Our principles

Every Multilities tool runs inside your browser. PDFs are parsed and rewritten with pdf-lib, images are re-encoded through the canvas API, hashes are produced by the SubtleCrypto API. Nothing is uploaded, nothing is queued on a server, nothing is held in temporary storage we operate. Close the tab and the file is gone from our reach instantly.

We choose this over the easier server-side architecture because the wrong file leaking from a third-party converter can cost you a deal, a job, or your privacy. A signed contract, a medical scan, a tax return — these are not things you should hand to a random web service. Doing the work locally is the only architecture where this promise is enforceable.

There is no sign-up flow because there is nothing to sign up for. We do not have user records, you do not have a password to reset, there is no email list. Every feature works the same on the first visit as it does on the hundredth.

This is not a free-tier trick where the real product is behind a paywall. The tools you use today are the tools we offer. We will tell you clearly the day that changes.

If a page takes three seconds to become interactive on a four-year-old mid-range phone, that is two seconds too many. The site is statically exported, deployed on Cloudflare's edge network, and ships only the JavaScript a given tool actually needs. We push back against features that would force everyone to download a heavier bundle for a workflow a minority will use.

Every tool says what it cannot do, not just what it can. The PDF compress tool tells you when re-rendering will lose searchable text. The BMI calculator notes that it is a screening tool and not a diagnosis. The currency converter discloses that the rates come from a free third-party feed and should not be used for trading decisions. We would rather lose a few clicks to a competitor that exaggerates than have a user discover a problem after they have committed.

Tool descriptions, FAQs, and blog posts are drafted and reviewed by people. We use translation models to draft non-English versions, but a human reads every translation before it ships and rewrites whatever sounds machine-generated. We do not auto-generate hundreds of pages to chase long-tail keywords. If a topic is not worth writing properly, we do not publish a page about it.

Multilities is not a venture-backed product with a roadmap and OKRs. It is a self-funded site maintained by a small team that uses these tools every week. Our goal is to be a quietly useful corner of the web — the place you bookmark when iLovePDF shows you yet another "Sign in to continue" wall. If we ever change ownership, take investment, or shift the model, we will say so on this page.