About a year ago, I started building small, free web tools. Not a SaaS. Not a startup. Just... tools. Useful things that solve one problem each, run in the browser, and don't require signups.
Fourteen tools later, here's what I've learned.
How It Started
It started with image formatting. I needed to resize and convert images for a project, and every "free" tool online was either plastered with ads, required an upload to some random server, or had a 5-image daily limit.
So I built FormatPic — a browser-based image formatter. Resize, crop, convert formats. Everything happens client-side. No uploads, no server processing. Your images never leave your browser.
It took a weekend. People started using it. And I thought: what else can I build like this?
The Tools
Over the next several months, I built a bunch more:
- Compresso — Image compression, client-side. Handles JPEG, PNG, WebP with quality controls.
- QRCodeGen — QR code generator with customization (colors, logos, sizes).
- ToolCove — A collection of developer utilities: JSON formatter, base64 encoder, hash generators, regex tester, and more.
- ParaphrasePro — AI-powered text paraphrasing with different tone options.
- SummarizePro — Text summarization tool for long articles and documents.
- GrammarPro — Lightweight grammar and spelling checker.
- HumanTone — Makes AI-generated text sound more natural.
- Translately — Multi-language translation tool.
Plus a handful of others in various niches. Each one follows the same philosophy: free, fast, no signup required.
What I Learned
1. Client-Side Processing Is a Superpower
The single best decision I made early on was doing as much processing as possible in the browser. For image tools like FormatPic and Compresso, this was a no-brainer — people are understandably nervous about uploading their photos to random websites.
But it goes beyond trust. Client-side processing means:
- No server costs for compute-heavy operations
- No file size limits (within reason — your browser is the limit)
- Better privacy by default
- Lower latency — no upload/download round trip
The Canvas API, Web Workers, and WebAssembly have made browser-based processing genuinely powerful. You can do things in 2026 that would have required a beefy backend five years ago.
2. One Tool, One Job
Every tool I've built does one thing. QRCodeGen generates QR codes. Compresso compresses images. That's it.
I was tempted early on to build an "everything tool" — combine image editing, compression, format conversion, and QR codes into one mega-app. I'm glad I didn't.
Single-purpose tools are easier to build, easier to explain, and easier for people to find. When someone Googles "free QR code generator," they want a QR code generator, not a Swiss Army knife they have to figure out.
3. The Tech Stack Doesn't Matter (Much)
I've used different stacks across these projects — vanilla JavaScript, React, Next.js, Astro. Here's the honest truth: for small, single-purpose tools, the framework barely matters.
What matters more:
- Page load speed — people will leave if your tool takes 3 seconds to load
- Mobile responsiveness — more than half my traffic is mobile
- No unnecessary dependencies — every KB counts
For ToolCove, I went with a more structured framework because it's a collection of tools that share components. For simpler tools, I kept it minimal. Use what you know, ship fast, optimize later.
4. SEO Is the Real Product
This one stung. Building the tool is maybe 30% of the work. The other 70%? Getting people to find it.
I learned SEO the hard way — through months of minimal traffic despite having genuinely useful tools. What eventually worked:
- Clear, descriptive page titles and meta descriptions
- Fast load times (Core Web Vitals matter)
- Writing content that answers the questions people actually search for
- Building backlinks through honest content (like this article)
The tools that rank well aren't necessarily the best ones — they're the ones that search engines understand and trust. It's frustrating, but it's the game.
5. Free Doesn't Mean No Revenue
All my tools are free with no paywalls. But "free" and "no business model" are different things.
Modest ad revenue adds up across 14 tools. Some tools drive traffic to others. The AI writing tools have optional premium features. And the portfolio itself has value — it demonstrates what I can build.
I'm not getting rich, but the tools collectively generate enough to justify the time and hosting costs. Sometimes the indirect value (learning, portfolio, connections) matters more than direct revenue anyway.
6. People Will Surprise You
The most rewarding part has been seeing how people use these tools. Teachers using QRCodeGen for classroom activities. Small business owners compressing product images with Compresso. Non-English speakers using Translately for daily communication.
I built these tools for developers and writers. The actual user base is way more diverse than I expected.
7. Maintenance Is the Hidden Cost
Fourteen tools means fourteen things that can break. Browser APIs change. Dependencies get vulnerabilities. SSL certificates expire. Users find edge cases you never imagined.
I spend more time maintaining existing tools than building new ones now. That's fine — it's a sign they're being used. But if I could go back, I'd invest more in monitoring and automated testing from day one.
What's Next
I'm not done building. There are still problems I encounter daily that don't have good free solutions. And honestly, the process of shipping something small and useful is addictive in a way that big projects aren't.
If you're thinking about building your own tools — do it. Start with a problem you have. Keep it simple. Ship it. See what happens.
The worst case? You learn a ton and have something cool to show for it. The best case? You build something that actually helps people.
That's a pretty good deal.
If you've built free tools or side projects, I'd love to hear about them. What worked? What didn't? Drop a comment below.
Top comments (0)