usefulweb.site Batch Image Resizer & Cropper

Audio, video & images

Batch Image Resizer & Cropper

Resize or crop up to 30 images at once: exact size, fit, percentage or 1:1, 4:5, 16:9, 9:16.

One image (JPG, PNG, WebP, AVIF, GIF, TIFF, HEIC) or a ZIP with up to 30 images, max 50 MB per image and 150 MB in total. Your browser form sends one file, so put several images into a ZIP.

px

Needed for "Exact size"; for "Fit" give width, height or both.

px
%

Only for "Scale by percentage".

Only for "Crop to aspect ratio".

Which part of the image is kept when cropping.

For JPG, WebP and AVIF.

Try an example: Two images in a ZIP → 1:1 squares, WebP · Single image → exactly 32×32 px

How it works

Upload one image or a ZIP with up to 30 images and resize them all the same way: to an exact size (cropped to fill, with a chosen focus point), to fit within a box, by percentage, or cropped to a social-media aspect ratio. Choose the output format and quality and download everything as one ZIP with a per-file report.

  • Each file in the upload (or ZIP) is identified by its content; files that are not supported images are listed as skipped. The ZIP is read in memory with limits (30 images, 50 MB each, no encrypted or ZIP64 archives).
  • Every image is first turned upright using its EXIF orientation. Fit: scaled so it fits inside the box (never enlarged unless allowed). Exact size: scaled to cover the box, then cropped around the chosen focus. Percentage: scaled by the factor. Aspect ratio: the largest centred (or focused) crop with that ratio, then optionally fitted into the box.
  • Scaling uses ImageMagick's default high-quality filter (Lanczos when shrinking photos, Mitchell when enlarging). WebP is encoded with cwebp and AVIF with avifenc when installed.
  • Metadata is removed unless you keep it; when kept, exiftool copies it back and resets the orientation tag. The ZIP is built with fixed timestamps so the same input gives the same file.

Cropping removes parts of the picture; check the preview before publishing.

For scripts and AI agents

  • JSON API: POST https://batchimageresizer.usefulweb.site/api/v1/calculate (same calculation as this page)
  • Interface description: OpenAPI 3.1 · AI guide: llms.txt
  • MCP server (Streamable HTTP): https://batchimageresizer.usefulweb.site/mcp · tool name batch_image_resizer
Example request
curl -s -X POST https://batchimageresizer.usefulweb.site/api/v1/calculate \
  -H 'content-type: application/json' \
  -d '{…see OpenAPI examples…}'

Related tools

  • Image Compressor – Shrink JPG, PNG, WebP, AVIF or GIF images: convert, resize, strip metadata and compare sizes.
  • Batch Watermark Studio – Add a text or logo watermark to up to 30 images at once: position, tiling, opacity and angle.
  • HEIC/RAW Image Converter – Convert iPhone HEIC, AVIF and camera RAW (CR2, CR3, NEF, ARW, DNG…) to JPG, PNG or WebP.
Feedback