Pinterest® Research · Pinfluence Discover
Does Pinterest® Alt Text Length or Keywords Affect Your Ranking?
By Pinfluencing.com · Last updated
Length does not move ranking. The right keyword does.
Almost every Pinterest® pin already has alt text, because Pinterest writes it automatically. So the real questions are about the alt text you can shape: its length and its words.
In our look at tens of millions of pins, length made no difference to ranking at all. One thing that did matter was relevance: alt text that contained the search keyword ranked about 6 positions better, in every follower size. Keywords are not the only thing that affects ranking, but they are one lever you control.
Find the words worth putting in your alt text.
Length does not move the needle, but the right keyword does. Pinfluence Discover shows you the exact phrases people search in your niche, so your titles, descriptions, and alt text name what people are looking for. Free to start, no credit card.
Find Your Keywords FreeKey findings
- Nearly every pin already has alt text. Among pins we have full details on, 99.6% already had alt text, because Pinterest auto-generates it. That is why this study focuses on the two things you can actually shape, its length and its words, not whether it exists.
- Length does not move ranking. From short alt text to long, every length group sits at roughly the same average position (between about 47 and 48), and that stays true inside every follower group. There is no payoff for writing more.
- Relevant keywords are the lever you can shape. Alt text that contains the search keyword ranked about 6 positions better (42.2 versus 48.2), and that lift held across every follower size. Ranking has many inputs, but among the things you control in alt text, the words are what moved it.
- Do not trust the ‘alt text makes pins rank higher’ claim. Split pins into ‘has alt text’ and ‘no alt text’ and the first group looks far ahead, but the ‘no alt text’ group is almost entirely pins we do not have full details on. That gap is a data artifact, not a real alt-text effect.
- On the famous ‘+123%’ claim. Tailwind, a Pinterest scheduling tool, is widely cited for a 123% lift in outbound clicks from alt text. We cannot confirm or refute that, because we measured search ranking, not clicks. It is a different question.
What this means for you
Two simple takeaways. First, do not spend energy making sure each pin ‘has’ alt text. Pinterest already fills it in for nearly every pin, so that box is almost always checked for you.
Second, do not pad your alt text to make it longer, because length does nothing for ranking in our data. What is worth your attention is the wording.
When you write or edit your own alt text, make it describe what the image actually shows, using the plain words people would type into search. That is the same lesson that runs through all of our research.
The lever is the keyword being present where it counts, which we lay out in full in our piece on where to put your keyword on Pinterest, not the length of any one field or the simple fact that it is filled in. A short, relevant line of alt text beats a long, vague one.
First, almost every pin already has alt text
This is the fact that shapes everything else, so it is worth stating up front. Once you look only at pins Pinterest fully serves, alt text is nearly everywhere.
| Group of pins | Share with alt text |
|---|---|
| Pins we have full details on | 99.6% |
| Pins we have full details on, but missing alt text | 0.4% |
Pinterest auto-generates alt text for essentially every pin, so there is almost no ‘without’ group to compare against. That is why the old question of whether having alt text helps is the wrong one. There is no meaningful population of real pins that go without it.
It is also why you should be careful with a claim you will see repeated often, that pins with alt text rank far higher than pins without. If you split all pins that way, the ‘has alt text’ group does look far ahead.
That gap is not alt text working its magic, though. It is the roughly one in four pins we do not have full details on landing in the ‘no alt text’ pile, and those pins rank worse for reasons that have nothing to do with alt text. With presence settled, the two questions left are the ones you can actually act on: does length matter, and do the words matter?
Does alt text length matter?
No. We grouped pins by how long their alt text was, looking only at pins that actually have it, and ranking is flat across the board.
| Alt text length (characters) | Average position |
|---|---|
| 1 to 25 | 47.4 |
| 26 to 50 | 47.8 |
| 51 to 100 | 47.7 |
| 101 to 200 | 47.1 |
| 200 or more | 48.1 |
Every length group sits within about a position of the others, with no rising or falling trend. A 20-character line and a 200-character paragraph land in essentially the same place.
We checked this inside each follower group too, and the picture is the same flat line (with one barely-there hint that longer alt text helps large accounts a touch, too small to build a rule on). There is no dose-response here, so writing longer alt text shows no ranking payoff.
Do the keywords in your alt text matter?
