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Resize Images

Resize images to exact dimensions for web, social media, or any use case. Process images privately in your browser.

Free · No account · No uploads
Upload files or drag and drop

JPEG, PNG, WebP, HEIC

Max 10 images · 5MB each

Format

One file per format

Quality

Best quality

Smaller
Best quality80%

Resize for

Optional

Serving images at the right dimensions is one of the biggest bandwidth savings you can make. A 4000px photo displayed at 800px wastes over 90% of the data transferred. Resizing to match your display size eliminates this waste.

Pikkx's viewport presets make it easy to generate multiple sizes for responsive images. Process a batch of images and get mobile, tablet, and desktop versions in one step — ready for srcset attributes or responsive CSS.

All resizing happens in your browser using WebAssembly. Your images are processed locally on your device, never uploaded to any server. The resizing algorithm maintains aspect ratio and uses high-quality downsampling.

Frequently Asked Questions

How does resizing work?+
Pikkx uses viewport presets to resize images. Select mobile (375px), tablet (768px), or desktop (1920px) to resize images to match common screen widths. The aspect ratio is maintained automatically — images are never stretched or distorted.
Can I resize and compress at the same time?+
Yes. Pikkx resizes and compresses in a single step. Select your target viewport(s), choose the output format, adjust quality, and process. You get resized and compressed images in one operation.
Will resizing reduce image quality?+
Downsizing (making smaller) preserves quality well. Pikkx uses high-quality resampling algorithms. Upsizing (making larger) is not supported because it would create blurry results — it's better to start with a larger source image.
What dimensions should I use for web images?+
For most websites: 1200-1920px wide for full-width hero images, 800px for content images, and 400px for thumbnails. Pikkx's viewport presets (mobile, tablet, desktop) cover most common use cases.