Resize Image
Resize images in batch.
Arrastra tus imágenes o haz click — JPG, PNG, WebP, GIF…
Máx 47.68 MB por archivo
How do you resize an image online without uploading it?
Docuboxer's image resizer changes the dimensions of your images directly in your browser — no upload, no signup, no watermark. Set an exact width and height in pixels or scale by a percentage, and lock the aspect ratio so nothing gets stretched or squashed. It handles batches too: load a folder's worth of images, apply the same dimensions to all of them, and download them individually or together as a ZIP. Because the resizing runs in your device's memory rather than on a server, your photos never travel across the internet, and the tool keeps working offline once the page has loaded. That makes it a fast, private way to prepare product photos for marketplaces, avatars for social profiles, or email-friendly versions of large camera shots — without installing an editor or trusting a cloud converter with your pictures.
How to use Resize Image
- Load one or more images you want to resize by dragging them into the upload zone.
- Set the new width and height in pixels, or pick a scale percentage. Turn on the aspect-ratio lock to avoid distortion.
- Process the images and download each one individually, or grab them all together in a ZIP file.
Common use cases
Prepare product photos for marketplaces
Resize product photography to the exact dimensions Amazon, eBay, Shopify or Etsy require, so your listings meet each platform's publishing specs.
Fit profile pictures and social media sizes
Adjust images to the specific sizes for avatars, covers and posts on LinkedIn, Facebook, X and Instagram without losing proportion or visual quality.
Batch-resize whole photo sets
Apply the same dimensions to dozens of images in one pass — ideal for catalogs, galleries and image sets that must be consistent.
Shrink camera photos for email and docs
Scale down multi-megapixel camera shots to sensible dimensions before embedding them in documents, presentations or email attachments.
Resize private images without the cloud
Everything runs locally in your browser, so ID photos, client assets and personal pictures never touch a third-party server.
Frequently asked questions
How do I resize an image online for free?
Drop the image into the tool, type the target width and height (or a percentage), and download the result. Free, no signup, no watermark — and the image is processed in your browser, never uploaded.
What happens if I don't keep the original aspect ratio?
If you turn off the aspect-ratio lock, the image will be stretched or squeezed to fit the exact dimensions you enter, which can cause visible distortion. We recommend keeping the lock on unless you specifically need exact non-proportional dimensions.
Can I resize many images to the same dimensions at once?
Yes. Load a whole batch and apply the same dimensions to all of them in one operation. Each image is processed locally in your browser, in parallel.
Does resizing reduce image quality?
Scaling down is visually safe — detail is resampled cleanly to the smaller size. Scaling up cannot invent detail that was never captured, so avoid enlarging images far beyond their original dimensions.
Can I resize images offline?
Yes. Docuboxer works offline: once the page has loaded, you don't need an internet connection to process your images.
Are my images uploaded to a server?
No. Resizing happens entirely in your browser's memory. No server, log or backup ever sees your images, and closing the tab leaves no trace.