Compress images without losing quality
Compressing a photo without losing quality means reducing the file size so the difference is visually unnoticeable. Sevio uses soft compression at 90% quality: the file becomes 30–60% lighter while staying visually indistinguishable from the original, even on a large screen. No sign-up, processed in seconds.
Upload up to 20 images at once with a total size of up to 30 MB — completely free, no sign-up required. Create an account or to compress up to 30 images with a total size of up to 50 MB.
Drop files here
individual images or a ZIP archive with images
JPG, JPEG, WebP up to 20 MB are processed instantly in the browser. Larger files and PNG, AVIF, HEIC formats are processed on the server.
Compression mode
applies to all files
Maximum compression with no visible quality loss.
How it works
- 1
Drop your images or pick files — a ZIP archive works too.
- 2
Choose the compression mode and, if needed, a target size.
- 3
Download the results one by one or as a single ZIP.
“Without losing quality” vs. lossless — the difference
In everyday use, “compress without losing quality” means making the file lighter so that no difference is visible. Technically that is lossy compression: some data is discarded, but at 90% quality the result cannot be told apart from the original by eye.
True lossless compression keeps every pixel but barely reduces the weight of photographs — it is effective mainly for PNG graphics with flat colors. For photos, the practical choice is visually lossless compression; save true lossless for logos and screenshots.