Hide what shouldn't be shared, before you share it.
Nixel finds API keys, card numbers, emails and personal details on any page
and covers them up. Then you screen-share, screenshot or record
without thinking about it.
Add to Chrome
Free for seven days, then $29 a year. No card to start,
no account, nothing to configure.
Hello Vlad Morozov, your statement is attached.
A copy went to v.morozov@fastmail.com and we
will call +7 916 402 55 18 if anything needs
your attention.
Press any mask to look under it. The original never leaves the page.
Everything happens on your device
Nixel does not send the pages you visit anywhere, because there is nowhere to send them. There is no server behind
this product. Detection runs inside your browser, in your own machine's memory.
That is not a promise about how carefully we handle your data. It is a
statement that we never receive it.
What it finds
- API keys, access tokens and AWS credentials
- Card numbers, verified against a checksum and an issuer prefix
- Email addresses and phone numbers
- Internal hostnames and private IP addresses
- People's names, addresses and organisations, found by a language model that
also runs on your device
The popup tells you what it found, and one tap stops it hiding any kind you
don't care about.
The screenshot you were about to send
Right now you crop it, or you smudge it in Preview, or you look at it twice
and send it anyway. All three depend on you spotting the thing you are trying
not to send.
Nixel captures the page and opens an editor with every finding already
covered. You review what it caught rather than hunt for what you missed.
Toggle any of them, pick how a mask looks, then copy or save a PNG that is
safe to paste into Slack, a ticket or a reply.
Privacy policy
Last updated: 20 August 2026
Nixel is a browser extension published by SD Software LLC (Armenia).
This policy describes exactly what the extension does with data.
What we collect
Nothing. We operate no servers and receive no data from the extension.
We cannot see the pages you visit, what Nixel found on them, or that you use it
at all. There is no analytics, no telemetry and no crash reporting.
What stays on your device
- Page content. Read in your browser to find sensitive text, and
never transmitted. It is not written to disk or kept after the page closes.
- Your settings. Which kinds to hide, how masks look, which sites are
switched off. Stored locally by your browser.
- Screenshots. A capture passes through your browser's temporary
storage on its way to the editor and is deleted the moment the editor has
it. Nothing is uploaded, and the redacted PNG is saved only where you
put it.
Network requests the extension makes
Two, and only these:
Downloading the detection model, once
The optional on-device language model (about 100 MB) is downloaded from the
Hugging Face CDN the first time you enable it, then cached and used offline.
This request contains no information about you or the pages you visit. You
can decline it, remove the model at any time, and the rest of the extension
keeps working.
Checking your licence, once a week
Once you buy a licence, the extension confirms it with Lemon Squeezy, our
payment provider, about once a week. The request contains the licence key
and a device label such as "Nixel on Mac". It never contains page content,
and the extension keeps working for a month if the check cannot be made.
Permissions, and why
Chrome will warn you that Nixel can read and change your data on all
websites. That is accurate, and unavoidable: an extension cannot find a
leaked key on a page without reading the page. What it does with that access
is the whole of this policy. Reading happens in your browser and stops there.
- Access to the pages you open: to find sensitive text and cover it.
- activeTab / scripting: to read and mask the page you are looking at.
- storage: to remember your settings.
- offscreen: to run the detection model without slowing the page down.
Changes and contact
If this policy changes, the date above changes with it. Questions, or a
request about your data:
support@nixel.org.