Free, fast, privacy-first developer tools — built by developers who were tired of slow, bloated alternatives.
Every developer uses micro-tools daily — decoding a JWT token, formatting a JSON response, converting a timestamp, generating UUIDs for test data. The existing tools online are slow, full of intrusive ads, and some even send your data to their servers. We built FreeDevTool because developers deserve better.
Every tool on FreeDevTool runs 100% in your browser using JavaScript. Nothing you type, paste, or upload ever leaves your device. There are no accounts, no server-side processing, and no data logging. You open a tool, use it, and leave. That is it.
FreeDevTool is a static site hosted on a global CDN. Pages load in under 1 second. There are no heavy JavaScript frameworks, no render-blocking requests, and no unnecessary dependencies. We use vanilla HTML, CSS, and JavaScript because your tools should load instantly — not after a 3-second spinner.
FreeDevTool is built and maintained by an independent developer who uses these tools every day. The site is hand-coded in vanilla HTML, CSS, and JavaScript — no frameworks, no build pipeline, no analytics-heavy template generators. Every tool is something the maintainer needed personally, then polished into something other developers can rely on too.
Independent developer building tools that respect your time and your data. FreeDevTool started because every existing JSON formatter was either ad-loaded, slow, or sent your data to a server. So I built one that doesn't.
Have a tool request, found a bug, or want to suggest an improvement? We are constantly adding new tools based on what developers actually need. Bookmark our toolbox and check back regularly — we ship something new every few weeks.
FreeDevTool will always be free. There are no premium tiers, no upsells, no upgrade prompts. We use lightweight, privacy-respecting analytics only to understand which tools developers find useful — never to identify or track individuals.