Everyday apps,
effortlessly simple
Practical mini-apps for daily tasks - clean design, fast results, no sign-up.
Popular Apps
Built for your daily workflow
Handcrafted utilities that save you time and help you get things done.
Image Text Overlay
Add customizable text overlays to images with real-time preview.
Color Converter
Convert between HEX, RGB, HSL and generate beautiful palettes.
Pomodoro Timer
Stay focused with customizable work and break intervals.
Percentage Calculator
Calculate percentages, percent change, and ratio-to-percent in one place.
Tip & Bill Split Calculator
Split a bill with tip and tax so every share always adds up.
FairTab Group Expense Splitter
Split group expenses with a simple settle-up plan. No login, no limit.
Image Resizer
Resize images to exact dimensions in your browser and download instantly.
QR Code Generator
Generate QR codes for links, docs, menus, and flyers instantly.
UTMatic
Build UTM-tagged URLs for Google Analytics campaign tracking.
AI Text Cleanup
Strip AI-writing tells from pasted text: em dashes, curly quotes, hidden Unicode, and Markdown.
Why STSApps
Small tools that do one job well
STSApps is a growing set of small, focused tools for everyday tasks: quick math, image tweaks, and campaign links. Each one does a single job well, opens instantly, and works on your phone or your desktop.
There is nothing to install and no account to create. The tools run in your browser, so the numbers, images, and text you work with stay on your device.
Each tool opens straight to the task, with the controls first and a short explanation below, instead of a marketing page in front of the feature. Where a tool has a related guide, it links to it, so you can read the how and why when you want the background and skip it when you just need the answer.
Explore
Browse by category
Find the right tool by the kind of task you are doing.
FAQ
Common questions
Frequently asked questions
- Do the tools cost anything?
- No. Every tool listed here is free to use, with no trial window, usage cap, or paid tier to unlock. The site is supported by unobtrusive ads rather than by charging for the utilities themselves.
- Do I need an account?
- No account, email, or sign-up is needed. You can open any tool and start using it right away, and there is no profile to manage because the tools do not create one.
- Do the tools work on mobile?
- Yes. Each tool uses a responsive layout that reflows for smaller screens, so the calculators, image tools, and link builders work with touch on a phone as well as with a mouse on a laptop.
- Does my data leave my device?
- Most tools do their work in your browser, so the numbers, images, and text you enter are processed on your own device and are not uploaded unless a tool clearly needs to send something to finish its task.
- Are new tools added over time?
- Yes. The collection is maintained and expanded, and each tool is kept deployed and updated rather than shipped once and left alone. New utilities appear here as they are built and tested.