About DEVTOOLIO

DEVTOOLIO is a pile of small web tools: calculators, converters, image and file helpers, writing editors, and a few developer utilities. I built it so you can finish a task and leave. No app, no account.

What you can do here

Check BMI or a loan payment. Convert kilograms or file sizes. Resize a photo on your machine. Format JSON or decode a JWT. The full list is on the tools page.

Where the work happens

Most pages do the math or the file work in your browser. We do not get a copy of the numbers, drafts, or files you drop in. If a tool ever needs a server, the page will say so first.

What we will not offer

No YouTube, Instagram, TikTok or Facebook downloaders. Those usually break platform rules and help people copy work they do not own. Writing tools are for text you wrote. They are not a way to hide a copied essay.

Ads

The tools are free. We may show Google ads later to cover hosting. You do not have to click an ad to see a result. Guides explain formulas and privacy. They are not product pitches.

Contact

Corrections, tool requests and privacy questions: devexe01@gmail.com or the contact page.