculator that works backward from a target 1RM to tell you what weight and reps you should be hitting in training, and a PR history tracker that stores your personal records locally in the browser over time.

Business and freelance utilities

The Freelance Rate Calculator at freelanceratewise.com helps independent workers understand their true hourly rate. Most freelancers set their rate by gut feeling or by copying what others charge, without accounting for the hours they spend on administration, marketing, invoicing, and other non-billable work. This tool asks for your target annual income, your estimated tax burden, your monthly overhead and business expenses, and the percentage of your working hours that are actually billable. It then calculates your survival rate (what you need to break even) and your growth rate (what you need to save, invest, and build a buffer).

The result is a clear number that accounts for reality instead of assumptions. It is especially useful for freelancers transitioning from full-time employment who do not yet have an intuition for what their time is worth once benefits, paid time off, and employer tax contributions disappear from the equation.

Why a centralized tool hub?

Each tool in this collection is designed to do one thing well and load fast. They are intentionally simple, single-purpose pages with no bloat. But that simplicity creates a discovery problem: if someone finds the macro calculator through a search engine, they have no reason to know that a CSS layout generator or a freelance rate calculator exists from the same source.

This hub solves that. Every tool links back to this page, and this page links out to every tool. The search bar and category filters let you find what you need quickly. As the collection grows, new tools appear here automatically. Bookmark this page once and you will always have access to the full directory.

Built for speed, privacy, and accessibility

All tools in this collection are static sites with no server-side processing. Your inputs stay in your browser. Nothing is sent to a database, and nothing is tracked beyond standard anonymized analytics. Every tool is built to meet WCAG 2.2 AA accessibility standards with proper heading hierarchies, keyboard navigation, focus indicators, and screen reader support. They load fast on any connection because they ship minimal JavaScript and no heavy frameworks.

Whether you are a front-end developer looking for layout shortcuts, a personal trainer who needs quick nutrition math, or a freelancer trying to price your services honestly, this hub has something useful. Use the search and category filters above to find what fits your workflow, and check back regularly as new tools are added.