This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
KeepFacts
Catch exact facts changed or dropped by AI rewrites
KeepFacts compares a trusted source with an AI rewrite, summary, or translation and flags changed, missing, or added exact facts. It runs locally in your browser, needs no account or AI key, and is open source.
Hi Product Hunt — I built KeepFacts around a narrow problem: an AI rewrite can sound polished while quietly changing a date, number, or link.
Traditional diffs show every wording edit. KeepFacts instead extracts exact details from a trusted source and the new draft, then flags items that may have changed, disappeared, or been added. It currently covers common Chinese and English dates, money, percentages, quantities, versions, URLs, emails, standalone numbers, and user-defined must-preserve terms.
Everything runs locally in the browser with deterministic rules. There is no account, AI API key, tracking code, automatic saving, or upload. You can review each warning, add a note or expected fix, copy a confirmed-issues-only fix list, and export a traceable Markdown report.
An important boundary: KeepFacts does not verify whether a claim is true, guarantee that every fact is recognized, or judge whether the full meaning was preserved. It is a focused preflight check with a human review step.
The built-in 30-second example changes September 15 to September 18, changes 100 users to 80, and drops a launch URL. I would value concrete feedback: what exact fact did it miss, or what did it flag unnecessarily?
Source: https://github.com/MasakiNakao/k...
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About KeepFacts on Product Hunt
“Catch exact facts changed or dropped by AI rewrites”
KeepFacts was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #76 on the daily leaderboard. KeepFacts compares a trusted source with an AI rewrite, summary, or translation and flags changed, missing, or added exact facts. It runs locally in your browser, needs no account or AI key, and is open source.
KeepFacts was featured in Open Source (68.8k followers), Writing (59.3k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 55.9k products, making this a competitive space to launch in.
Who hunted KeepFacts?
KeepFacts was hunted by 弗朗西斯卡. 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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