YouTube thumbnail size: dimensions, file size and safe areas

A custom thumbnail is the single biggest thing you control about whether someone clicks your video. YouTube’s requirements are simple, but the thumbnail is mostly seen tiny on a phone — so size the text and pick the layout for that, not for your monitor.

Make a YouTube thumbnail free →

The requirements

Size: 1280 × 720 pixels, with a minimum width of 640 pixels.
Aspect ratio: 16:9 — the same shape as the player, so nothing is cropped or letterboxed.
File size: under 2 MB.
Format: JPG, PNG or GIF (not animated). JPG is usually the best balance of quality and size.
Account: custom thumbnails need a verified YouTube account (phone verification in YouTube Studio).

Safe areas and layout

Bottom-right corner: YouTube puts the video length over it. Keep text and faces out of roughly the last 20% of the width and bottom 15% of the height.
Phone size: in the feed and sidebar a thumbnail can be under 200 pixels wide. Use three to five words, very large type and a thick outline or a box behind the text.
One focal point: a face, an object or a single bold word. Busy thumbnails turn into noise at small sizes.
Contrast: bright subject on a darker or blurred background, and a highlight colour for the one word that matters.

Step by step

Open the Glowtrack Studio thumbnail maker — it starts at 1280 × 720 with the video-length area marked in pink.
Pick a template, then add a background photo and, if you like, a cut-out PNG of yourself or your subject.
Type a short headline. Put *asterisks* around the word to highlight and press Enter for a second line.
Check the phone-size preview and the checks under it; move anything out of the pink area.
Download the JPG — it’s automatically kept under YouTube’s 2 MB limit — and upload it in YouTube Studio.

Make a YouTube thumbnail free →

Questions

Can I use a 1920 × 1080 thumbnail?

Yes, it’s the same 16:9 shape and YouTube scales it down — as long as the file stays under 2 MB. 1280 × 720 is plenty and keeps the file small.

What about YouTube Shorts?

Shorts use a frame from the video or a cover chosen in the app, shown in a vertical 9:16 crop. For a Shorts cover, use the Story / Reel / Shorts size (1080 × 1920).

Why is my thumbnail blurry?

Usually the source photo is too small or the JPG was compressed hard to fit 2 MB. Start from a large image and export at 1280 × 720.