Front-end & full-stack developers
They land here mid-task — building a shadow, debugging a regex, formatting a payload. High intent, low patience for anything that gets in the way.
Sponsor the tools
Put your product in front of developers mid-task
128 free developer tools across 12 categories. No sign-up, no paywall, no interstitials. One direct-sold sponsor card per page — and it could be yours.
a single quiet card in a very busy universe
The audience
Who you would be reaching
real numbers, handed over directly
on request
Monthly visitors
Shared from the live dashboard on request
on request
Monthly tool sessions
People actually using a tool, not bouncing
on request
Newsletter subscribers
Opted in for one new tool a week
Traffic figures are shared directly from the analytics dashboard when you get in touch — no inflated public estimates.
Designers who write CSS
The gradient, palette and shadow tools pull in the design side of the house — the people who pick the stack for the visual layer.
Indie hackers & solo builders
Shipping alone, evaluating tools constantly, and buying without a procurement cycle. They try things the same day they hear about them.
Why here
What makes this slot different
one card, one sponsor, no auction
One sponsor, not an auction
A category is sold to a single sponsor for the month. Your card is never rotated against another sponsor's, and there is no bidding for the position.
Category targeting
Book the category your product belongs to. A security product runs on the security tools, not next to a colour picker.
Native, not an iframe
Your card is rendered by the site itself, in the site's own design system. It loads no third-party script, so there is nothing for an ad blocker to strip.
Honest disclosure
Every slot carries a visible "Sponsored" badge and a rel="sponsored" link, per FTC and Google guidance. Good for your SEO and mine.
Placements
Where your card appears
between the answer and the next thing they click
The slot sits after the user has their answer — never before it, never over it, never in a modal. It can be dismissed, and it stays dismissed. Simplified for clarity: a real tool page also carries the units listed in the FAQ below.
| Placement | Where it renders | Tools covered |
|---|---|---|
| CSS & design tools | In-content, below the generator output | 32 |
| Code converters | In-content, below the conversion output | 21 |
| Text & data tools | In-content, below the result panel | 4 |
| Security tools | In-content, below the generator output | 10 |
| Productivity tools | In-content, below the tool output | 48 |
Tool counts come straight from the live tool registry, so they move as new tools ship. Slots are wired into the highest-traffic pages in each category first.
Packages
What it costs
no contracts longer than the deal itself
Single category
Contact for pricing
One placement family, one month.
- Your card on every tool in one category
- Logo, headline, one-line pitch and CTA
- Your accent colour on the card
- Impression + click counts shared monthly
Whole network
Contact for pricing
Every category, every wired tool page.
- All five in-content placement families
- First position ahead of any house promo
- A mention in the weekly newsletter
- Impression + click counts shared monthly
Something else
Contact for pricing
A launch, a sponsored tool, a longer term.
- Multi-month rates
- Sponsor a new tool build end to end
- Co-branded write-up on the blueprint
- Tell me what you have in mind
Current sponsors
Every slot is open
the constellation is waiting for its first star
- Your logo hereCSS & design tools
- Your logo hereCode converters
- Your logo hereText & data tools
- Your logo hereSecurity tools
- Your logo hereProductivity tools
No paid sponsor has run yet — you would be the first, and the page will say so honestly either way.
Questions
Before you email
the things every advertiser asks first
How many sponsors run at once?
One per placement, at most. A category is sold to a single sponsor for the month — your card is not rotated against anyone else's.
Is this slot sold through an ad network?
No. This slot is direct-deal only — you email me, we agree a price, and I add your card in a commit. There is no network, no auction and no behavioural targeting involved in it.
What else is on the page alongside my card?
Being straight with you: tool pages also carry a Carbon Ads unit and an affiliate recommendation card, both labelled "Sponsored". Your card is the only slot sold directly and the only one whose category you choose, but it is not the only commercial thing on the page. If exclusivity matters for your campaign, ask — the other units can be turned off for a sponsored category.
What do you track, and what do I get back?
Impressions and clicks, counted first-party with no cookies or cross-site identifiers. You get both numbers at the end of the month.
Will an ad blocker eat it?
Your card is part of the page, rendered by the same code as everything else, and makes no third-party request — so there is nothing for a blocker to intercept.
Is the link followed?
No. Every sponsor CTA ships rel="sponsored noopener noreferrer", which is what Google asks for. Buy the audience, not the link equity.
What do you not accept?
Anything I would not use myself, anything that needs a user to be tricked, and anything that would make a developer mid-task feel sold to. I will say no and mean it.
Can I see the numbers before committing?
Yes — email me and I will share the analytics dashboard figures directly. Nothing on this page is an estimate, which is why the traffic numbers are not printed here.
How do I get started?
Email xsantcastx@xsantcastx.com with your product and the category you want. I will reply with current traffic, availability and a rate.
Want the slot?
Email me with your product and the category you want. You will get current traffic, what is available, and a price — usually the same day.
or write directly to xsantcastx@xsantcastx.com