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Change image aspect ratio

Pick the frame a platform wants, then how to reach it: extend the scene with AI so nothing is cut off, fit the whole photo on blurred edges or white, or crop it to the frame. A landscape becomes a 9:16 story, a portrait a 16:9 thumbnail, anything a 4:5 or square post.

  • From 8 credits a run (about $0.08 on Starter), depending on the photo, with any DreamBench plan.
  • Extend runs on FLUX.2 [pro]; Crop and Fit call no model.
  • A preset of the AI image expander.

New frame
Method
  • No visible watermark
  • Commercial use included
  • Failed runs refunded
  • Cancel anytime

Your photo stays in this browser until you make the result. Uploads and results are removed after seven days; a result you keep stays in your library. Only upload images you have the right to use.

How do you change an image's aspect ratio without cropping?

You change an image's aspect ratio without cropping by extending it or fitting it. Extending keeps the photo whole and adds new scene around it with AI until it fills the frame; fitting keeps it whole on blurred edges or white. Nothing is stretched, and this page crops too. It is part of every DreamBench plan, from $9.99 a month.

How to change the aspect ratio of an image

  1. Upload a photo

    A landscape for a story, a portrait for a thumbnail, a vertical phone photo for a square post.

  2. Pick the frame and the method

    9:16 for Stories, Reels, Shorts and TikTok, 4:5 or 3:4 for a portrait post, 1:1 for a square post, 16:9 for YouTube and slides. Extend with AI, fit the photo whole, or crop it, then press Expand the image, Fit the photo or Crop the photo. The first time, create a free account and choose a plan.

  3. Download the reframed image

    Your photo in the new frame, extended, fitted or cropped, ready to download full size.

Which aspect ratio do I need?

Pick where the picture will go.

Instagram Reels, Stories or TikTok

9:16, vertical and full screen. Extend a landscape or square photo so the sky and the ground continue above and below it, with the subject clear of the top and bottom where the apps' buttons sit.

Uses

What is an aspect ratio?

An image's width set against its height. A 4032 × 3024 phone photo is 4:3; a 1080 × 1920 story is 9:16. Changing it means cutting the picture down, adding space around it, or stretching it; this page crops, extends or fits, and never stretches. Searching for resize to 9:16 usually means this: a new shape, not a new pixel count.

Which aspect ratio for which platform

9:16 for TikTok, Reels, Stories and YouTube Shorts; 4:5 or 3:4 for a portrait feed post; 1:1 for a square post; 16:9 for YouTube thumbnails, channel banners and slides. 2:3 for Pinterest and 1.91:1 for link previews are not offered here.

Turn a landscape photo into a 9:16 story

A wide photo in a story either shrinks to a strip between bars or is cropped to its middle. Extended to 9:16 instead, it fills the screen: the photo stays whole and the sky and the ground are continued above and below it. Keep the subject clear of the top and bottom, where the app's buttons sit.

Turn a portrait photo into a 16:9 thumbnail

A vertical phone photo in a 16:9 thumbnail or banner gets black bars at the sides. Extended instead, the scene carries on to the left and right, with room for a title beside the subject. A 4:3 phone photo is the same job with less to add: pick 16:9 and Extend for no bars and nothing cut off; Crop cuts a strip from the top and bottom instead, and Fit keeps the bars, blurred or white.

Fit a whole picture on Instagram without cropping

A feed post can be no taller than 4:5, so a tall phone photo is cut. Pick 4:5 and extend the scene to fill it, or fit the whole photo on blurred edges or white: either way all of it stays in the post.

Crop a photo to an exact ratio

When the subject sits in the middle with room around it, crop straight to the frame: nothing is invented and nothing is added, only the edges go. Use it for a 1:1 profile picture from a portrait, or a 16:9 banner from a wide shot.

Reframe a photo before you animate it

DreamBench's video models make clips in 9:16, 16:9 and 1:1, among others, so a photo extended to one of those starts a clip in the shape it will play, with nothing cropped.

