Image Resizer
Resize images by exact dimensions, percentage, or social media presets. Free, no signup, processed in your browser.
Choose your files
Drop an image to resize
or browse files from your device
JPG, PNG, WebP, GIF · Single image
or press Ctrl+V to paste from clipboard
Resizing...
Image Resized!
What Is an Image Resizer?
An Image Resizer lets you change the dimensions of a digital image to exact pixel sizes, a percentage of the original, or pre-defined social media dimensions. Resizing is essential for preparing images for websites, social media profiles, printing, or any platform that requires specific image dimensions.
When Should You Resize Images?
- Social media posts and profiles — Resize images to exact dimensions for Instagram posts, YouTube thumbnails, Facebook covers, Twitter headers, LinkedIn banners, and more.
- Website images — Resize images to fit your website's layout dimensions exactly, improving page load speed and visual consistency.
- Printing and framing — Prepare images at the exact resolution and aspect ratio needed for print outputs.
- Reduce file size for sharing — Scaling down large images produces smaller file sizes that are faster to upload and share.
Benefits of Browser-Based Image Resizing
- No Uploads, Complete Privacy — All resizing happens in your browser using the Canvas API. Your images never leave your device.
- Three Resizing Modes — Resize by exact dimensions, by percentage (1% to 200%), or use ready-made social media presets.
- Aspect Ratio Lock — Lock the aspect ratio to maintain proportions automatically, or unlock for custom dimensions.
- Multiple Output Formats — Save the resized image as JPG, PNG, WebP, or keep the original format.
How It Works
Upload Image
Drag and drop or click to browse. Supports JPG, PNG, WebP, GIF.
Set New Size
Enter exact dimensions, use a percentage, or pick a social media preset like Instagram or YouTube.
Download
Click Resize. Your image is resized instantly in your browser and downloaded.
PNG to JPG
Convert PNG images to JPG format with quality controls
JPG to PNG
Convert JPG images to lossless PNG format
Frequently Asked Questions
Upload your image by dragging it onto the page or clicking to browse. Choose your resize mode: enter exact dimensions, use the percentage slider, or pick a social media preset. Click Resize, and your resized image is ready to download instantly — all in your browser, no uploads needed.
Yes. The Social Presets tab includes ready-to-use dimensions for Instagram (post, portrait, story, reel), Facebook (post, cover), Twitter (post, header), YouTube (thumbnail, banner), LinkedIn, Pinterest, TikTok, WhatsApp DP, and more. Just pick a preset and your image is resized instantly.
Scaling down (making the image smaller) has minimal quality loss. Scaling up (making the image larger) will reduce sharpness since new pixels must be created. For best results, always start with the largest version of your image.
Yes. Use the By Dimensions tab to enter custom width and height values. The aspect ratio lock is enabled by default, so changing one dimension automatically calculates the other. Unlock it to set fully custom dimensions.
Yes. Use the By Percentage tab to resize with a slider from 1% to 200%. Quick presets at 25%, 50%, 75%, 100%, 150%, and 200% make it easy to scale to common sizes.
Yes, by default. The aspect ratio lock (locked) is enabled, so changing the width automatically updates the height to maintain proportions. You can unlock it (unlocked) to set custom dimensions independently.
No. All resizing happens in your browser using the Canvas API. Your images never leave your device. We never upload, store, or access your files.
Yes. GoToolify works on any device with a modern browser. The interface is fully responsive and all processing happens locally on your device.