Image Size Converter

"Image size" means two things: the pixel dimensions (width x height) and the file size in KB. Resize to exact pixel dimensions right here for JPG, PNG, and WebP. Need a specific KB file size, or a different format? Use our image compressor or image converter. Your images stay sharp.

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Meet an Exact Pixel Size→

Some uploads demand precise dimensions. A profile photo has to be 400x400. A passport photo needs 600x600 to 1200x1200 pixels. A banner must be exactly 1500x500. Set the width and height you need and the converter delivers that size to the pixel, no cropping guesswork.

Resize to exact dimensions→

Hit a File-Size Limit in KB→

Job portals, visa applications, and school forms cap uploads at 100KB, 240KB, or some other odd number. That is a file-size limit, not a pixel-dimension one, so our image compressor is the tool for it: set your target file size and it tunes quality to land under the limit while keeping the photo readable.

Compress to a target size→

Get Social-Media-Ready Sizes

Every network wants its own dimensions. Instagram feed posts are 1080x1080 (or 1080x1350 for portrait), Stories and Reels are 1080x1920, and a YouTube thumbnail is 1280x720. Convert once to the right size so your photo fills the frame instead of getting cropped or letterboxed.

Shrink Photos for Email and Web→

Big pictures bounce off email limits and slow your website to a crawl. Resize the dimensions here, then shrink the file with our compressor or switch to WebP with our converter for roughly 30% smaller files than JPEG at the same quality. Your images send, load, and look right everywhere.

Convert the image format→

Enlarge Without the Blur→

Shrinking a photo keeps it crisp, but stretching it past its original pixels turns it soft. When a small image has to fill a bigger space, our AI image upscaler adds real detail at 2x or 4x instead of blowing up blurry pixels.

Upscale without losing quality→

Two Kinds of "Image Size"

Pixel dimensions and file size in KB are different things. Resize dimensions here; use the linked tools for file size and format.

Change the Dimensions (here)

Set an exact width and height in pixels. This is the size measured in pixels, the actual width and height of the image, and it is what this tool changes. Perfect for profile photos, thumbnails, and platform presets.

Change the File Size

Need the image under 50KB, 100KB, or 240KB? That is file size, not dimensions, and it is what most upload forms actually check. Our image compressor at /tools/image-compressor tunes quality to hit a target KB size.

Which Formats Work Here

This resizer accepts JPG, PNG, and WebP and saves your result as a JPG. To change formats, say HEIC to JPG or PNG to WebP, use our image converter at /tools/image-converter. PNG keeps transparency, JPG is smaller for photos, and WebP is smallest of all at comparable quality.

How to change the size of an image?

1
Step 1: Upload Your Image
Drag and drop any photo or picture, or click to choose one from your device. We support JPG, PNG, and WebP.
2
Step 2: Set the Pixel Dimensions
Enter the exact width and height you need in pixels and the resizer scales your image to match, no cropping guesswork. For a KB file-size target use our image compressor; to change format use our image converter.
3
Step 3: Download
Your resized image is ready instantly at the exact dimensions you asked for, saved as a JPG. Download it directly to your device, no watermarks, no signup.

Users Love Our Image Size Converter

4.8

| 1.3M+ Ratings

One of my go-to apps

Great app for filtering photos and even greater app for sizing pictures for not only posts but story photos as well... love this app I mainly use insta size for all my posts now ;)

@beachxbunny

Fast and Straightforward

Resizing photos for social media should be a cinch, but most editing programs are a pain to use. Of the dozen I’ve used, Instasize is the fastest, easiest and most consistent...

@Soho Brad

Great Sizes

Perfect app for the exact social media picture sizes. Love it. I use it daily. & I like the premade options they give you for different social medias!

@Baby24doll

I love instasize

Its the best app. for sizing photos to fit for Instagram or other forms of social media. You can also edit photos and create collages with multiple photos. It’s had been my friend for several years!

@Jay town

Always helpful

Always helpful when needing to resize photos

@Leobaby96

Huge fan

I love this app. Makes posting all types of photos. Love how it makes them fit on different formats

@Nicola Bella

I’ve been using for years. Can’t work without it.

I use this app everyday to perfectly resize images for all of my social media platforms

@The Flywire

LOVE

This app saved the day for me! I’m finally able to resize my photos for IG....effortlessly

@Tamrinaann

Great App

We use this App weekly to resize pics for social media posts. Very user friendly, easy to use program when you want to get in and out quickly...

@cle957

One of my go-to apps

Great app for filtering photos and even greater app for sizing pictures for not only posts but story photos as well... love this app I mainly use insta size for all my posts now ;)

@beachxbunny

Fast and Straightforward

Resizing photos for social media should be a cinch, but most editing programs are a pain to use. Of the dozen I’ve used, Instasize is the fastest, easiest and most consistent...

@Soho Brad

Great Sizes

Perfect app for the exact social media picture sizes. Love it. I use it daily. & I like the premade options they give you for different social medias!

@Baby24doll

I love instasize

@Jay town

Always helpful

Always helpful when needing to resize photos

@Leobaby96

Huge fan

I love this app. Makes posting all types of photos. Love how it makes them fit on different formats

@Nicola Bella

I’ve been using for years. Can’t work without it.

I use this app everyday to perfectly resize images for all of my social media platforms

@The Flywire

LOVE

This app saved the day for me! I’m finally able to resize my photos for IG....effortlessly

@Tamrinaann

Great App

We use this App weekly to resize pics for social media posts. Very user friendly, easy to use program when you want to get in and out quickly...

@cle957

One of my go-to apps

Great app for filtering photos and even greater app for sizing pictures for not only posts but story photos as well... love this app I mainly use insta size for all my posts now ;)

@beachxbunny

Fast and Straightforward

Resizing photos for social media should be a cinch, but most editing programs are a pain to use. Of the dozen I’ve used, Instasize is the fastest, easiest and most consistent...

@Soho Brad

Great Sizes

Perfect app for the exact social media picture sizes. Love it. I use it daily. & I like the premade options they give you for different social medias!

@Baby24doll

I love instasize

@Jay town

Always helpful

Always helpful when needing to resize photos

@Leobaby96

Huge fan

I love this app. Makes posting all types of photos. Love how it makes them fit on different formats

@Nicola Bella

I’ve been using for years. Can’t work without it.

I use this app everyday to perfectly resize images for all of my social media platforms

@The Flywire

LOVE

This app saved the day for me! I’m finally able to resize my photos for IG....effortlessly

@Tamrinaann

Great App

We use this App weekly to resize pics for social media posts. Very user friendly, easy to use program when you want to get in and out quickly...

@cle957

Image Size Converter FAQ

Can't find what you're looking for? Contact support

: "Image size" can mean two things: an image's pixel dimensions (width and height) or its file size (KB/MB). This page resizes to exact pixel dimensions, and links you to our image compressor for KB file-size targets and our image converter for format changes, so your photo fits wherever it needs to go.