Advanced image studio

Resize precisely.
Compress with control.

Choose a resampling filter, output size, format, and quality. Process up to 25 images in one batch.

Drop images here or click to browse JPG · PNG · WebP · AVIF · BMP

A focused image workflow

Resize first. Encode to your needs.

Compressy separates two decisions that affect an image in different ways. A resampling filter determines how pixels are reconstructed when dimensions change; the output format and quality determine how the new image is encoded. Set them once, then apply the same choices to a batch of up to 25 images.

Websites and product pages

Prepare consistent image dimensions for product listings, landing pages, blog articles, and responsive layouts. Use WebP for a compact web-ready output, or JPEG when broad compatibility is the priority.

Thumbnails and content libraries

Resize image sets for galleries, previews, and content management systems without editing each file separately. The batch summary makes it easy to compare the original files with the exported set.

Pixel art and crisp graphics

Choose Nearest Neighbor when you need hard pixel edges to stay crisp, or use a cubic or Lanczos filter for photographic material where smooth reconstruction matters more.

Resampling guide

What each filter is good at

Lanczos-3 Balanced detail

A strong general-purpose choice for detailed photos and downscaling. It can preserve fine detail and perceived sharpness, though high-contrast edges may show slight ringing.

Bicubic Sharper cubic filter

Uses a Catmull–Rom-style cubic reconstruction. It can produce a crisp result for photos and illustrations, with a little more edge emphasis than smoother cubic filters.

Mitchell–Netravali Smoother reconstruction

A cubic filter designed to balance sharpness and smoothness. Try it when Lanczos looks too crisp or introduces visible halos around edges.

Bilinear Simple and soft

Interpolates between nearby pixels and is generally softer than the higher-order filters. It can suit quick, modest resizes when extra edge detail is not needed.

Nearest Neighbor Hard pixel edges

Select individual source pixels without smoothing. It is useful for pixel art and deliberately blocky graphics, but usually unsuitable for photographs.

Output choices

Choose the right format

WebP is a practical default for websites and supports transparency. JPEG is widely compatible and well suited to photographs, but it does not preserve transparency. PNG keeps lossless image data and transparency, though the resulting file may be larger; the quality setting is not applied to PNG.

Resizing or re-encoding will not always reduce file size. Upscaling, high quality settings, and some format changes can produce a larger output, so compare the before-and-after totals before downloading.

FAQ

A few practical answers

Are images uploaded to a server?

No image contents are sent to a file-processing server. Decoding, resampling, and encoding run in a browser Web Worker on your device. The website still loads its page assets and fonts normally.

Can I process 25 large images at once?

You can add up to 25 images, but actual capacity depends on image dimensions, graphics limits, and available memory. Compressy processes one image at a time and rejects individual images above its 40-megapixel safety limit.

Does resampling itself compress the file?

No. Resampling changes pixel dimensions and reconstructs image pixels. Encoding then stores that output in WebP, JPEG, or PNG; format and quality affect the stored file size.