Works with

What it takes
JPEG, PNG, WebP or HEIC, up to 40 MB, straight from a phone or a camera. An iPhone's HEIC photo becomes a JPEG on your device as you choose it, in any browser. A picture larger than 2048 pixels on its long edge is scaled to 2048 before the run.
What you get
A JPEG in the frame you pick: your photo extended with AI, fitted whole, or cropped.
Instagram, TikTok and YouTube Shorts
9:16 fills a story, a reel or a short from top to bottom.
YouTube and presentations
16:9 for thumbnails, channel banners and most slides.
Instagram and Facebook feeds
1:1 for a square post; 4:5 or 3:4 for a portrait post.
The DreamBench composer
Animate this reframed image opens it as the reference for a clip in the same frame, or 9:16 for a 3:4 image and 1:1 for a 4:5 one.

Worth knowing

Which model runs it, and where it fails

Runs on FLUX.2 [pro]. FLUX.2 [pro] is an image model from Black Forest Labs. DreamBench runs its outpainting on fal, which draws only the new border around your photo, so the photo itself keeps its own pixels. A run the model declines under its content rules is refunded.

Three ways to the frame

Extend continues the scene with AI, Fit keeps the whole photo on blurred edges or white, and Crop cuts the frame from the middle. Fit and Crop call no model.

The frames platforms ask for

9:16 for stories and short video, 4:5 and 3:4 for portrait posts, 1:1 for a square post and 16:9 for YouTube and slides, each named for where it goes.

The scene continues

With Extend, your whole photo stays in the middle at its own size, and light, perspective and style carry on past the old edges into the new area.

Where it fails

  • The added scene is invented: it can't show what was really there, so a cut-off person or sign is finished by guesswork.
  • A wide photo taken to 9:16, or a tall one to 16:9, gains more new picture than it had; busy scenes show it most.
  • Faces, hands and text near the old edge are the hardest to continue.
  • Crop cuts from the middle: a subject near an edge can fall outside the frame, so extend or fit that photo instead.

Aspect ratio changer FAQ

How do I change the aspect ratio of an image?

Upload the photo, pick 9:16, 4:5, 1:1, 3:4 or 16:9, then pick how: extend the scene with AI, fit the whole photo on blurred edges or white, or crop it to the frame. Press the button and download the result full size. Make it with any DreamBench plan.

What is the difference between cropping and changing the aspect ratio here?

Cropping cuts the photo down to the new shape and throws away whatever falls outside it; Crop here does that, from the middle. Extend and Fit keep the whole photo instead: Extend adds new picture around it with AI, which is generated rather than real, and Fit sets it on blurred edges or white.

Can I make a photo 4:5 for Instagram?

Yes: pick 4:5, the tallest a feed post can be. Extend the scene to fill it, fit the whole photo on blurred edges or white, or crop it to 4:5 from the middle. Each gives a picture Instagram shows as it is, without cropping it again.

Do Fit and Crop use AI?

No. Fit and Crop are made without a model and are priced as a task, the same price the prompt generators charge, rather than at the model's price. Crop always cuts the frame from the middle, so extend or fit a photo whose subject sits near an edge; Fit offers two backings only, a blurred, darkened copy of the photo or white, with no color picker. Only Extend uses AI.

Which aspect ratio should I use for TikTok, Reels and YouTube?

9:16 for TikTok, Instagram Reels and Stories, and YouTube Shorts: vertical and full screen. 16:9 for a YouTube video's thumbnail, a channel banner and most slides. 1:1 for a square feed post, and 4:5 or 3:4 for a portrait one.

Can I change an image's aspect ratio in Canva or Photoshop instead?

Yes: Canva's Magic Expand and Photoshop's Generative Expand both extend a picture to a new shape with AI, as part of their paid plans. This page does it in any browser, and fits or crops the photo as well.

