FreeToolDev is a small set of free, browser-based utility tools for developers and designers — built around one idea: most tasks worth automating come in batches, not single files.
Most free online tools are built for one file, one string, one lookup at a time. That's fine until you have thirty images to resize, or a dozen CSV exports to convert, or a list of domains to check — at that point, doing it "for free" one-by-one costs more time than a paid tool would have saved. FreeToolDev exists for that second case: the same tools, but built from the start to take a batch as input.
Everything on this site that can run in a browser, does — Base64, CSV conversion, image processing, feed and sitemap generation are all handled entirely client-side using standard web APIs (Canvas, btoa/atob, FileReader). Nothing is uploaded to a server for these tools; you can verify this yourself by checking your browser's Network tab while using them. A couple of tools (DNS/SSL lookups, the site crawler) genuinely need a server component, since browsers are deliberately restricted from making arbitrary cross-origin requests — those are clearly explained on their own pages.
FreeToolDev is an independently run, ad-supported site. It isn't backed by a company or a team — it's built and maintained by one person who got tired of re-uploading the same batch of files into five different single-purpose tools.
Through display advertising and, where relevant, affiliate links to developer tools and services. Free tools and free hosting both cost something to run; ads are the tradeoff that keeps everything here free with no account required. Tool functionality is never gated behind ads or a paywall.
Questions, bug reports, or a tool idea that fits the "batch" theme — see the Contact page for the fastest way to reach out.