ZIPZAX credits the open-source project running inside its own diagram tool

A Lisbon-built collection of 482 free tools, with one quiet admission tucked into its flowchart maker: the canvas is Excalidraw, the open-source drawing project, running under its own MIT license with a direct link back to the source code.

Most “all-in-one tools” sites blur the line between what they built and what they borrowed. ZIPZAX’s Diagram Studio doesn’t bother blurring it. Scroll to the bottom of the page and it states plainly: “ZIPZAX Diagram Studio includes the Excalidraw project under its MIT licence,” with a direct link to the upstream GitHub repository. For a site whose entire pitch is “stop hunting for a different website every time,” naming the specific open-source project doing the actual drawing work is a small, unglamorous kind of honesty most competitors skip.

A tool count that keeps moving

ZIPZAX currently lists 482 free tools across 15 categories, documents and PDFs, images, video and audio, converters, security, developer utilities, calculators, SEO, and a catch-all “fun and misc” bucket, all reachable without an account. Ten of those entries are bigger than a single utility: named Studios for image editing, video, PDF work, audio, diagrams, a code playground, résumé building, a website builder, a Python notebook and data visualization, each one a full workspace rather than a one-shot converter.

Built by a small, named team in Lisbon

The operation traces back to a specific person rather than an anonymous corporate shell: founder Max Hall, with a registered address on Rua Leite De Vasconcelos in Lisbon. That’s a meaningfully different posture from the dozens of interchangeable “free online tools” domains that share templates and give no indication of who runs them or where. A named founder and a street address don’t guarantee quality, but they’re the kind of detail a fly-by-night SEO farm typically doesn’t bother including.

Most tools never touch a server at all

The site’s own data-handling note draws a clean, specific line: 411 of its 482 tools never upload the file or text being worked on, running entirely inside the visitor’s browser. The remaining ones split into two honest exceptions: 14 website and network-check tools that have to contact a ZIPZAX server because a browser genuinely cannot inspect an arbitrary public endpoint on its own, and 57 AI tools that process submitted text through what the site calls its own AI engine. Labeling that distinction tool-by-tool, rather than issuing one blanket privacy promise for the whole catalog, is the kind of granularity that’s easy to skip and expensive to maintain correctly across hundreds of separate pages.

The honest shape of a tool built on borrowed parts

None of that makes ZIPZAX unusual in what it does. Diagram makers, PDF mergers and password generators are commodity software at this point, and nearly every one of them is assembled, to some degree, from open-source components nobody advertises. What’s worth noticing is the choice to say so, in public, on the page where a user is actually working, rather than burying it in a terms page nobody reads. A tool collection this size survives on trust accumulated one small, correct detail at a time, and crediting the software you didn’t build yourself is one of the cheapest, most overlooked ways to earn it.

Author:
Jan Bielik
CEO & Founder of Webiano Digital & Marketing Agency

Sources

• ZIPZAX (official site) – tool count, category breakdown, Studios list, founder and address, data-handling split
• Diagram Studio — ZIPZAX – Excalidraw attribution and MIT license credit, feature list, export options

This article was prepared with the assistance of artificial intelligence tools. The content underwent expert human review, and Webiano Digital & Marketing Agency assumes editorial responsibility for its final version and publication.