No sign-up · Secure · To your target size

Bulk image compression

Drop multiple files or a ZIP archive — Sevio compresses the whole batch at once and gives you a single ZIP back. Drag in dozens of shots together, pick one setting for the entire batch, and download the result as one archive. JPG, PNG, WebP, AVIF, HEIC; up to 30 files per run.

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

JPGPNGWebPAVIFHEIC

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

Auto mode

Maximum compression with no visible quality loss.

Reduce resolution / quality if needed

If basic compression saves less than 20%, we'll lower the quality (applies to all files). Resolution is reduced separately, and only for images wider than 2560 px. Aspect ratio is preserved.

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.

A folder or a ZIP — either works

Drag in dozens of photos at once or upload a ZIP archive — Sevio unpacks it right in the browser, processes every image and packs the result back into a single ZIP. Handy for product catalogs, screenshot sets and phone photos when compressing files one by one would take forever.

One setting for the whole batch

Choose the mode once: “no visible quality loss” or “to an exact size in KB” — and it applies to every file in the batch at once. PNG images can be converted to WebP in bulk, which weighs 5–10× less. No need to configure each file separately.

Nothing gets lost

A table shows the progress and the savings for each file. The previous batch stays available for about an hour — if you close the tab by accident, there is no need to upload everything again. Files on the server are deleted automatically, and there are no third-party trackers.

Frequently asked questions

Up to 20 files / 30 MB as a guest and up to 30 files / 50 MB with a verified account; the per-file limit is 50 MB.

Yes. The archive is unpacked right in the browser, every image is compressed, and the result is packed back into a single ZIP to download.

Yes, the chosen mode and format apply to the whole batch; PNG files can be converted to WebP in bulk if you want.

Each file keeps its own format (HEIC/HEIF are converted to JPG for compatibility); mixed formats in one batch are supported.

The previous batch stays available for about an hour, after which the files and links are deleted automatically.