Image Resizer
Resize one or many images by exact dimensions or percentage, with optional aspect-ratio lock and a live before/after preview. Batch resize and download everything as a ZIP — all processed locally in your browser, never uploaded.
How to use Image Resizer: Open Image Resizer — no sign-up or software download is required. Drag and drop your file(s) into the tool, or click to browse and select them from your device. Choose any options you need, such as order, quality, page range or output format. Everything runs inside your browser, so your data never leaves your device.
Click to browse, drop, or paste images
Batch supported — add as many images as you like. Processed locally; never uploaded.
Resize one or many images by exact dimensions or percentage, with optional aspect-ratio lock and a live before/after preview. Batch resize and download everything as a ZIP — all processed locally in your browser, never uploaded. Image Resizer is a free, browser-based tool in the Filevane image tools collection — there is nothing to install, no account to create and no watermark on your results. It works on desktop, tablet and mobile, and because the work happens on your own device it stays fast even with large inputs.
How to use Image Resizer
- Open Image Resizer — no sign-up or software download is required.
- Drag and drop your file(s) into the tool, or click to browse and select them from your device.
- Choose any options you need, such as order, quality, page range or output format.
- Click the action button and let the tool process everything locally in your browser.
- Download the finished file. Your originals are never changed or uploaded.
Why use Image Resizer?
- 100% free with no limits, no sign-up and no watermarks.
- Private by design — your files are processed in your browser and never uploaded to a server.
- Fast and lightweight, with instant results even on a phone or a slow connection.
- Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
- Part of a full image tools suite, so related image resizer tasks are one click away.
Is it private and secure?
Your privacy is built in. Image Resizer does all processing on your own device using client-side code, so your files are never transmitted, stored or seen by anyone — including us.
Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.
You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.
Learn more
Image Optimization: Compress, Resize and Convert — Faster pages and smaller files start with good images. Learn how to compress, resize and convert images without wrecking quality.
Frequently asked questions
Are my images uploaded to a server?
No. Resizing happens entirely in your browser using the Canvas API — your images never leave your device, which keeps them private and makes the tool instant.
Can I resize many images at once?
Yes. Add as many images as you like; the same settings apply to all of them and you can download the whole batch as a single ZIP.
Will resizing reduce quality?
Shrinking uses high-quality smoothing so results stay crisp. For lossy formats like JPEG or WEBP you can also set the quality; PNG stays lossless.
Does it keep the aspect ratio?
By default yes — enter one dimension and the other is calculated automatically. Turn off ‘Maintain aspect ratio’ to stretch to exact width and height.
Related tools
See all free image tools or browse the full tool catalogue.