Image Tools / Local studio

Batch Image Resizer

Resize up to twenty authorised images to one bounded social or web target and download the copies as a ZIP.

Step 1 / Source

Choose one image

JPEG · PNG · WebP · 20 MB

Drop your images here

Or browse for two to 20 authorised JPEG, PNG, or WebP images in output order.

Browse imageUp to 20 files · 20 MB each · browser processed

Step 2 / Output

Batch Image Resizer controls

One proportional target and export format are applied to every selected image. Smaller sources are never enlarged.

Social size preset

Choose a common publishing canvas, then fine-tune the dimensions if needed.

Width (px)Height (px)

Export quality 82%Higher quality keeps more detail and usually creates a larger file. PNG export ignores this setting.Output format

Create a ZIP of resized imagesEach image is resized independently and named safely inside one archive. The original files remain unchanged.

Keep this page open until the download begins.

01Your images stay on your device

Processed in your browser. No image upload required.

02Working copy released

After download, the preview URL, decoded bitmap, canvas, and selected source reference are cleared.

03Your download remains

Nirmion cannot remove the finished file from your device or browser download history.

Workflow guide

A predictable batch resizing workflow

Prepare a consistent set of social, web, or campaign images without opening a cloud upload.

What you need

Choose one to twenty JPEG, PNG, or WebP files up to 20 MB each. Selection order is retained in the archive.

Social-ready choices

The shared target fits each source proportionally. Check transparent edges, small text, and platform-specific limits before publishing.

What you receive

Receive one ZIP containing independently resized copies. Source files and temporary decoding memory are released after processing.

Decision guide

Create consistent derivatives without flattening the originals

Batch Image Resizer applies one bounded proportional fit to every selected source and packages the independent results for review.

Browser processing avoids a Nirmion upload and keeps the source files on the device during this session. It does not remove copies already stored on your device, backups, shared drives, publishing platforms, or downstream caches, so review the complete handling path before treating the ZIP as a privacy control.

Useful batch resizing scenarios

Prepare a campaign set for one social placement.
Create web-ready review copies from an authorised folder.
Deliver consistently named derivatives in one portable archive.

Good to know

Important image boundaries

Why might a PNG not become smaller?: PNG is lossless and browsers do not expose a quality control for it. Choose WebP or JPEG when reducing file size matters more than exact lossless pixels.
Are animated images supported?: No. The workspace accepts still JPEG, PNG, and WebP files. Re-encoding an animated source would otherwise keep only one frame.
What does clearing the file mean?: Because processing is local, there is no Nirmion server copy to delete. The tab releases its working references after success; your downloaded output remains on your device.