Use this free bulk image resizer to resize multiple images to the same dimensions in one go. Select your files, choose a platform preset or enter custom dimensions, and download all resized images instantly — no software installation or account required.
Click to upload or drag & drop multiple images
PNG, JPG, WEBP — select as many as you need
Resizing images one by one is one of those tasks that sounds quick until you actually have to do 30 of them. If you batch upload to multiple platforms, run a blog with lots of images, or regularly need to create thumbnails at specific sizes, doing them individually wastes real time. This tool lets you resize a batch of images at once in your browser.
Everything processes locally — no files are uploaded to any server. You can set target dimensions, drop in all your images, and download the resized versions. It works with JPEG, PNG and WebP files.
Step 1 — Set your target width and height. Enter the dimensions you need. If you're resizing for YouTube thumbnails, that's 1280x720. For Instagram feed posts at 4:5 portrait, it's 1080x1350. Check the aspect ratio tool if you're not sure what dimensions your platform expects.
Step 2 — Drop in all your images at once. Drag and drop your images or click to select multiple files. The tool will process all of them at the same target size.
Step 3 — Download the resized images. Once processed, download each image individually or download all as a zip. The originals are not changed — the resized versions are created separately.
Resizing to a larger size than the original. Scaling an image up doesn't add detail — it stretches the existing pixels and the result looks blurry. You can only reliably make images smaller, not larger. Always start with the highest-resolution version you have.
Ignoring the aspect ratio when resizing. If your original image is 16:9 and you resize to a square without cropping, it will look squished. Use the aspect ratio tool to check dimensions before batch resizing, and make sure your target dimensions match the ratio of your originals if you want to avoid distortion.
Not keeping the originals. Always resize a copy, never the original file. Once you've reduced an image's resolution you can't undo it. Keep your originals in a separate folder and always work from those.
1280x720 pixels at 72 DPI, saved as JPEG under 2MB. This is the minimum size YouTube recommends. Higher resolution (like 1920x1080) also works and may look crisper on high-DPI screens.
Square: 1080x1080. Portrait (recommended): 1080x1350. Landscape: 1080x566. Reels and Stories: 1080x1920. Portrait posts take up more screen space in the feed and often get higher engagement.
Resizing down generally maintains quality well — the image just has fewer pixels. Resizing up causes visible quality loss because you're stretching pixels. For best results, always resize from a large original.
Yes — the tool runs in your browser and works on mobile, though drag-and-drop may not be available on all mobile browsers. Use the file picker instead.
A grid of images all at different sizes and aspect ratios looks unprofessional and breaks layout on most platforms. Batch resizing all your images to the same dimensions before uploading ensures consistent presentation across your website, social profiles and content library.