Reduce an image's file size or pixel dimensions using the available resize modes. Choose an automatic balanced reduction, work toward a file-size limit, or set width and height when exact dimensions matter.
or drop one image here
One JPG or PNG up to 25 MiB
Target from 5 KB to 5 000 KB
Yes. A successful Target KB result is at or below the requested value, but an exact byte count is not guaranteed.
Yes. Enter explicit pixel dimensions, optionally keep the aspect ratio locked, and choose whether smaller images may be enlarged.
Smart Reduce keeps the decoded dimensions, tries balanced JPEG encoding, and returns the untouched source file when re-encoding would not make it smaller.
Target KB and Width & Height create JPEG files. Smart Reduce may return the untouched original file, including PNG, when re-encoding would not make it smaller.
Reducing dimensions or re-encoding an image can change visible quality. The amount depends on the resize mode and source image.
No. Selected image contents are processed locally in this browser.
Behöver du en annan dokumentuppgift? JPG till PDF.
Image Resizer provides different controls for different constraints. Use file-size reduction for upload limits and dimension controls when the destination specifies pixels.
An image resizer in KB solves a different problem from changing width and height. PDFKaka supports both: choose a maximum file size for an upload portal, or set pixel dimensions for a form, website, profile, or document. The output is generated locally as a JPEG.
Choose a common preset or enter another maximum. The tool searches for the best practical JPEG quality and reduces dimensions only when the original image cannot meet the target through quality adjustment alone.
Use dimension mode when a portal specifies width, height, or aspect ratio. Keeping the aspect ratio prevents accidental stretching, while the no-enlarge option protects smaller originals.
Very small targets can blur faces, document text, signatures, and fine edges. Review the downloaded image at full size and use a larger limit when essential detail becomes unclear.
The result is kept at or below the maximum, not padded to an exact byte count. Browser JPEG encoders can produce slightly different sizes.
Yes, but the output is JPEG. JPEG does not support transparency, so transparent PNG areas are flattened.
The current tool is designed to reduce file size or change dimensions. It does not provide a minimum-KB or exact-KB target, and artificially increasing bytes would not improve image detail.