Repurposing

Social Media Image Resizer

Drop one image, tick the platforms you post to, and get a correctly cropped file for each — all in a single pass, all in your browser.

100% free · runs in your browser · nothing is uploaded

Pick one image, tick every size you need, and get them all in one pass.

Every size in one pass

Posting the same idea across platforms means the same image in five aspect ratios. Doing that by hand in an editor is fifteen minutes of repetitive cropping and exporting. This tool does the whole set at once: pick your sizes, choose how to crop, and download.

The sizes it covers

Crop to fill or fit whole

Crop to fill scales your image until it covers the frame and trims the overflow. Nothing is letterboxed, but the edges are lost — so if your subject sits off-centre, use the "keep this part" option to anchor the crop to the top, bottom or a side.

Fit whole image scales until everything is visible and fills the leftover space with a color you choose. Nothing is cut, but you get bars. Exporting as PNG in this mode leaves the bars transparent instead.

About quality

Going from a 4000-pixel photo to a 320-pixel cover in one step is where most resizers lose detail — the browser samples too few pixels and hard edges alias. This tool steps the image down by halves first, so text stays legible and faces stay clean. Start from the largest original you have and let it do the reducing.

Last updated August 9, 2026.

Frequently asked questions

Can I resize one image for several platforms at once?

Yes — that is the point of the tool. Tick as many sizes as you like and every one is generated in a single pass, with a Download all button when there is more than one result.

What size is a YouTube thumbnail?

1280×720 pixels at 16:9, under 2 MB. It is the first preset here and it is ticked by default.

Will resizing lose quality?

Some loss is unavoidable when you make an image smaller, but this tool reduces in halving steps rather than a single jump, which preserves noticeably more detail in text and faces. For the best result, always start from the largest original you have.

Which format should I export?

JPG for photos and thumbnails — smallest files, universally supported. PNG when you need transparency or perfectly crisp flat graphics. WebP when the platform supports it and you want both, at roughly 30% smaller than JPG.

Is there a limit on how many images I can resize?

No. The work happens on your own machine, so there is no quota, no queue and no cost to us. Use it as often as you like.

Stop designing thumbnails. Start generating them.

Describe your video, pick your face, and Thumblore returns click-ready 1280×720 thumbnails in seconds — free to start.

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