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web_harvester
Scrapers stop after one grab. This one keeps watching.
Most scrapers extract once and quit. web_harvester is a no-code Chrome extension + Python CLI that keeps running on your schedule and tells you what changed. Pick a page, tick the fields (no code, it finds them), leave it on. It pings you only when something moves: price drop, back in stock, new listing, rank or review shift, via Slack, Discord, or email. Data lands in Sheets/CSV/Excel/SQL, stacked by date. Public data, your own session, robots respected, no CAPTCHA or proxy evasion.
Hi PH, solo maker here. The value was never in scraping a page once, it was in being told the second something changed.
I built this because I was tired of re-checking competitor and supplier pages by hand every morning, and because every scraper I tried gave me one snapshot and called it done. So web_harvester is built around the diff: set a recipe once (URL + fields), leave it on, and it only pings you when something moves.
Under the hood a small recon engine sizes up each site across a few modes (JSON-LD, embedded JSON, repeating DOM) and auto-picks an extraction strategy, which is also what makes no-code field discovery work: it already knows where the values are, so you just tick the ones you want. SSR/JSON pages go server-side; dynamic or logged-in pages run inside your own real Chrome session, using your own cookies. I never store credentials or auto-log-in.
It is deliberately scoped: public data, your own access, low frequency, robots respected, no CAPTCHA or proxy evasion, by design.
Free on the Chrome Web Store (Basic: harvest, field-discovery, CSV/Sheets export):
https://chromewebstore.google.co...
Honest feedback very welcome. I will keep building in public.
About web_harvester on Product Hunt
“Scrapers stop after one grab. This one keeps watching.”
web_harvester was submitted on Product Hunt and earned 3 upvotes and 2 comments, placing #158 on the daily leaderboard. Most scrapers extract once and quit. web_harvester is a no-code Chrome extension + Python CLI that keeps running on your schedule and tells you what changed. Pick a page, tick the fields (no code, it finds them), leave it on. It pings you only when something moves: price drop, back in stock, new listing, rank or review shift, via Slack, Discord, or email. Data lands in Sheets/CSV/Excel/SQL, stacked by date. Public data, your own session, robots respected, no CAPTCHA or proxy evasion.
On the analytics side, web_harvester competes within Chrome Extensions and Productivity — topics that collectively have 708.4k followers on Product Hunt. The dashboard above tracks how web_harvester performed against the three products that launched closest to it on the same day.
Who hunted web_harvester?
web_harvester was hunted by Paul Oh. 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 web_harvester including community comment highlights and product details, visit the product overview.
Paul Oh