Need the thumbnail of a YouTube video in full HD? Paste the link in the tool above and you get every size YouTube stores, from the tiny 120×90 preview up to 1280×720, as JPG or WebP.

I also built in two things most grabbers skip: a CTR check that scores any thumbnail and shows it in a light and dark YouTube feed, and a resizer for Shorts, 4K, banners and social posts.

How to Download a YouTube Thumbnail

The whole job takes about ten seconds. You only need the video’s link.

1. Copy the video link. On YouTube tap Share, then Copy link. A link from the address bar works too.
2. Paste it into the tool above. Tap Paste (your browser may ask for clipboard permission) or long-press the box and paste.
3. Tap Get thumbnails. The tool shows every size side by side and marks the best one with a green Best badge.
4. Pick a size and format. Tap Download JPG, or WebP for a smaller file with the same look.
5. Optional: open the CTR check or Resize tab. The thumbnail you just loaded is already there.

The tool accepts all common link styles:

• Normal videos: youtube.com/watch?v=VIDEO_ID, also with extra bits like &t=30s or a playlist.
• Short links: youtu.be/VIDEO_ID from the Share button.
• Shorts and live: youtube.com/shorts/VIDEO_ID and youtube.com/live/VIDEO_ID.
• Embeds and YouTube Music: /embed/, youtube-nocookie.com and music.youtube.com links.
• Just the ID: the 11-character code, such as dQw4w9WgXcQ.
• Vimeo: vimeo.com/123456789 and player.vimeo.com/video/123456789.

Tip: the last five videos you looked up appear under Recent. They are saved only in your own browser.

On iPhone, Android and PC

The download button works the same everywhere. Where the file lands depends on your device.

If your browser blocks the direct download, the tool opens the image in a new tab instead and tells you. Saving from that tab gives you the exact same file.

Every YouTube Thumbnail Size and URL

YouTube creates several copies of every thumbnail on its image server, i.ytimg.com. Each has a fixed file name, so you can also build the link yourself.

The pattern is https://i.ytimg.com/vi/VIDEO_ID/FILE_NAME. For WebP, swap /vi/ for /vi_webp/ and .jpg for .webp.

These names match the official YouTube Data API, which lists thumbnails as default, medium, high, standard and maxres. The tool also reads the real pixel size of each file after it loads, so the size it shows is what you actually get.

Note: the 640×480 and 480×360 files are 4:3, so a 16:9 thumbnail inside them has black bars on the top and bottom. For a clean widescreen image pick maxresdefault, hq720 or mqdefault.

Why the HD Thumbnail Is Sometimes Missing

When maxresdefault.jpg does not exist, YouTube does not show an error. It quietly returns a small grey 120×90 placeholder instead.

Most grabbers show you that grey box as if it were real. This tool checks the real size of every image and marks fake ones as Not available.

Common reasons the HD version is missing:

• Low-resolution upload: the video was uploaded below 720p, which is common on older videos.
• Still processing: brand-new uploads can take a while before the HD versions appear.
• Private or deleted video: YouTube removes the images, so every size fails.

In those cases the green Best badge jumps to the largest size that does exist. Need it bigger? An AI upscaler can double it cleanly; see my guide on how to upscale an image with AI.

Shorts and Vimeo Thumbnails

YouTube Shorts

Shorts use the same image server, so the same sizes work. Most of those files are 16:9 crops of the vertical video.

Some Shorts also have a vertical frame. When it exists, the tool shows it first as Shorts vertical. When it does not, that card is simply hidden.

Note: YouTube’s feed may show a different cover for a Short than these files, because custom Shorts covers are chosen in YouTube Studio. You get what YouTube’s image server stores.

Vimeo

For Vimeo links the tool asks Vimeo’s public oEmbed service for the video’s thumbnail. It then requests 1920, 1280, 640 and 295 pixel wide versions and hides any size Vimeo does not return.

Private videos and videos whose owner blocked embedding do not share a thumbnail. The tool tells you when that happens.

Get a Thumbnail Without Any Tool

Method 1: Build the URL by hand

1. Find the video ID. It is the 11 characters after v=, after youtu.be/ or after /shorts/.
2. Put it in the pattern. https://i.ytimg.com/vi/VIDEO_ID/maxresdefault.jpg
3. Open it and save. If you see a small grey box, change maxresdefault to hqdefault.

Method 2: yt-dlp (command line)

If you already use the free yt-dlp downloader, it can save the thumbnail without the video. Run yt-dlp --skip-download --write-thumbnail URL.

• See every size: yt-dlp --list-thumbnails URL
• Get a JPG instead of WebP: add --convert-thumbnails jpg (needs FFmpeg installed).
• Whole playlist: pass the playlist URL instead of a video URL.

Method 3: YouTube Data API (for developers)

The videos.list endpoint returns a snippet.thumbnails object with every size and its width and height. You need a free API key from Google Cloud.

import requests

API_KEY = "YOUR_API_KEY"
video_id = "dQw4w9WgXcQ"
r = requests.get(
    "https://www.googleapis.com/youtube/v3/videos",
    params={"part": "snippet", "id": video_id, "key": API_KEY},
)
thumbs = r.json()["items"][0]["snippet"]["thumbnails"]
best = thumbs.get("maxres") or thumbs.get("standard") or thumbs["high"]
print(best["url"], best["width"], best["height"])

A videos.list call costs 1 unit of the default 10,000-unit daily quota, so this is fine for thousands of lookups a day.

