Photo Resize in PX - Resize Image by Pixels Free Online
Resize your images to exact pixel dimensions. Set custom width and height in pixels for web, social media, printing, or any size requirement. Free, no signup, no watermark.
Resize by Pixels
Drag and drop your images here
or click to browse your files
Supports JPG, PNG, WebP, and GIF (100% browser-based)
This free online photo resize in px tool lets you set the exact pixel width and height for any image. Whether you need to resize image in px for a website, convert image pixels for social media upload, or change the pixel dimensions for a specific platform requirement, this tool handles it in three clicks. Upload your image, enter your pixel dimensions, and download. Your file never leaves your device.
How to Resize Image by Pixels Online
Resizing a photo in px takes under 30 seconds. Follow these steps to resize image in px for free:
- 1
Upload your image
Upload your JPG, PNG, WebP, or GIF file by clicking the upload area or dragging and dropping it. All processing happens in your browser so your image never leaves your device.
- 2
Enter your pixel dimensions
Type the exact width and height in pixels. Toggle the aspect ratio lock to maintain proportions, or unlock it to set fully custom dimensions.
- 3
Click Resize
The tool applies your pixel dimensions instantly with no waiting time.
- 4
Download your resized image
Click Download to save your photo at the exact px size you specified. No watermark, completely free.
This image to pixel converter works for any custom size. You can convert image px for web banners, social media posts, profile photos, or any platform that requires specific pixel dimensions.
Common Image Sizes in Pixels
Use these standard pixel dimensions as a reference when you resize image in px for specific platforms or use cases:
Web and screen sizes
- Full HD desktop1920 × 1080 px
- HD desktop1366 × 768 px
- Tablet1024 × 768 px
- Mobile375 × 667 px
- Mobile (large)414 × 896 px
Social media pixel sizes
- Instagram post (square)1080 × 1080 px
- Instagram (portrait)1080 × 1350 px
- Facebook cover photo1200 × 628 px
- Twitter / X header1500 × 500 px
- LinkedIn cover1584 × 396 px
- YouTube thumbnail1280 × 720 px
- WhatsApp profile photo500 × 500 px
Print pixel sizes at 300 DPI
- Passport (3.5 × 4.5 cm)413 × 531 px
- A4 page2480 × 3508 px
- 4×6 photo print1181 × 1772 px
- Wallet size (2.5 × 3.5 cm)295 × 413 px
Enter any of these pixel dimensions directly into the photo resize in px tool above to resize your image to that exact size instantly.
Pixels vs Centimeters, Which Should You Use for Resizing?
Choosing between pixel dimensions and centimeter dimensions depends on what you are using the image for:
Use pixel dimensions when
- •Uploading to websites, apps, or social media platforms that specify requirements in pixels
- •Designing for screens where physical print size does not matter, only screen resolution does
- •Resizing images for email templates, web banners, or UI components
- •A platform gives you upload requirements like "minimum 1080 x 1080 px"
Use CM dimensions when
- •You need a physical print at an exact size such as a passport photo or ID card
- •A form or government authority requires photo dimensions stated in centimeters
- •You are printing on A4 or any standard paper size
If you need to resize in centimeters instead of pixels, use our Image Resizer in CM which sets exact centimeter dimensions for passport photos, ID cards, and official documents.
What Is a Pixel and Why Does Image Pixel Size Matter?
A pixel (short for picture element) is the smallest unit of a digital image. Every image on a screen is made up of a grid of pixels, each displaying one color. The total number of pixels in an image is its resolution. For example, a 1920 x 1080 px image contains 2,073,600 pixels in total.
Why does pixel size affect image quality?
When you increase the pixel count by enlarging an image, the software has to create new pixels by estimating what color they should be. This is called upscaling and it reduces sharpness. When you reduce the pixel count, the software removes pixels which usually maintains quality well. Resizing to smaller pixel dimensions almost always keeps good image quality, while enlarging beyond the original size reduces sharpness.
What is the difference between px, resolution, and DPI?
Pixels (px) measure the digital dimensions of an image. Resolution refers to the total pixel count. DPI (dots per inch) is a print measurement that tells a printer how many pixels to fit into each physical inch. A 300 DPI image at 4 x 6 inches requires 1200 x 1800 pixels. For screen use, DPI does not matter. For print, it determines how sharp the output will be.
Can I resize image in px and reduce file size in KB at the same time?
Reducing pixel dimensions automatically reduces file size because there are fewer pixels to store. If you need to reduce file size further to meet a specific KB limit, use our Image Compressor to reduce your photo from MB to KB without additional quality loss.
Other Free Image Tools
Image Resizer in CM
Resize your image to exact centimeter dimensions for passport photos and official documents
Image Compressor
Reduce image file size from MB to KB after resizing in px
Resize Image by Percentage
Scale your image up or down by a percentage of its original size
Passport Photo Resizer
Resize to exact passport photo dimensions in one click
Image to A4 Size Converter
Resize any image to A4 paper size (21 x 29.7 cm) for printing
Frequently Asked Questions
How do I resize a photo in px online for free?
Upload your image using the tool above. Enter the exact pixel width and height you need and click Resize. Your image will be resized to those exact px dimensions instantly and is ready to download.
What does resize image in px mean?
Resizing an image in px means changing its pixel dimensions, the width and height measured in pixels. For example changing a 3000 x 2000 px photo to 1080 x 720 px makes it smaller and reduces the file size at the same time.
Is this an image to pixel converter?
Yes. This tool lets you convert image pixel dimensions to any custom size you need. Enter the target width and height in pixels and the tool resizes your image to those exact dimensions instantly.
Will resizing reduce image quality?
Resizing to smaller pixel dimensions maintains quality well. Resizing to larger dimensions (upscaling) can reduce sharpness because the tool must estimate new pixels. For the best results, resize down rather than up whenever possible.
Can I resize image in px and kb at the same time?
Reducing pixel dimensions automatically reduces file size in KB. If you need to reduce file size further to meet a specific KB limit, use our Image Compressor after resizing.
What pixel size should I use for social media?
The most common sizes are: Instagram 1080 x 1080 px, Facebook post 1200 x 628 px, YouTube thumbnail 1280 x 720 px, and Twitter header 1500 x 500 px. Enter these dimensions directly into the tool above.
Is this tool free?
Yes. No account, no watermark, no hidden charges. All processing happens in your browser so your images stay completely private.