HandyArchiveBatch image compressor for Windows
Compressa 1.0
Compressa is a batch image compressor for Windows 10 and Windows 11 (64-bit) that shrinks hundreds of photos or a whole folder in one pass, with smaller files processed first so results start appearing right away on your PC.
Five compression modes cover every use case: Auto for a simple quality slider, Target File Size to hit an exact KB or MB, Reduce to % for a share of the original size, Lossless to re-pack without changing a single pixel, and Smart (on by default), which compares each result to the source with an SSIM measurement and stops the moment the difference would be invisible to the eye.
Compressa reads and writes JPEG, PNG, WebP, HEIC and AVIF for conversion. A file can be kept in its original format and simply shrunk, or converted to a more efficient format such as WebP or HEIC to save even more space. A live before/after preview with a draggable split view and an estimated output size lets you judge the trade-off before anything is written to disk.
Resize and convert in a single pass by width, height, long or short side, or percentage - images are only ever made smaller, never enlarged. One-click presets for Web, Email, Social, Archive and Lossless set the format, mode and resizing together, and custom presets can be saved for recurring work.
Watch folders let Compressa optimize new images on your Windows PC automatically as they arrive, keeping a screenshots directory or an incoming network share optimized without opening the app. EXIF date, camera, GPS and copyright tags can be kept or dropped independently, and ICC color profiles can be stripped for the leanest possible file. Every source image is backed up before it is replaced, and the output is never larger than the original.
Five compression modes cover every use case: Auto for a simple quality slider, Target File Size to hit an exact KB or MB, Reduce to % for a share of the original size, Lossless to re-pack without changing a single pixel, and Smart (on by default), which compares each result to the source with an SSIM measurement and stops the moment the difference would be invisible to the eye.
Compressa reads and writes JPEG, PNG, WebP, HEIC and AVIF for conversion. A file can be kept in its original format and simply shrunk, or converted to a more efficient format such as WebP or HEIC to save even more space. A live before/after preview with a draggable split view and an estimated output size lets you judge the trade-off before anything is written to disk.
Resize and convert in a single pass by width, height, long or short side, or percentage - images are only ever made smaller, never enlarged. One-click presets for Web, Email, Social, Archive and Lossless set the format, mode and resizing together, and custom presets can be saved for recurring work.
Watch folders let Compressa optimize new images on your Windows PC automatically as they arrive, keeping a screenshots directory or an incoming network share optimized without opening the app. EXIF date, camera, GPS and copyright tags can be kept or dropped independently, and ICC color profiles can be stripped for the leanest possible file. Every source image is backed up before it is replaced, and the output is never larger than the original.