How the CTR Check Works

The CTR check looks at the actual pixels of a thumbnail in your browser. It scores six visual basics that decide whether a thumbnail even gets noticed on a small phone screen.

Below the score you get the five dominant colours and a feed preview. Type your title and you see the thumbnail at home-feed size and at the small “Up next” size, in light and dark mode.

Quick answer: the score checks visual basics only. It cannot judge your topic, your title or your audience, so use it to compare your own versions, not to predict views.

Get a deeper AI review

The check also writes a ready-made prompt that includes your scores. Copy it, open ChatGPT, Claude or Gemini, attach your thumbnail and paste.

The AI then rates your thumbnail on the things pixels cannot measure: what a viewer understands in one second, emotion, text, and how well it pairs with your title. For more on predicting performance, read my comparison of YouTube virality predictor tools.

Tip: run your thumbnail and two alternatives through the check, keep the best two, then let YouTube Studio’s built-in A/B test pick the winner with real viewers.

Want to see your thumbnail next to the actual videos you compete with? Paste their links into my free YouTube thumbnail tester and compare up to three versions in a realistic home, search and Up next feed.

YouTube’s Custom Thumbnail Rules (2026)

If you resize a thumbnail to upload on your own channel, these are YouTube’s current requirements from its help page.

Warning: if a vertical video has a 16:9 custom thumbnail, YouTube replaces it with an auto-generated 4:5 crop on the home, Explore and Subscriptions pages. Upload a 9:16 version for vertical videos.

Need ideas for what to put on it? My YouTube thumbnail ideas guide has proven layouts plus a Claude Skill that brainstorms concepts for you.

Resize a Thumbnail for Shorts, 4K and Social

The Resize tab works on the thumbnail you loaded or on any image you choose from your device.

1. Pick a preset or choose Custom and type a width and height.
2. Pick how it fits. See the table below.
3. Pick a format. JPG for YouTube uploads, PNG for sharp text, WebP for websites.
4. Tap Resize and download. The tool shows the final size in KB or MB and warns you if it is over YouTube’s 2 MB mobile limit.

Presets include YouTube 1280×720, Full HD, 4K, Shorts 1080×1920, channel banner 2560×1440, square 1080×1080, Instagram portrait 1080×1350, X and LinkedIn 1600×900, and a 1200×630 link preview.

Note: making an image bigger than its source does not add real detail. A 1280×720 thumbnail resized to 4K will look soft; use an AI upscaler for that.

Repurposing a long video into Shorts as well? My guide to repurposing a YouTube video into Shorts and Reels covers the full workflow.

Can You Reuse Someone’s Thumbnail?

Downloading a thumbnail is easy and allowed for personal use, but the image still belongs to the creator. Before you reuse one, check the purpose.

• Usually fine: saving your own thumbnails, studying designs for inspiration, keeping a mood board.
• Often fine with credit: commentary, reviews, news or teaching, where the thumbnail is the thing you discuss. Fair use rules differ by country.
• Not fine: uploading someone else’s thumbnail on your video, or selling it.

Warning: using another creator’s thumbnail on your own upload can get the video removed for copyright or impersonation. This is general information, not legal advice.

Troubleshooting

FAQ

How do I download a YouTube thumbnail in HD?

Paste the video link into the tool above and tap Download JPG on the maxresdefault card. It is 1280×720 when the video was uploaded in HD.

Can I download a YouTube thumbnail in 4K?

No. YouTube’s public image server stores thumbnails up to 1280×720, even if the creator uploaded a 4K image. You can resize to 3840×2160 in the Resize tab, but it will not gain real detail.

Is downloading YouTube thumbnails legal?

Saving them for personal use, study or inspiration is generally fine. Reusing them on your own videos or selling them can break copyright, because the image belongs to the creator.

Does this work for YouTube Shorts?

Yes. Paste the Shorts link and you get every size, plus a vertical frame when YouTube has one for that Short.

Why is the downloaded thumbnail a WebP file?

Only if you tapped the WebP button. The Download JPG button always gives a .jpg file, which opens everywhere.

Do you store my links or images?

No. The tool runs in your browser, and images load straight from YouTube or Vimeo. Your last five lookups are saved only in your own browser.

Can the CTR check predict views?

No. It checks visual basics like contrast and clutter. Use it to compare your own versions, and use YouTube’s A/B test for the final pick.

Where do I find the video ID?

It is the 11 characters after v= in a normal link, after youtu.be/ in a short link, or after /shorts/ in a Shorts link.

Final Thoughts

Grabbing a thumbnail should take one paste and one tap, and now it does. The real value is what comes next: checking your own thumbnail before it goes live and turning it into every size you need.

Bookmark this page for your next upload. For the rest of your packaging, see my guides on YouTube SEO titles, descriptions and tags and the YouTube script writer skill.

Sources

• YouTube Help: Video thumbnails (sizes, 2 MB mobile and 50 MB desktop limits, verification, Shorts on computer only, 4:5 replacement)
• YouTube Data API: Thumbnails resource (default, medium, high, standard, maxres)
• YouTube Data API: videos.list (snippet.thumbnails, quota cost)
• Vimeo oEmbed API (thumbnail_url for public videos)
• yt-dlp on GitHub (thumbnail options)