e309 Tools is a free collection of 152 browser-based utility tools across 16 categories — GST and business documents, PDF and image editing, developer utilities, QR codes, SEO tools, network lookups, and a set of party/classroom tools for anyone organizing a game night or a class.
Everything here runs in your browser. Where a tool genuinely needs to reach a server — a DNS lookup, a WHOIS query, an SSL certificate check — that's disclosed plainly on the tool itself and in the Privacy Policy, rather than left for you to assume either way.
There's no login, no account, and no file upload for the vast majority of tools here — the whole point is that you shouldn't need to hand over a document or an account just to compress an image or format a GST invoice.
e309 Tools is one of a small family of free, ad-supported sites built the same way — no login, straightforward tools, nothing hidden about what happens to your data:
Write to tools@e309.in — for a bug report, a tool suggestion, or anything that looks wrong on a specific page.