About ZeroUtil

Who we are

ZeroUtil is operated by the ZeroUtil Editorial Team. It is an independent publishing project offering 200+ free utilities across 16 categories — text, developer utilities, image and PDF editors, calculators, converters, SEO helpers, and more. Every line of code is reviewed before it ships. Every tool exists because users need it, not because a growth team demanded another SEO landing page.

Why we built this

The honest origin story: you need to convert a PDF, count words in a document, format some JSON, or generate a QR code. You search Google, land on a random site, and get ambushed.

It wants your email before it shows results.
It uploads your file to "the cloud" — even though the task is one line of JavaScript.
It's wrapped in four popups, a cookie wall, and a chat widget.
The real feature is hidden behind a "free trial — credit card required" page.
The output is watermarked, or capped at five uses per day.

That's what the web looks like in 2026, and it shouldn't have to. A PDF merge is a few lines of JavaScript. A percentage calculator is one formula. A base64 encoder is a built-in browser API. None of it needs an account, a server round-trip, or a subscription. That is the whole pitch behind zero tools: ZeroUtil exists because the internet deserves a small corner where "free" means free and "private" means the data literally never leaves your device.

How the tools actually work

Almost every tool on ZeroUtil runs client-side, inside your own browser. That is not a marketing slogan - it is an architectural rule the site is built around. We use standard web APIs (File API, Canvas, Web Crypto, Web Workers, WebAssembly) and a few carefully chosen open-source libraries.

What that means in practice for the client-side tools:

When you drop a PDF into the merge tool, that PDF is loaded into memory on your device. The binary never travels to our servers, not even as a temporary upload.
When you generate a QR code, the pixels are drawn directly by your browser's Canvas.
When you hash a password, the cryptography runs locally in a sandboxed Web Worker.

You can verify this yourself: open DevTools, go to the Network tab, use any of the client tools, and you will see no outbound requests carrying your content. The only network activity is the page itself, analytics pings, and ad requests - never your data.

The exception: heavy media tools

A handful of tools cannot run in the browser. Decoding and re-encoding modern video and audio with FFmpeg requires hundreds of megabytes of memory and a full FFmpeg build, which is too large to ship to a phone tab. Those tools - currently the video to GIF converter, video trimmer and video converter - upload your file to api.zeroutil.com over HTTPS, run FFmpeg on an EU server, and return a signed download URL.

Both the input and the output are auto-deleted within 15 minutes. We do not store, log or analyse the content. There is no admin dashboard that can replay your upload. Each backend tool page also displays a clear notice above the workspace so you know the work is happening server-side. The rest of the site keeps the original promise of zero uploads.

Our principles

We're opinionated about what ZeroUtil is not:

No accounts. Ever. Not "sign up for extra features." Not "email us to unlock." Open the tool, use it, close the tab.
No uploads, with one honest exception. Client-side tools never touch our servers. The handful of heavy-media tools that have to upload (video to GIF, video trimmer, video converter) auto-delete the file from our EU server within 15 minutes, and the tool page tells you so up front.
No dark patterns. No fake "your download starts in 5... 4... 3..." timers. No shame buttons on the "no thanks" option. No pre-checked newsletter opt-ins.
No paywalls. There is no premium tier and there never will be. The whole site is available to the first visitor and the millionth.
No tracking of your files. Analytics sees which page was loaded. It never sees what you typed into a tool or the contents of a file you processed.

How we make money

Honestly: we run ads. That's the whole business model.

ZeroUtil shows Google AdSense ads on most pages. Those ads pay for the domain, the hosting on Cloudflare Pages, analytics, and the hours each week it takes to ship new tools and fix bugs.

We deliberately picked ads over the alternatives:

We don't sell user data. For client-side tools we never receive your files. For the few server-processed tools the file lives in temporary storage for at most 15 minutes and is never opened by a human or a model.
We don't run a freemium or "pro" tier. Every tool is fully functional for everyone.
We don't have a paid newsletter, a Patreon, or a "buy me a coffee" button.

If advertising ever stops making the site viable, we'll figure something else out — and we'll tell you plainly. We won't quietly paywall what used to be free.

What's next

Short-term roadmap, roughly the next few months:

Fill out gaps in the Finance, Home & Lifestyle, and Video & Audio categories.
Better keyboard shortcuts and mobile UX on the most-used tools.
A growing library of short, practical how-to guides — tool-adjacent walkthroughs, not SEO filler.
Improved accessibility (screen-reader labels, keyboard flow, contrast) on older tools.

Recently added

Markdown-to-HTML converter with XSS hardening and a fix for a rare infinite-loop bug on malformed image URLs.
Category icons re-done in Lucide SVGs for sharper rendering at every size.
Contact email moved to [email protected], with a matching footer link.
Layout alignment pass across About, Privacy, Terms, FAQ, and Testimonials sections.

How to contact us

If a tool is broken, if something is missing, if you spot a bug, or if you have a tool idea — send us a message or email [email protected]. Every message is read by the editorial team.