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GridSim
See any website's grid, right on the live page.
GridSim drops a column (x) and baseline (y) grid onto any live website, so you can see what lines up and what drifts. The best part: a bookmarklet (Safari and Chrome) you drag to your bar once, then click on any site to overlay the grid in-page, with live column and gutter controls. You can also paste a URL, check it in a real iPhone or Android frame, compare two devices, and take the grid into Figma as an overlay or grab the CSS. Free, no sign-up.
Hey Product Hunt 👋 I'm Wilfredo, I run Studio Practice (same shop as MacSim and CyberRuler).
Paste any URL and it drops a column (x) and baseline (y) grid right on the live page. Check it on desktop or inside a real iPhone or Android frame, set two phones side by side to compare, then pull the grid into Figma or Sketch as a transparent overlay (or grab the CSS).
The part I reach for most: the bookmarklet (Safari and Chrome). Drag it to your bar once, then click it on any site you're already looking at and the grid drops in-page, with live column and gutter controls. No pasting URLs, no leaving the page you're on.
It's free, no sign-up. Would love to hear what you'd check with it, and what it should do next.
About GridSim on Product Hunt
“See any website's grid, right on the live page.”
GridSim was submitted on Product Hunt and earned 6 upvotes and 1 comments, placing #111 on the daily leaderboard. GridSim drops a column (x) and baseline (y) grid onto any live website, so you can see what lines up and what drifts. The best part: a bookmarklet (Safari and Chrome) you drag to your bar once, then click on any site to overlay the grid in-page, with live column and gutter controls. You can also paste a URL, check it in a real iPhone or Android frame, compare two devices, and take the grid into Figma as an overlay or grab the CSS. Free, no sign-up.
On the analytics side, GridSim competes within Design Tools, Developer Tools, Web Design and Vercel Day — topics that collectively have 784.5k followers on Product Hunt. The dashboard above tracks how GridSim performed against the three products that launched closest to it on the same day.
Who hunted GridSim?
GridSim was hunted by wilfredo. 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 GridSim including community comment highlights and product details, visit the product overview.
wilfredo