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plenz
ai prompt refiner
plenz is an open-source browser extension that acts as a real-time co-pilot for AI prompts. It helps you write better, more effective prompts by providing inline suggestions and one-click refinements. Built with a privacy-first, BYOK (Bring Your Own Key) model, it works across major AI chat platforms like ChatGPT, Claude, and Gemini.
Top comment
Hey Product Hunt 👋, I built plenz because I kept seeing the same pattern in AI workflows: the model was getting blamed for weak output when the real issue was usually a vague prompt upstream. plenz helps improve prompts inline before you hit send, inside the workflow people already use. The goal is simple: better first-pass output without pushing users into a separate prompt editor. What makes it different: - inline prompt refinement - open source - BYOK and provider choice - privacy-first setup without a required central plenz prompt-processing backend I would especially love feedback on: 1. whether the inline suggestion flow feels genuinely helpful 2. whether setup is clear enough for a first-time user 3. which platform or provider we should prioritize next Happy to answer anything and ship fixes based on feedback.
About plenz on Product Hunt
“ai prompt refiner”
plenz was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #140 on the daily leaderboard. plenz is an open-source browser extension that acts as a real-time co-pilot for AI prompts. It helps you write better, more effective prompts by providing inline suggestions and one-click refinements. Built with a privacy-first, BYOK (Bring Your Own Key) model, it works across major AI chat platforms like ChatGPT, Claude, and Gemini.
On the analytics side, plenz competes within Chrome Extensions, Productivity, Open Source, Privacy and GitHub — topics that collectively have 823.8k followers on Product Hunt. The dashboard above tracks how plenz performed against the three products that launched closest to it on the same day.
Who hunted plenz?
plenz was hunted by Siddhant Singh. 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.
For a complete overview of plenz including community comment highlights and product details, visit the product overview.