Resize Image Online
Resize JPG, PNG, WebP, SVG, and HEIC images with custom pixels, presets, quality controls, and batch ZIP download.
Drag and drop images here or
Supports JPG, PNG, WebP, SVG, and HEIC where your browser supports decoding. Limit: 500 files or 2 GB total.
Good for
- Changing image dimensions for websites, blogs, landing pages, stores, forms, school portals, job applications, and email attachments.
- Using exact pixel sizes, percent scaling, longest-side resizing, shortest-side resizing, social presets, and batch image resize workflows.
- Preparing JPG, PNG, WebP, SVG, and HEIC images before compression, WebP conversion, cropping, or PDF creation.
- Exporting resized files together as a ZIP when several photos, screenshots, thumbnails, or product images need the same settings.
Privacy note: this resize workflow is designed for browser-side processing where supported. Keep your original files until you review the resized output and confirm the dimensions, clarity, and format are right for your destination.
What is an online image resizer?
An online image resizer changes the pixel dimensions of a photo, screenshot, graphic, or upload image so it fits a specific destination. You might resize image files when a website layout needs a 1200px blog image, a marketplace requires square product photos, an email attachment is too large, or a social platform needs a known size such as 1080x1080, 1080x1920, or 1280x720. ConvertorLab lets you resize JPG, PNG, WebP, SVG, and HEIC images by pixels, percent, longest side, shortest side, or preset size, then export the resized images in the format that works best for your workflow.
Example image resize workflow
If a website asks for smaller product photos but your camera exported very large images, resize the dimensions first, then compress only if the final file still exceeds the upload limit.
This flow is useful for image resizer online searches such as resize image in pixels, resize photo for website, batch resize images, change image dimensions, and resize image without stretching.
Common use cases
- Resize photo dimensions for websites, blog posts, hero images, thumbnails, and ecommerce product cards.
- Resize JPG and PNG images before uploading to forms, school portals, job applications, CRM systems, or client delivery tools.
- Resize images for Instagram, Facebook, YouTube thumbnails, LinkedIn posts, Pinterest pins, wallpapers, icons, and display ads.
- Batch resize images when a folder of screenshots, photos, or product images needs the same width, height, or longest-side limit.
- Reduce dimensions first, then use compression when the resized result still needs to meet a file-size requirement.
Popular resize image tasks
- Use resize image online free when you need a quick browser tool without installing desktop software.
- Use resize image by pixels for exact width and height requirements in upload forms, website CMS fields, or ad platforms.
- Use resize JPG, resize PNG, or resize WebP settings when you want to keep the output close to the original file type.
- Use image size converter settings when you need to change dimensions and output format in the same workflow.
- After resizing, open Compress JPG, Compress PNG, or Image to WebP if the file still needs another pass.
Features
- Resize JPG, PNG, WebP, SVG, HEIC, and browser-supported image files.
- Choose presets for social media, video frames, icons, wallpapers, print sizes, and display ads.
- Resize by percent, maximum box, exact cover, longest side, or shortest side.
- Control output format, quality, smoothing, background fill, metadata, and ZIP download.
How to use
- Choose images or drag files into the import panel.
- Select a preset or enter custom width and height in pixels.
- Choose mode, quality, format, and background settings if needed.
- Click Start Resize, then download the ZIP when processing finishes.
Benefits
- Keep the working resizer near the top of the page.
- Prepare upload-ready images without a heavy editor.
- Use one setup for single-image and batch resize workflows.
- Move naturally into crop, compression, WebP conversion, or PDF creation.
How resizing affects image quality
Resizing changes the number of pixels in an image. Reducing dimensions usually makes a file easier to upload and can help page speed, while enlarging a small image can make it look soft because the browser has to create new pixels. For clean results, start from the largest practical source file, keep aspect ratio enabled when you do not want distortion, choose WebP or JPG for photo-like website images, and use PNG when sharp graphics or transparency matter. For deeper technical context, see Google Search Central guidance on image best practices and MDN's Canvas API documentation.
Related guides
Resize image questions
How do I resize an image online for free?
Choose your image, select a preset or enter custom pixel dimensions, choose output settings, then start the resize and download the ZIP when it is ready.
Can I resize JPG, PNG, WebP, SVG, and HEIC images?
Yes. This image resizer accepts common browser-supported image formats including JPG, PNG, WebP, SVG, and HEIC or HEIF where browser conversion support is available.
Can I resize an image by pixels?
Yes. Use width and height fields for custom pixel dimensions, or choose longest side and shortest side modes when only one edge needs a specific size.
Can I batch resize images?
Yes. Add multiple images, apply one resize setup to the batch, then download the resized results as a ZIP file.
What is the best image size for websites?
It depends on the layout. Many blog and content images work well between 800 and 1200 pixels wide, while full-width hero images often need a wider source such as 1600 to 1920 pixels.
Will resizing reduce image file size?
Often yes, especially when you reduce dimensions. Final size also depends on image detail, selected format, quality, metadata, and whether you convert to JPG or WebP.
How do I resize an image without stretching it?
Keep aspect ratio enabled or use Fit mode. Exact Cover mode fills a target size and may crop the image, so use it only when that behavior is intended.
Should I resize before compressing an image?
Resize first when the image dimensions are too large for the destination. Compress after resizing if the file still needs to meet an upload size limit.
Can I resize images for Instagram, YouTube, Facebook, and LinkedIn?
Yes. The preset menu includes common social, video, icon, wallpaper, print, and display ad dimensions so you can start from a practical target size.
Is this browser-side image resizer private?
The resize workflow is designed to run in your browser where supported. Keep the original file until you review the resized output and confirm it fits your upload needs.