What size is a YouTube thumbnail?

YouTube's official spec is 1280 x 720 pixels at 16:9 aspect ratio, JPG or PNG, under 2 MB. The minimum is 640 pixels wide, but 1280 x 720 is the recommended size for high-quality display across phones, tablets, TVs, and web. This tool exports at exactly 1280 x 720 and auto-compresses the JPG to stay under 2 MB.

Why is there a 2 MB file size limit?

YouTube enforces a hard 2 MB upload cap on custom thumbnails - larger files are rejected at upload time. This tool runs a binary-search JPG compressor after the crop that finds the highest quality setting that still fits the 2 MB cap. The result is the best possible quality at YouTube's hard limit.

What aspect ratio do I need?

16:9 - the same as the YouTube video player. The cropper locks to this ratio automatically; drag the crop frame across your source image to choose what to keep. Anything outside the 16:9 frame is cropped off. If your source image is already 16:9, frame as much of it as you want.

Where on the thumbnail should I keep important content?

Avoid the bottom-right corner - YouTube overlays the video duration (timestamp) there in a small dark badge. Avoid the very bottom edge too, since the title preview can crop into the thumbnail on some layouts. The safest area is the upper-left two-thirds of the frame. Keep faces, key text, and your subject within this safe area.

Should I use JPG or PNG?

JPG for thumbnails with photographic content (faces, scenes, blurred backgrounds) - it produces much smaller files at the same visible quality, which is critical for staying under YouTube's 2 MB cap. PNG only if your thumbnail is mostly flat colors and sharp text (rare for YouTube). This tool exports JPG by default for the size advantage.

Is my image uploaded anywhere?

No. The thumbnail maker runs entirely in your browser - the crop, resize, and JPG compression all happen on your device using Canvas API and WebAssembly. Confirm in DevTools Network tab or by going offline after the page loads.

Can I add text to my thumbnail in this tool?

Yes. Toggle the Text overlay panel under the cropper to add a bold title, channel name, or callout directly onto your thumbnail. Controls cover text content (multi-line supported), font size (S/M/L/XL presets plus a slider from 4% to 40% of canvas height), text color, bold weight, an optional outline with its own color and thickness, and a 9-cell position picker (top-left through bottom-right). A live 480 px preview renders the cropped image with the text overlaid so you can iterate before downloading.

Can I use an iPhone HEIC photo as my thumbnail source?

Yes. Drop the .heic or .heif file straight from your iPhone Camera Roll - ImgShifter decodes it locally with a WebAssembly module, then crops, resizes to 1280 x 720, and compresses under YouTube's 2 MB cap. The HEIC decode never reaches a server, and the final JPG drops straight into the YouTube upload form.

Browser only - 100% private

YouTube Thumbnail Maker

Crop and resize any image to YouTube's official thumbnail spec: 1280 x 720 (16:9), JPG, under 2 MB. Browser-only, no upload required.

Instant preview Privacy-first No signup

Drag, drop, paste, or browse

JPG, PNG, WEBP, GIF, AVIF, and HEIC up to 50 MB. Paste from clipboard with Ctrl+V.

Batch upload supported

Upload an image to build a YouTube thumbnail.

1280 x 720 (16:9), JPG, capped at 2 MB

YouTube Thumbnail online with ImgShifter

YouTube Thumbnail Maker is a focused, single-purpose cropper for YouTube thumbnail images. The aspect ratio is locked to 1280 x 720 (16:9) - the exact spec the YouTube upload form renders against - so the result drops straight into your YouTube upload without any further resizing or re-export. Drag the crop frame across your source image, click Download, and you get a clean JPG sized to spec.

Behind the crop, ImgShifter resizes the output to exactly 1280 x 720, then runs a binary-search JPG compressor that finds the highest quality setting that still fits YouTube's hard 2 MB upload cap. Files larger than 2 MB are rejected at upload time, so this tool guarantees the result will go through. Keep important content out of the bottom-right corner where YouTube overlays the video duration timestamp.

Everything runs in your browser. The crop, resize, and JPG compression all happen on your device using the Canvas API and WebAssembly. No upload, no signup, no watermark. Confirm in DevTools Network tab, or disconnect from the internet after the page loads.

Other ImgShifter tools people use alongside YouTube Thumbnail.

Browser only

OG Image

Crop any image to the Open Graph / Twitter summary_large_image spec: 1200 x 630, JPG. Used by Facebook, LinkedIn, Twitter/X, Discord, and Slack link previews.

Browser only

Crop

Crop images with aspect-ratio presets, zoom controls, and a live preview.

Browser only

Aspect Ratio

Change the aspect ratio of any image - 1:1, 4:5, 4:3, 3:2, 16:9, 21:9, and 9:16 presets, in your browser.

Browser only

Compress

Reduce image file size with a quality slider and instant before/after stats. Powered by jsquash MozJPEG, libwebp, and AVIF encoders.

Frequently asked questions

Short answers for image workflows, privacy, and supported formats.

YouTube Thumbnail Maker

Drag, drop, paste, or browse

YouTube Thumbnail online with ImgShifter

Related tools

OG Image

Crop

Aspect Ratio

Compress

Frequently asked questions

What size is a YouTube thumbnail?

Why is there a 2 MB file size limit?

What aspect ratio do I need?

Where on the thumbnail should I keep important content?

Should I use JPG or PNG?

Is my image uploaded anywhere?

Can I add text to my thumbnail in this tool?

Can I use an iPhone HEIC photo as my thumbnail source?