01
Zero watermarks
Automated removal of hidden Unicode tracking tags, zero-width characters, bidirectional controls, and markdown junk. Includes the Unicode Tags block, which can hide an entire fingerprint in text that looks clean.
The AI Brand Governance Protocol
Ship AI text that reads like you wrote it.
Language models quietly add machine clutter to everything they write: hidden zero-width tracking characters, invisible Unicode tag payloads, leftover reasoning blocks and assistant chatter, and formatting that gives the game away. zeromark.ai removes all of it before your words reach a customer, and never touches your sentences.
Runs entirely in your browser. Nothing is uploaded, stored, or logged.
Free web cleaner
Paste anything a model wrote. The report below tells you what was hiding in it.
Nothing to clean yet. Paste some text, or load the sample.
Detection report
Where the hidden characters were
Preview shows the first markers only. The counts above cover the whole text.
Four kinds of zero
Governance is not one filter. It is four independent guarantees, each with its own failure mode.
02
Zero hallucinations
Grounding verification, link checking, and claim validation against the sources you trust. A citation that points nowhere is caught before publication, not after a customer follows it.
03
Zero machine slop
Removal of everything the model added around your text: reasoning blocks, scaffolding tags, greetings, sign-offs, dangling citation markers. We do not swap your words. Replacing every delve with examine breaks grammar and tone, so wording stays yours.
04
Zero injection risk
Security filters that detect indirect prompt injection and toxic payload vectors hidden in retrieved documents, before that content reaches your model or your reader.
The product ecosystem
One engine, four surfaces. Start free in the browser and move up only when a workflow demands it.
Free
Web clean app
The client-side tool on this page. Instant parsing, no server cost, complete data privacy because the text never leaves the tab.
Free / Pro
iOS share sheet
A native action extension. Select text anywhere on iPhone, tap Share, then zeromark, and the cleaned version lands on your clipboard.
Free
Browser extension
On Firefox now, with Chrome to follow. Right-click a selection on any page and it is cleaned where it sits, or open the side panel and paste. The same six rule groups as the web tool, and no network code, so nothing is uploaded.
Enterprise
B2B governance API
A low-latency middleware proxy that pairs AWS Bedrock Guardrails with your own tone, schema, and compliance rules. OpenAI-compatible, so it drops into an existing pipeline.
Browser extension
Clean text where you write it
The same engine as the cleaner above, running as a browser extension. Right-click a selection on any page, or press Alt+Shift+Z, and the text is cleaned in place. The extension contains no network code at all, so there is nothing that could upload your text.
In place, on any page
Right-click a selection, or right-click inside a text box with nothing selected to clean the whole field. Editable text is rewritten where it sits and your undo history still works, so one Ctrl+Z brings the original back exactly.
A side panel, not a popup
The toolbar button opens a panel that stays open while you write and while you switch tabs, so you can paste and compare against the page instead of losing the panel the moment you click away.
It shows its work
Every clean reports how many edits it made, and the panel names each hidden character it found by codepoint, so you can audit the change instead of trusting it. All six rule groups are yours to switch off.
No access to any site
The cleaner is injected into the current tab only after you invoke it, which is why installing it asks for no permission to read or change any website. No server, no account, no analytics.
Get it for your browserFree
- FirefoxFirefox Add-onsRequires Firefox 140 or newerAdd to Firefox
- ChromeChrome Web StoreComing soon
The Chrome listing is not published yet. It is one extension built for both browsers, so whichever store is live gives you the same thing. Leave an address and we will write the day Chrome goes live. Join the waitlist
Early access
Pro and the governance API are in active development. Leave an address and we will write once, when the tier you picked opens.
Join the waitlist