Pinterest Pin Size Checker — Free Dimension & Ratio Check

Why the shape matters more than the pixels

Pinterest's feed is a vertical masonry grid. Every pin competes for vertical space, and a taller pin simply occupies more of the screen than a wide one. That is the whole mechanism — no algorithm mystery required.

A landscape image in that grid is a thin strip. It is the easiest thing in the world to scroll past. Cropping it to 2:3 is usually the single biggest improvement available to a pin, and it takes seconds.

The sizes Pinterest actually wants

Dimensions	Ratio	Verdict
1000 × 1500	2:3	The recommendation. Renders predictably everywhere.
1000 × 2100	10:21	Tall infographics. More space, some truncation risk.
1000 × 1000	1:1	Acceptable. Less vertical presence than 2:3.
600 × 600	1:1	Board covers only.
1080 × 1920	9:16	Video pins.
Anything wider than tall	—	Weakest possible shape on Pinterest.

How wide is wide enough?

1000 pixels is the practical minimum. Below about 600 the image looks soft on high-density phone screens, which is where most Pinterest browsing happens.

Going much above 1000 buys very little — Pinterest re-encodes and resizes on upload — while making your file larger for no visible gain. 1000 × 1500 is the sweet spot precisely because it is the smallest size that looks sharp everywhere.

File size

Pinterest accepts large files, so the upload itself is rarely a problem. The reason to care is your destination page: if you use the same image there, a 12 MB photograph is the heaviest thing on the page and it delays everything else. A pin that sends traffic to a slow page wastes the traffic.

The image compressor will take a typical pin down by half or more with no visible difference.

What this checker reports

Shape verdict — where your ratio sits and what it costs you.
Aspect ratio in simplified form, so 1000 × 1500 reads as 2:3.
Dimensions, with a warning below 1000 pixels wide.
File size, flagged above 10 MB.
The target to crop to.

Nothing is uploaded

The check runs in your browser. The file is read locally, measured, and never transmitted. There is no size limit beyond what your own device can handle, and it works with no connection once the page has loaded.

Fixing a wrong size

The image resizer crops to any Pinterest size in one step, scaling to fill and centre-cropping so nothing is stretched. If your subject sits near an edge, crop it manually first so the important part survives the centre crop.

If you want to see how the result will actually look in a feed, the pin preview renders it at feed-card size with your title truncated exactly as Pinterest will truncate it.

What the checker is telling you

It reads the real pixel dimensions of a file and reports the ratio, whether that ratio displays in full on Pinterest, and how far it is from the 2:3 standard. That answers the three questions people actually have about a pin they are about to upload: is it the right shape, will it be cropped, and is it tall enough to hold a feed column.

The verdicts, and what to do about each

2:3 — nothing to do. This is the target.
Between 2:3 and 1:2.1 — fine. Taller than standard and still shown in full.
Taller than 1:2.1 — the feed will truncate it. Either shorten it, or make sure the top portion works as a complete pin on its own.
Square — displays correctly but occupies less vertical space, so it has less time to stop a scroll. Acceptable for product shots.
Landscape — working against the format. Crop to vertical with the image resizer.
Under about 600 pixels wide — likely to look soft at feed scale. Use a larger source if you have one.

Why a pin can be the right ratio and still look wrong

Dimensions are necessary and not sufficient. A correctly sized pin still fails if:

The subject is small in the frame. At feed scale a distant subject becomes a speck. Crop closer.
The text is sized for a monitor. Shrink the image to 25% — if the type is unreadable there, it is unreadable in the feed.
The image is pale end to end. It merges into the light feed background and has no silhouette.
It is a collage of six things. One idea per pin; a collage becomes noise at thumbnail size.

The pin preview shows the image at feed scale, which catches all four faster than reasoning about it.

Checking a batch before you upload

If you are publishing a set, check the odd ones out rather than every file. Sort by dimensions and look at anything that is not your standard size — those are where the mistakes are. A batch exported from one template is usually consistent; the problems come from images added by hand from another source.

Dimensions on your own website

If people pin from your site, the image dimensions on your pages become the dimensions of pins you did not create. A blog whose images are all 1200 × 630 landscape social cards will generate landscape pins forever.

The usual fix is to include one vertical 2:3 image in each post, positioned where a reader will meet it. Some sites hide a dedicated pinnable image for this purpose; visible works better, because a reader who can see it is the person most likely to pin it.

Local only

Dimensions are read from the file in your browser. Nothing is uploaded and nothing is stored.

Frequently asked questions

What is the best Pinterest pin size?

1000 × 1500 pixels — a 2:3 ratio. It is Pinterest's own recommendation and the smallest size that stays sharp in every placement.

Can I use square images on Pinterest?

Yes, and they work. They simply occupy less vertical space than 2:3, which in a vertical feed means less attention.

What happens if my pin is too long?

Beyond roughly 1:2.1 Pinterest truncates pins in several placements, so the bottom of a very long infographic may never be seen. Keep the key message high in the frame.

Is my image uploaded to check it?

No. The check runs entirely in your browser — the file never leaves your device.

Does image size affect Pinterest reach?

Aspect ratio does, significantly. The feed is a vertical grid, so taller pins occupy more screen space and attract more attention than wide ones.

What size should a Pinterest pin be?

1000 × 1500 pixels — a 2:3 ratio. It fills a feed column and is never cropped.

Will Pinterest crop my pin?

Not up to about 1:2.1. Taller than that and the feed truncates it behind a "see more", so the bottom is rarely seen.

Is my pin too small?

Below roughly 600 pixels wide it will look soft at feed scale. Use a larger source rather than upscaling, which adds pixels but no detail.

Why do pins from my website come out landscape?

Because that is the shape of the images on your pages. Add a vertical 2:3 image to each post so people pinning from your site create vertical pins.

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