Yes, this is the part of alt text that tracks with better positions. It is not whether alt text exists or how long it is, it is whether the alt text contains the words people are actually searching for. Keywords are one of several things that affect ranking, and they are the part of alt text worth your attention.
We measured this in our keyword placement study, and the lift holds across follower sizes.
| Account size | With keyword in alt text | Without | Difference |
|---|---|---|---|
| Under 1,000 followers | 42.8 | 48.3 | 5.5 spots better |
| 1,000 to 10,000 | 42.5 | 48.8 | 6.3 spots better |
| Over 10,000 | 41.1 | 47.7 | 6.6 spots better |
Alt text that is relevant to the search ranks about 6 positions better, consistently in every group. Unlike the length numbers, this is a real and steady signal, and it survives the same follower-size check that the presence claim and the hashtag claim both failed.
Notice that it is about the content of the alt text, not the simple fact of having it. So the move is not to add alt text or to make it longer. It is to make sure the alt text Pinterest is showing actually names what the pin is about, in searchable terms.
Make your alt text say what people search.
Pinfluence Discover hands you the real search phrases in your niche and the top-ranking pins using them, so you can write alt text (and titles and descriptions) that actually match. Free daily searches, no credit card.
Show Me the KeywordsHow we did this
This study uses the Pinfluencing.com research index, which organizes public information from Pinterest® search results.
We used data we indexed across late May and early June 2026, ending with a snapshot on June 12. It covers 127,738,297 pin appearances, drawn from about 1.3 million searches across 55,998,390 unique pins. Each row records where a pin ranked for a given search, where 1 is the top.
- Two-stage collection. The first pass records where each pin ranks. A second pass fills in details like alt text, description, and follower count. A plain ‘has alt versus no alt’ comparison is misleading because the ‘no alt’ group is mostly pins we do not have full details on, not creators who removed their alt text.
- Alt text is mostly written by Pinterest. Pinterest auto-generates alt text for nearly every pin, which is why it is present 99.6% of the time among pins we fully detailed. That near-universal coverage is why its presence carries no signal, and why we focus on length and keywords instead.
- Length was measured over pins that have alt text. The small group with none is the data gap above, not creators writing short alt text.
- The keyword numbers come from our keyword placement study, using the same week of data. A field counts as containing the keyword when every word of the search appears in it as a whole word, in any order.
- We have no click data. That is why the widely-cited 123% clicks claim is something we cannot test here. This study is about search ranking, and it shows a connection, not a cause: the default logged-out view, roughly the first 100 results per search, search position only.
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Every keyword finding here came from the Pinfluence Discover index. Point it at your own topics to find the phrases people search and the pins already winning on them. Free daily searches, no credit card.
Try Pinfluence Discover FreeFrequently asked questions
Does alt text length affect Pinterest ranking?
No. Alt text length showed no ranking relationship in our data. Every length, from short to long, sat at about the same average position, in every follower group. Writing longer alt text gives no ranking payoff.
Do keywords in alt text help Pinterest ranking?
Yes. Alt text that contains the search keyword ranked about 6 positions better, and that lift held across every follower size. Relevance is what matters, not length.
Do I need to write my own alt text on Pinterest?
You do not need to add it, since Pinterest fills it in for nearly every pin. It is worth editing when you can make the alt text clearly describe the image using the words people search for, because relevant alt text ranks better.
Does Tailwind’s 123% alt text claim hold up?
That claim is about outbound clicks, and we measured search ranking, so we cannot confirm or refute it. It is a different question from the one our data answers, and we do not have engagement data to test it.
Does having alt text make a pin rank higher?
Not in the way it appears. Nearly every pin already has alt text, so there is almost no ‘without’ group of real pins to compare against. The dramatic gap you see in a naive comparison comes from pins we do not have full details on, not from alt text itself.
What should I put in Pinterest alt text?
A plain description of what the image shows, written with the words people would actually search for. Relevance is what tracks better ranking, not length or simply having the field filled.
About the data and Pinfluence Discover
Every number here comes from the Pinfluencing.com research index of public Pinterest® search results, indexed across late May and early June 2026 (snapshot dated June 12).
Since relevance is what matters, the useful work is finding the phrases people search for in your niche and making sure your titles, descriptions, and alt text reflect them. Pinfluence Discover is built for that, with a free plan that includes daily keyword searches, no credit card needed.
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