How do I change the aspect ratio of a photo on my iPhone or Android phone?

On an iPhone, Photos, Edit, Crop offers ratios such as square and 9:16, but it cuts the picture down, and the crop in an Android phone's gallery app does the same. This page changes the aspect ratio in either phone's browser instead: extend the scene with AI, fit the whole photo on blurred edges or white, or crop it. One photo per run; there is no batch upload.

How do I find out the aspect ratio of my photo?

To find a photo's aspect ratio, divide its width by its height. 4032 × 3024 gives 1.33, which is 4:3; 1920 × 1080 gives 1.78, which is 16:9; 1080 × 1920 gives 0.56, which is 9:16. The pixel size is in the photo's info on a phone, or in its Properties or Get Info on a computer.

What is the difference between aspect ratio and resolution?

Aspect ratio is the shape, width against height; resolution is the number of pixels. A 1080 × 1920 picture and a 2160 × 3840 one are both 9:16, but the second has four times the pixels. This page changes the shape, not the pixel count.

Does the reframed image have a watermark?

No. DreamBench adds no watermark to the image you download, whichever method made it. Fit and Crop return your photo's own pixels; with Extend, the image model that drew the new border may embed an invisible mark of its own.

Will changing the aspect ratio stretch or distort my photo?

No. Each method keeps your photo in its own proportions: Extend adds new scene around it, Fit sets it whole on blurred edges or white, and Crop cuts the frame from the middle. Nothing is pulled out of shape.

Does changing the aspect ratio reduce the image quality?

Crop and Fit keep your photo's own pixels, after the scale-down every large upload gets. Extend scales the photo to fit the wider canvas before it draws the new border, so the result can have fewer pixels than your upload; run it through the AI image upscaler for a large print.

Can I use the aspect ratio changer without paying?

No. Every method needs a DreamBench plan, and you create an account on the way to it. The button shows each run's price in credits before you press it, and a run that fails is refunded.

Can it change the aspect ratio of a video?

No. It reframes one still photo. A video has to be reframed in a video editor, by cropping it or adding bars. DreamBench's video models can start a new clip from the reframed photo in the frame it was made for.

How much does the Aspect ratio changer cost?

A run starts at 8 credits from your DreamBench plan, depending on the photo, and once you have a plan the button shows each run's price before you press it. Starter, $9.99 a month, includes 1,100 credits a month, at least 100 runs of the Aspect ratio changer, plus AI video. A run that fails is refunded.

Do I need an account to use the Aspect ratio changer?

Yes: a free account and a DreamBench plan. The tools are part of every plan, from Starter at $9.99 a month.

Which image files does the Aspect ratio changer take?

A photo up to 40 megabytes: JPEG, PNG, WebP, HEIC or another format your browser opens. A photo straight from a phone is fine, an iPhone's HEIC included: the page scales a large picture down to 2048 pixels on its long edge before the run, so the result is never larger than the page says.

Can I use what the Aspect ratio changer makes commercially?

Yes. Under the DreamBench Terms you may use what a tool makes for personal and commercial purposes, including advertising, monetized content and work for clients, with no separate commercial-use upgrade. The Terms don't guarantee copyright in a result or clear another person's rights in your upload, so only use photos you have the rights to.

Is my photo used to train AI?

No. DreamBench doesn't use your prompts, uploads or videos to train or fine-tune AI models, and any future training program would be opt-in.

What happens to my uploaded photo?

It stays in your browser until you make a result. Then it is used to make that result and nothing else, and removed from the tool's storage after seven days along with the result. A result you keep in your library stays as long as you keep it.

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Then make it move

Every result can go into a video.

Keep what the Aspect ratio changer made in your library and open it in the composer as a reference image. DreamBench writes the scenes and renders them on the model you pick, from Seedance 2.5 to Veo 3.1 and Kling 3.0. Rendering uses credits, which come with a plan.

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