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CobaltPDF
Generate pixel-perfect PDFs from HTML in any .NET app
CobaltPDF turns HTML, CSS and JavaScript into pixel-perfect PDFs from anyNET app. It drives a real Chromium engine via Playwright, so your PDF matches the browser exactly — flexbox, grid, web fonts and JS-rendered charts all included. One NuGet package, browser pooling for concurrent load, no native print drivers to babysit. Free unlimited evaluation.
Hi Product Hunt 👋
I'm James, the developer behind CobaltPDF.
I built it out of frustration. Every .NET HTML-to-PDF library I tried had the same problem: modern CSS rendered badly, JavaScript got ignored, or I had to babysit a pile of native print drivers just to get a clean page out. Generating a PDF that actually matched what I saw in the browser was way harder than it should be.
CobaltPDF takes a different route: it drives a real Chromium engine via Playwright, so your PDF matches Chrome exactly: flexbox, grid, web fonts, JS-rendered charts, all of it. You add one NuGet package and call it from C#. No print drivers, no surprises.
What it does well:
- Pixel-accurate rendering of real-world HTML/CSS/JS
- Headers, footers, page numbers, custom page sizes
- Browser pooling, so it handles concurrent requests cleanly under load
- Works in web apps, APIs and background jobs
It's a commercial library with free unlimited evaluation, so you can try it properly before deciding. I'd genuinely love feedback from other .NET devs, what's missing, what would make it a no-brainer for your stack. Happy to answer anything here.
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About CobaltPDF on Product Hunt
“Generate pixel-perfect PDFs from HTML in any .NET app”
CobaltPDF was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #84 on the daily leaderboard. CobaltPDF turns HTML, CSS and JavaScript into pixel-perfect PDFs from anyNET app. It drives a real Chromium engine via Playwright, so your PDF matches the browser exactly — flexbox, grid, web fonts and JS-rendered charts all included. One NuGet package, browser pooling for concurrent load, no native print drivers to babysit. Free unlimited evaluation.
CobaltPDF was featured in Developer Tools (514k followers), GitHub (41.3k followers) and Tech (625.6k followers) on Product Hunt. Together, these topics include over 259.5k products, making this a competitive space to launch in.
Who hunted CobaltPDF?
CobaltPDF was hunted by James Hanson. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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James Hanson