Bulk Image Resizer

Process images in your browser, compare actual results and download individual files or a ZIP.

Choose your settings

Images (20 files / 40 MB maximum)

Resize using

Common social image canvas sizesSocial preset fit

General-purpose canvas sizes, not a promise of current platform requirements. Social preset mode uses the fit/crop choice below, without stretching.

Width

Height

DPI used to calculate pixels

Pixels = inches × DPI. 1 inch = 2.54 cm = 25.4 mm. This calculates pixel dimensions only; canvas exports may carry 96 DPI metadata. Set the intended print size in your print app.

Fit inside width/height and keep aspect ratio

Optional target size per image (KB)

0 means no fixed target. Here 1 KB = 1,000 bytes. JPEG/WebP only; target and savings are not guaranteed.

Output formatJPEG / WebP quality (1-100)

Quality does not change PNG compression. PNG optimization is a separate upcoming milestone, not this re-encode.

JPEG background for transparent areas

Files stay on your device. No upload.

Outputs

Before you start

JPG, PNG and WebP are the supported still-image workflow. BMP and static GIF decoding depends on the browser. Animation, EXIF/location data, colour profiles and print metadata are not preserved. HEIC, TIFF and AVIF are not enabled in this milestone.

Resize and enlarge

Ordinary image interpolation, not AI detail reconstruction. Enlarging can blur a photo. Fit mode stays inside the requested box; unlock aspect ratio only if stretching is acceptable.

Resize image to 100KB?

Pixel dimensions and file size are different. Use the image compressor target workflow to try 100 KB; changing width and height alone does not guarantee a KB limit. This free image resizer changes pixels, while the bulk image compressor reports actual size.

Compression is not a guarantee

Already-small images may become larger, particularly after format conversion. Actual input/output sizes are shown. Check readability before replacing your original.

Device limits

At most 20 images, 40 MB combined, 24 million pixels per input, 12 million pixels per output and 100 million input pixels per batch. A low-memory phone can still fail. A stopped batch keeps only completed outputs.

Privacy

Processing and ZIP generation happen in this browser. No paid API, sign-up or image upload. ZIP stores already encoded images without claiming further file-size savings.

Bulk Image Resizer

Choose your settings

Outputs

Resize multiple images