Image Batch Resizer

Resize a folder of images in your browser. Nothing is uploaded.

Source

Select a folder (or individual images). Only files in the folder root are loaded.

Resize

Pick a resize mode and value, then preview the first image.

Maximum output size: 4096 × 4096 px

Export

Save resized copies locally. Chrome and Edge can write to a folder; other browsers download a ZIP.

Loaded source images (original size thumbnails).

0 images loaded

Click Select Source Folder to load JPEG, PNG, and WebP images.

What is Image Batch Resizer?

Image Batch Resizer is a small browser tool for resizing many photos at once. Choose a folder, set a target width or a percentage, preview the first image, then save the results. Processing runs on your computer; the files are not sent to a server.

How to use

  1. Click Select Source Folder (or Select Images if your browser cannot open a folder).
  2. Choose Exact Pixel Width or Percentage Ratio and enter a value. Output cannot exceed 4096 × 4096 px.
  3. Click Preview to see the first image at the new size. Preview does not save a file.
  4. Export with Save to Folder when your browser supports it, or Download ZIP.

Supported formats

This web version reads, resizes, and exports JPEG/JPG, PNG, and WebP.

  • Original filenames and extensions are kept for those formats.
  • PNG and WebP transparency is preserved where the source has an alpha channel.
  • JPEG output is RGB (no alpha).
  • GIF, BMP, and TIFF are skipped. They are not rewritten with a different codec or a misleading extension.
  • Only files directly in the selected folder are processed. Nested subfolders are skipped and counted.

Privacy

Image processing happens locally in your browser. Selected images are not uploaded to our server.

See the Privacy page for the same statement in more detail.

FAQ

Are my images uploaded?

No. The page loads its own HTML, CSS, and JavaScript. Selected image bytes stay in the browser and are not posted to an application server.

Does resizing preserve aspect ratio?

Yes. Exact width calculates height from the original ratio. Percentage scales width and height together. Each result dimension is at least 1 pixel. If a requested size would exceed 4096 × 4096 px, the result is scaled down proportionally to fit.

What is the maximum output size?

4096 × 4096 px. Target width cannot be greater than 4096. Percentage resizes that would exceed that bound are reduced to fit, without changing the aspect ratio.

What image formats are supported?

JPEG/JPG, PNG, and WebP. GIF, BMP, TIFF, and other types are skipped and reported in the status text.

Why does my browser download a ZIP instead of saving directly to a folder?

Writing into a folder you pick uses the File System Access API, which Chrome and Edge support. Safari, Firefox, and similar browsers download resized-images.zip instead.

Does resizing preserve EXIF/metadata?

No. Exported files are newly encoded images. Camera EXIF and other metadata are not copied.