ABOUT
Built by developers who got tired of the alternatives.
Every other file-conversion site buries a simple task under ad walls, fake download buttons, and mandatory signups. Dev Learning Tools (devlearningtools.com) is the opposite bet: small, fast, single-purpose tools that run entirely in your browser.
The problem we kept running into
Converting an image to a PDF, formatting a chunk of JSON, or generating a UUID shouldn't take more than a few seconds. In practice, most of the sites that offer these things bury the actual tool under intrusive ad placements, countdown timers before a download unlocks, or a signup wall right when you're one click from finishing. Some quietly upload whatever you paste in to a server you know nothing about, for a task that never needed a server at all.
DevLearningTools started as a reaction to that — a place to put the small, boring, genuinely useful tools developers reach for constantly, built the way we'd actually want to use them ourselves.
What's here
Two things, really. The first is a growing toolbox of file and text utilities — converters, minifiers, formatters, encoders, and calculators — each built as its own focused page rather than one bloated all-in-one tool that's slow to load and confusing to use.
The second is Learn — practical guides on file formats and conversion, and a growing set of programming language courses, starting with a full modern ColdFusion / CFML course built from the ground up for this site.
How the privacy promise actually works
When a tool here says it runs "in your browser," that's a specific technical claim, not marketing language: the conversion, formatting, or calculation logic is JavaScript executing on your device, and the file or text you're working with is never sent in a network request to any server. You can verify this yourself — open your browser's developer tools, watch the network tab, and use any of the file or text tools. You won't see your content leave the page. (Loading the page itself, and the ads that help pay for hosting, still involve normal web requests — the privacy promise is specifically about your file and text content, not about the page loading at all.)
What we stand for
Privacy-first
File tools run entirely in your browser's own JavaScript. Your file, text, or query never gets uploaded to a server — there's nothing to intercept, log, or lose, because it never leaves your device in the first place.
No signup
No accounts, no email walls, no 'create a free account to continue' right when you're one click from finishing what you came to do. Open a tool, use it, done.
Free forever
The core tools stay free, with no usage caps or premium tier hiding the features that actually matter. Ad rails pay the bills, not paywalls.
Built in public
Progress, mistakes, and the roadmap are all visible rather than polished after the fact — see the blog for the unfiltered version.
How this stays free
Running a site costs money even when every tool is free to use — hosting, a domain, and the time spent actually building and maintaining things. Rather than a premium tier or a paywall on the tools people actually need, this site runs on ad placements along the sides and bottom of the page. They're kept out of the way of the actual tools on purpose — an ad blocking the thing you came here to use would defeat the entire point.
What's next
New tools and lessons ship incrementally, in the open, based on what's genuinely useful rather than what's quick to fake. The Tools and Learn ColdFusion pages both show a roadmap of what's live today and what's still marked "Soon," so nothing pretends to be finished before it actually is.
Get in touch
Found a bug, have a tool you wish existed, or just want to say something didn't work the way you expected? The Contact page goes straight to a real inbox, not a support queue.