Resize Image for YouTube Thumbnail (1280×720)
Create a pixel-perfect YouTube thumbnail at 1280×720 in your browser. No design software needed.
Last updated
画像リサイズ
画像をオンラインでリサイズ
カスタムサイズまたはSNSプリセットに画像をリサイズ。ブラウザ内で動作 - アップロード不要。
クリックしてアップロードまたはドラッグ&ドロップ
PNG、JPG、WebP(最大50MB)
画像をアップロードして開始
画像リサイズについて
無料の画像リサイズツールで、任意のカスタムサイズに画像をリサイズしたり、人気のSNSプリセットから選択したりできます。Instagram、Facebook、Twitter、YouTubeなどの画像最適化に最適です。
機能:
- カスタム幅と高さのコントロール
- アスペクト比を保持するトグル
- SNSプラットフォーム用のクイックプリセット
- PNG、JPG、WebP形式のサポート
- 完全にブラウザ内で動作 - 画像はサーバーにアップロードされません
- 登録不要、透かしなしで完全無料
Why this matters
YouTube recommends 1280×720 px (16:9 aspect ratio) at under 2 MB for thumbnails. Uploading the wrong size forces YouTube to stretch or crop your image, which blurs text, cuts off faces, and reduces click-through rates. Getting the dimensions right before uploading costs 30 seconds and can meaningfully improve how your video performs in search results.
Step by step
- 1Open the Image ResizerDrop in the photo you want to use as your thumbnail.
- 2Enter 1280 × 720Type the dimensions or pick the YouTube thumbnail preset if available.
- 3Choose fit modePick "fill" to match exactly 1280×720, or "fit" to keep the aspect ratio and add padding.
- 4Adjust the cropDrag the crop area so the focal point (face, title text zone) is well-framed.
- 5DownloadSave as JPG for the smallest file size, or PNG if the thumbnail includes sharp text or graphics.
Frequently asked questions
What is the recommended YouTube thumbnail size?
1280×720 pixels (16:9), maximum 2 MB, JPG, PNG, GIF, or BMP format.
Can I upload a 1920×1080 thumbnail instead?
Yes — YouTube accepts it and will downscale. But 1280×720 is the sweet spot: it's sharp in all YouTube placements without unnecessary file size.
What's the best file format for a YouTube thumbnail?
JPG for photo-heavy thumbnails (smaller file, looks great). PNG if your thumbnail has text overlay or sharp graphics that suffer from JPG artifacts.
Is the thumbnail resized on your servers?
No. Resizing runs in your browser. Nothing is sent to a server.
YouTube compressed my thumbnail and it looks blurry — what happened?
YouTube re-encodes thumbnails at their servers. A high-contrast image with sharp edges before upload helps survive their compression. Start from a high-resolution original.
Can I resize multiple thumbnails for different videos at once?
Use the Batch Photo Editor to resize many images to 1280×720 in one pass.
Further reading
You might also need
- Resize Images for Facebook (Posts, Cover Photos, Stories)Resize photos for Facebook posts, cover photos, profile pictures, and stories to the exact dimensions Facebook expects. No surprises, no cropping.
- Resize Images for Instagram (Posts, Stories, Reels)Resize any photo to the exact dimensions Instagram expects — square, portrait, story, reel, or profile pic. Pick a preset and download.
- Resize Images for Twitter / XResize images for Twitter / X to the exact dimensions the platform expects, from in-tweet photos to profile headers.
- Compress JPG Images Online — Free & PrivateReduce the file size of JPG and JPEG photos right in your browser. Drop in any JPEG, pick your target size, and download the compressed image. Nothing is uploaded to a server.