You design pins on a big screen, but most people meet them on a phone, in a column a little under half the screen wide, surrounded by other images. Text that looks bold in your editor can turn into a smudge at that size. This tool places your pin in a realistic two-column phone feed so you can judge it in context before you publish.
A second view shows the pin at about the width of a desktop feed column and as a small thumbnail. If the title is still readable there, it will hold up anywhere. The phone and feed are generic mockups, not screenshots of any app, and your image never leaves your browser.
How big a pin really is on a phone
On a typical phone, the home feed shows two columns, so each pin is a little under half the screen wide, around 170 to 190 points. A 1000 pixel wide pin is shrunk to less than a fifth of its size. That is why pin titles need large, heavy letters and only a few words. The preview uses those proportions, and on most laptop screens the phone appears close to its real size.
Images taller than 1:2.1 are cut off at the bottom in the feed, and the preview shows that crop. To check proportions for many images at once, use the aspect ratio checker.
Quick readability fixes
If the title is hard to read, try fewer words in larger type, a solid band of color behind the text, or a darker overlay on the photo. Bold sans and heavy display fonts survive shrinking better than thin script fonts. The pin analyzer checks contrast for you.
To rebuild the design quickly, open the pin maker, which sizes the title to fill its band automatically, or the add text to image editor.