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Hardin FIlter
Catch AI hallucinations before you trust the answer
Hardin Filter checks AI answers from ChatGPT, Claude, Gemini, and Copilot for what actually matters: fabricated citations, references that don't exist, numbers that don't add up, contradictions, leaked data, and outdated info presented as current. Every check produces a signed, verifiable receipt (via our partners at TBN Protocol) — proof of what was checked, not just a green tick. Chrome extension, VS Code extension, or paste-in web tool. Free, no account needed.
Hey everyone 👋
I built Hardin Filter because I kept seeing AI answers that sounded completely confident but were quietly wrong — a made-up source, a package that doesn't exist, numbers that didn't add up. Once you start looking for it, it's everywhere, and there was no easy way to catch it in the moment.
The approach that stuck was: don't try to make the AI smarter, just check what it actually said. Hardin Filter runs each answer through a set of checks for fabricated references, numeric consistency, contradictions within the same answer, leaked data, and staleness — then gives you a signed, verifiable receipt instead of a plain pass/fail you have to trust.
It started as a Chrome extension, but pretty quickly it was obvious people needed it in more places — so a VS Code extension and a paste-in web tool came next (the web tool also covers anyone on mobile or using an app instead of a browser). A Safari version is built and ready, just waiting on a Mac-owning volunteer to help test it — if that's you, there's a link on the site.
Would love feedback, especially on where the checks feel too strict, too lenient, or miss something you'd want caught.
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About Hardin FIlter on Product Hunt
“Catch AI hallucinations before you trust the answer”
Hardin FIlter was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #27 on the daily leaderboard. Hardin Filter checks AI answers from ChatGPT, Claude, Gemini, and Copilot for what actually matters: fabricated citations, references that don't exist, numbers that don't add up, contradictions, leaked data, and outdated info presented as current. Every check produces a signed, verifiable receipt (via our partners at TBN Protocol) — proof of what was checked, not just a green tick. Chrome extension, VS Code extension, or paste-in web tool. Free, no account needed.
Hardin FIlter was featured in Artificial Intelligence (474.3k followers) on Product Hunt. Together, these topics include over 108.7k products, making this a competitive space to launch in.
Who hunted Hardin FIlter?
Hardin FIlter was hunted by Burhan Yanbolu. 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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Burhan Yanbolu