About Wrenlio
Free tools that just work
Wrenlio is a free collection of 67+ browser-based tools — PDF and image editors, developer utilities, calculators, and a growing set of career tools including a resume builder, cover letter generator, and ATS resume checker.
Why we built it
Most "free" tool sites bury a real utility under sign-up walls, file upload limits, or forced watermarks. We wanted something that just works: pick a tool, use it, get your result — no account, no upload to a server, no catch. Every tool on Wrenlio runs entirely in your browser using the same open web technologies powering modern apps, so your files and data never leave your device.
How it stays free
Wrenlio is supported by advertising rather than subscriptions or paywalls. That means keeping ads reasonable and out of your way is a design principle, not an afterthought — see our Privacy Policy for details on how advertising works on this site.
What's next
We're actively building out the career tools section — interview prep, career roadmaps, salary calculators, and more — alongside new additions to the core tool library. If there's a tool you wish existed, let us know.