Image Resizer
Resize images to exact dimensions or by percentage. Lock aspect ratio to avoid stretching. Runs in your browser — images never leave your device.
Free forever
No upload — runs in browser
No signup
ADVERTISEMENT · 728×90
Drop your image here
Supports JPG, PNG, WebP — up to 10MB
Or drag & drop anywhere on this box
How to resize an image without losing quality
Our resizer uses the HTML5 Canvas API to redraw your image at the target dimensions using high-quality bicubic-style interpolation. It runs entirely in your browser — nothing is uploaded to a server.
For best results when reducing size, scale down by no more than 50% at a time for images you'll print. For web use, any reduction is fine. Scaling up (enlarging) will always result in some softness — no tool can add detail that wasn't there originally.
FAQ
Image Resizing — Frequently Asked Questions
Everything you need to know about our free image resizer.
How It Works
The tool draws your image onto an HTML5 Canvas at your target width and height using high-quality smoothing, then exports the result. Everything happens locally in your browser — no upload, no waiting on a server.
Yes. Enter your desired width and height in pixels in the Dimensions panel. With "Lock aspect ratio" enabled, changing one value automatically adjusts the other to keep your image from stretching.
Yes. Switch to the Percentage tab and use one of the quick presets (25%, 50%, 75%, 150%, 200%) or enter a custom percentage. This is useful when you want to shrink or enlarge an image proportionally without calculating exact pixels.
It keeps your image's original width-to-height ratio intact, so entering a new width automatically calculates the matching height. Turn it off only if you deliberately want to stretch or squash the image to a specific size, such as an ad slot with a fixed shape.
Dimensions & Quality
Shrinking an image (downscaling) preserves quality very well since there's more detail than needed. Enlarging an image (upscaling) will always introduce some softness, because the tool has to invent pixels that weren't in the original — no resizer can add real detail that isn't there.
You can set dimensions up to 8000×8000 pixels. Since resizing happens in your browser, very large target sizes may take a moment longer depending on your device.
Yes — choose JPG, WebP, or PNG as your output format in the sidebar before applying the resize. This lets you resize and convert format in a single step.
Usually yes — fewer pixels generally means a smaller file. But for the smallest possible file at a given size, also try our Image Compressor, which lets you fine-tune the quality/size trade-off separately from dimensions.
Free & Limits
Yes — completely free, with no account, no sign-up, and no watermarks. Resize as many images as you like.
There's no daily limit. Because resizing runs in your own browser, you can process as many images as you want.
No account is required — upload, set your dimensions, and download.
Privacy & Safety
No. Resizing runs entirely inside your browser using the Canvas API. Your image never leaves your device.
Yes — the tool works on iOS, Android, and desktop browsers. No app download needed.
Use Cases & Sizes
Use 1200×630 pixels — this is the standard Open Graph size used by Facebook, LinkedIn, and most link preview cards. Click the preset in the "Common sizes" panel to set it instantly.
A square post is 1080×1080 pixels. Use the Instagram square preset in the sidebar for a one-click setting.
At least 800×800 pixels is recommended for eBay and most marketplaces, and required as a minimum on some platforms for the zoom feature to work. Use the eBay product preset for a quick match.
Full HD is 1920×1080 pixels, which covers the vast majority of laptop and monitor screens. Use the HD wallpaper preset to set this instantly.
Check your theme or template's recommended banner dimensions (commonly 1600–1920px wide), enter those in the Dimensions panel with aspect ratio unlocked if needed, then apply. For the fastest page loads, also run the result through our Image Compressor.
Troubleshooting
This happens when "Lock aspect ratio" is off and the width/height you entered don't match the original proportions. Re-enable the lock, or use the "← Adjust dimensions" button to go back and try again.
Enlarging always introduces some softness, since the tool has to estimate pixels that weren't in the original image. For best results, avoid scaling up more than 150–200%, and start from the highest-resolution source image available.
Check that your file is under 10MB and in JPG, PNG, or WebP format. If it's too large, try our Image Compressor first, or try a different browser if the problem persists.