YouTube thumbnail resizer that nails 1280×720 every time

Thumbnail Size Guide 2026

Thumbnail size, explained: every platform, every pixel

Thumbnail size is the first thing your audience sees — and the easiest thing to get wrong. Upload an image with the wrong thumbnail size and YouTube, Instagram, or Facebook will crop it, stretch it, or reject it outright. This guide covers the exact thumbnail size for YouTube (1280×720), Roblox (1920×1080), Instagram posts and stories, Facebook covers, LinkedIn banners, and the most-searched banner sizes for Discord, X (Twitter), Twitch, and Etsy in 2026. Every size below is a live preset in our free converter: pick a size and download a pixel-perfect file in seconds.

What is the YouTube thumbnail size?

The YouTube thumbnail size is 1280×720 pixels — a 16:9 widescreen image. YouTube accepts a minimum width of 640 pixels and a maximum file size of 2 MB, and works best with JPG, PNG, or WEBP files. If you have ever wondered “what is the YouTube thumbnail size” after an upload was rejected, those three numbers — 1280×720, 640 minimum, 2 MB maximum — are the whole answer. In short, what is youtube thumbnail size? A 1280×720 JPG, PNG, or WEBP under 2 MB. The classic yt thumbnail size looks sharp in search results, suggested videos, and embeds because 720p is exactly half of 1080p Full HD, so it scales cleanly on every screen. Our free YouTube thumbnail size converter above is pre-set to the thumbnail size YouTube recommends: upload one image or a batch of twenty, choose Fill to crop edge-to-edge or Fit to keep the whole photo, and enable the 2 MB optimizer to guarantee YouTube accepts the file. Every YouTube thumbnail also gets a live preview with safe-area guides, so titles and timestamps never cover faces or text.

YouTube banner size, dimensions, and safe areas

The YouTube banner size is 2560×1440 pixels, but what matters more is the safe area: only the center 1546×423 pixels shows on all devices — TVs display the full image, desktops crop the sides, and phones crop even more. So when people ask "what is the youtube banner size" or "what is the youtube banner size for all devices", the honest answer is two numbers: upload at the full YouTube banner dimensions of 2560×1440, and keep logos, faces, and taglines inside 1546×423. A great YouTube banner background is usually simple — a gradient, a blurred photo, or flat brand colors — because channel art sits behind your avatar, channel name, and subscribe button. Our resizer’s YouTube channel banner size preset exports exactly 2560×1440, and Fill mode centers your design so the safe zone survives every crop. Avoid small text at the edges — big and central nails the yt banner size everywhere.

Roblox thumbnail size

The Roblox thumbnail size is 1920×1080 pixels (16:9) for game gallery images, with an accepted minimum of 768×432. Roblox game icons are a separate asset at 512×512 pixels square — design them to read at 150×150, because that is how small they appear in feeds. A sharp Roblox thumbnail pairs high-contrast art with almost no text, since players decide in a fraction of a second. Upload up to ten gallery images per experience and keep each file lean so pages load fast. Our Roblox thumbnail size preset exports exactly 1920×1080 in PNG or JPG, ready for the Creator Hub.

Instagram post size and story size (2025–2026)

The standard Instagram post size is 1080×1080 pixels — a perfect 1:1 square. Searches for "what is instagram post size", "instagram post size 2025", or "instagram post size 2026" all land on the same answer: still 1080 wide, though Instagram now also showcases portrait posts at 1080×1350 and landscape at 1080×566. The new Instagram post size debate of recent years was only about grid display (taller previews), not uploads: square 1080×1080 still works everywhere. For ephemeral content, the Instagram story size is 1080×1920 pixels — full 9:16 vertical, the same canvas as Reels covers. So what is instagram story size? A 1080×1920 vertical — and the rule that matters is keeping faces and captions inside the center, because the reply bar, username, and call-to-action buttons cover the top and bottom edges. Our presets export both sizes exactly, with Fill mode keeping your subject centered automatically.

Facebook cover size, photo size, and event banners

The Facebook cover size for pages and profiles is 851×315 pixels — upload as sRGB JPG under 100 KB for the fastest load, or PNG for text-heavy designs. The classic Facebook cover photo size headache is the mobile crop: phones show 640×360 while desktops show 820×312, and your profile picture overlaps the bottom-left corner. The fix is a centered safe zone with quiet edges. For gatherings, the Facebook event banner size is 1920×1005 pixels — the largest Facebook canvas — with the event title overlaying the bottom-left in feed previews, so keep that corner clean. Our Facebook banner size presets cover both the 851×315 cover and the 1920×1005 event, so one tool handles your whole page.

LinkedIn cover photo and banner sizes

The LinkedIn cover photo size for personal profiles is 1584×396 pixels — a wide 4:1 background behind your headshot. The matching LinkedIn banner size for company pages is 1128×191 pixels. Because your profile photo overlaps the bottom-left of the personal banner, keep that corner clean and put your headline value — role, proof, call to action — in the center-right. Export as JPG for photos or PNG for crisp text. Every LinkedIn cover image size above is a preset here, so you never have to memorize the numbers.

More banner sizes: Discord, X (Twitter), Twitch, Etsy

Every network has its own banner size, and uploading the wrong one means blurry upscales or brutal crops. The Discord banner size for profiles is 600×240 pixels (5:2, Nitro required), while Discord server banners use 960×540. The Twitter banner size — now X header size — is 1500×500 pixels (3:1); keep text centered because the avatar covers the bottom-left. The Twitch banner size for channel art is 1200×480 pixels, with the offline screen at full 1920×1080. The Etsy banner size for big shop headers is 3360×840 pixels (minimum 1200×300). For any of these banner sizes, use the Custom dimensions in the resizer above — type the numbers and export exactly.

How to convert any image to the right thumbnail size

You do not need Photoshop to fix a thumbnail size — our free YouTube thumbnail size converter runs entirely in your browser. Pick the preset for your platform, drop up to twenty images (or paste from your clipboard), and choose Fill to crop edge-to-edge or Fit to letterbox the whole photo on a background you pick. Set JPG or WEBP quality around 85–92, flip on the 2 MB optimizer under file caps, and download singly or as one ZIP. Nothing uploads to a server, so conversion is instant and private.