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Resize Image by Pixels
Need an image at exact pixel dimensions for a platform upload, a print order, or a web layout? This free image resizer changes any JPG, PNG, or WebP photo to the precise width and height you type, with an aspect ratio lock that keeps proportions honest and PNG or JPG download options. Everything runs in your browser with no signup and no watermark, so your images never leave your device. For the most common platform sizes, see the quick reference table below.
How to use
- Upload your image (JPG, PNG, or WebP). The original dimensions appear automatically.
- Type the new width and height in pixels. Leave the aspect lock on to avoid distortion.
- Choose PNG for graphics or JPG for photos.
- Click Resize Image, preview the result, and download.
Common image sizes by platform
Instagram square post: 1080x1080. Instagram story and reel: 1080x1920. YouTube thumbnail: 1280x720. Facebook shared image: 1200x630. Facebook cover photo: 820x312. X post image: 1200x675. LinkedIn cover: 1584x396. Pinterest pin: 1000x1500. Full HD: 1920x1080. E-commerce product square: 800x800 to 1080x1080.
Type any of these into the width and height boxes above. If the platform crops uploads to a fixed shape, keep your subject centered so nothing important gets cut.
Resize vs compress: which do you need?
Resize when the dimensions are wrong: a 6000 pixel wide photo being displayed at 300 pixels wastes bandwidth and slows the page. Shrinking it to the display size is the single biggest file saving you can make, often larger than compression alone.
Compress when the dimensions are already right but the file is still heavy. The two steps stack: resize first to the exact display dimensions, then compress. Doing it in the other order, or skipping the resize, leaves easy savings on the table.
Frequently asked questions
Will resizing change my image quality?
Making an image smaller keeps it sharp, because you are only removing pixels. Making it much larger can look blurry, because the browser cannot invent detail that is not there. For best results, always resize down from a larger original rather than up.
What does the aspect ratio lock do?
When the lock is on, changing the width automatically adjusts the height to keep the original proportions, so your image never looks stretched or squashed. Turn it off only when you need exact custom dimensions that differ from the original ratio.
Should I choose PNG or JPG?
Choose PNG for graphics, logos, screenshots, or anything needing sharp edges and transparency. Choose JPG for photos, since it produces much smaller files with quality that still looks great.
What is the difference between resizing and compressing?
Resizing changes the pixel dimensions, for example from 4000x3000 down to 1200x900. Compressing shrinks the file size without changing dimensions. For the smallest file that still looks good, resize first to match your display size, then compress the result.
What size should I use for Instagram, YouTube, or Facebook?
Common targets: Instagram square post 1080x1080, Instagram story 1080x1920, YouTube thumbnail 1280x720, Facebook shared image 1200x630, X post 1200x675. The full reference table is in the section below.
What is the maximum size?
You can enter up to 8000 pixels per side. Extremely large images may be slow on older devices, so give your browser a moment to finish.
Are my images uploaded anywhere?
No. Resizing happens entirely in your browser using the Canvas API. Your images never leave your device.