🔎 Image Tools
Image Downscaler — Reduce to 50%, 33% or 25%
Make large images smaller without the jagged, aliased look. This downscaler shrinks your photo with high-quality Lanczos resampling, right in your browser — nothing is uploaded.
✓ Free forever✓ No upload✓ No signup✓ In your browser
Drop an image to downscale
JPG, PNG, WebP · nothing uploaded
📁 Browse image
Quick answer: To downscale an image, drop your JPG, PNG, or WebP above, choose 2×, 3×, or 4×, and click Downscale. The image is reduced with high-quality Lanczos resampling and sharpening right in your browser — nothing is uploaded — and you download the smaller image in seconds.
How to Downscale an Image
1
Add Your Image
Drop a JPG, PNG, or WebP onto the tool, or click to browse.
2
Choose Scale
Pick 2×, 3×, or 4×, and your output format.
3
Downscale
The image is reduced with Lanczos resampling and sharpening, in your browser.
4
Download
Preview the smaller image and download it — full quality, no watermark.
Why Use Convertlo?
- 🔒 100% Private — images never leave your browser
- 🆓 Free forever — no account, no watermark, no limits
- 🔎 Up to 4× — reduce small images for print or display
- ✨ Lanczos + sharpening — crisp results, not blurry scaling
- 🖼️ Keeps transparency — PNG and WebP alpha preserved
- 📱 Works on mobile — any modern browser, any device
Features
100% Private
No server, no upload — images stay on your device.
2×/3×/4×
Reduce with your choice of scale factor.
Lanczos Quality
Professional resampling with a sharpening pass.
Alpha Safe
Transparency preserved with PNG output.
Live Preview
See the reduced image before downloading.
Mobile-Ready
Works on iPhone, Android, tablet, and desktop.
Frequently Asked Questions
Yes — completely free, no limits, no watermarks, and no account required. Convertlo runs entirely in your browser, and your images never leave your device.
It reduces your image using high-quality Lanczos resampling with a sharpening pass — the same professional technique used by photo editors. This produces noticeably cleaner, crisper reducements than the browser's default scaling, without sending anything to a server.
No. All upscaling happens locally in your browser using the HTML canvas and the Pica resampling library. Your images never leave your device, so there is no file-size limit and nothing is stored anywhere.
Downscaling discards pixels, but high-quality Lanczos resampling keeps the smaller image crisp and free of the jagged edges you get from naive scaling. It is ideal for shrinking photos for web, email, or thumbnails while keeping them sharp.
You can reduce an image to 50%, 33%, or 25% of its original dimensions. Downscaling always makes the file smaller and lighter, so there are no size limits.
JPG, PNG, and WebP are all supported. Choose PNG output to keep transparency and maximum quality, or JPG for a smaller file.