Free tool · runs in your browser

Thumbnail Cropper

Crop any image to the exact shape a platform needs — 16:9 for YouTube, 1:1 for Instagram, 9:16 for Shorts, or a free ratio. Drag an interactive box, watch the output dimensions update live, and export as JPG or PNG, all in your browser.

How to use this tool

  1. 01

    Upload your image

    Drag-drop or click; it's cropped entirely in your browser and never uploaded.

  2. 02

    Pick aspect ratio

    16:9 for YouTube, 1:1 for Instagram, 9:16 for Shorts, or Free for anything else.

  3. 03

    Adjust the crop box

    Drag the box to move it or a corner to resize; the aspect ratio stays locked unless you chose Free.

  4. 04

    Download the cropped image

    Choose JPG for photos or PNG for graphics with transparency, then download.

Why this matters

Creators constantly need the same shot at different shapes — a 16:9 YouTube thumbnail, a 1:1 for the Instagram grid, a 9:16 for Shorts and Reels — and handing each platform the wrong ratio means its automatic crop quietly chops a face or the text out of frame. Doing the crop yourself is the only way to guarantee the right thing stays in the shot on every surface.

This cropper locks to the platform ratios (or frees up entirely), dims everything outside the selection so you see the exact result, and shows the live output resolution while you drag — all in your browser with nothing uploaded. When the framing is already right and you only need to hit specific pixel dimensions, reach for the Thumbnail Resizer instead.

Related tools

Thumbnail Resizer

Resize a thumbnail to YouTube, Instagram, Twitter, and Facebook sizes or a custom WxH. One size downloads directly, multiple as a ZIP. No upload, free.

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Format Converter

Convert a thumbnail between JPG, PNG, and WebP with a quality setting, and see the before/after file size. Runs entirely in your browser. No upload.

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Thumbnail Preview

Preview your YouTube thumbnail at all four display sizes — full, search, sidebar, and mobile — plus a mobile feed mock-up. Free, no upload, no signup.

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FAQ

They solve different problems. Cropping trims pixels away — you keep a rectangular region at its original resolution and discard the rest. Resizing scales every pixel, changing the whole image's dimensions without removing content. Crop to reframe or change aspect ratio; resize when the composition is right but you need exact output dimensions — for that, use the Thumbnail Resizer.

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