How do I resize an image without losing the aspect ratio?

GhostImage only asks for one number — the longest side. Width and height are scaled together so proportions never change and nothing looks stretched.

Can it make an image bigger?

No — Resize only scales down (asking for a size larger than the image leaves it unchanged). To enlarge a photo without blur, use GhostImage's AI Upscale, which runs a super-resolution model on your device.

What size should I pick for the web?

1920 px covers full-width hero images, 1200 px suits article images, and 400–800 px is plenty for thumbnails and avatars. Smaller pixels mean faster pages.

Is my photo uploaded to a server?

No. The resampling runs in a Web Worker in your browser. There's no upload endpoint — the photo never leaves your device.

Resize and compress together?

Yes — that's the studio's whole point. Resize first, then add a Compress step; the two together routinely cut a phone photo by 95%.

Resize an image to fit.

Set the longest side in pixels and the photo scales down proportionally — on your device, never uploaded.

Resize an image in your browser by setting a maximum for its longest side — GhostImage scales it down proportionally, so nothing gets stretched or squashed. Perfect for hitting upload limits (profile photos, marketplace listings, forum avatars) or shrinking a 12-megapixel phone photo to web size. The resize runs in a Web Worker on your device; the photo is never uploaded. Note this tool only scales down — for making an image larger, use the on-device AI Upscale instead.

How it works

1
Drop your image
Drag a JPG, PNG, WebP, AVIF, or HEIC file onto the page. It opens in the GhostImage studio with Resize pre-selected and shows the current dimensions.
2
Set the longest side
Type the maximum size in pixels — e.g. 1920 for full-HD web use, 1080 for social. The aspect ratio is always preserved.
3
Download the resized image
Save it from your browser, or keep stacking — compress after resizing for the smallest possible file.

Frequently asked questions

How do I resize an image without losing the aspect ratio?
GhostImage only asks for one number — the longest side. Width and height are scaled together so proportions never change and nothing looks stretched.
Can it make an image bigger?
No — Resize only scales down (asking for a size larger than the image leaves it unchanged). To enlarge a photo without blur, use GhostImage's AI Upscale, which runs a super-resolution model on your device.
What size should I pick for the web?
1920 px covers full-width hero images, 1200 px suits article images, and 400–800 px is plenty for thumbnails and avatars. Smaller pixels mean faster pages.
Is my photo uploaded to a server?
No. The resampling runs in a Web Worker in your browser. There's no upload endpoint — the photo never leaves your device.
Resize and compress together?
Yes — that's the studio's whole point. Resize first, then add a Compress step; the two together routinely cut a phone photo by 95%.

Related image tools

Compress

Crop

Upscale

Every GhostImage tool runs entirely in your browser. Your file is never uploaded — there's no upload endpoint to send it to.