How to compress an image — in 3 steps
- 1. Add your photos. Drop in one or many JPG, PNG or WebP images.
- 2. Pick a size. Choose a target such as under 200KB, and resize if you like. Leave it on "No limit" to simply optimize.
- 3. Download. Save each image, or grab them all as one ZIP.
Hit an upload limit?
Job portals, school systems and government forms often cap photos at 100KB or 200KB. Pick that size and SlimIO finds the highest quality that fits — first by adjusting JPEG quality, then by scaling down only if it has to.
ID and passport photos
The 3×4 cm and 3.5×4.5 cm presets crop the photo to the standard shape and scale it to the pixel size most online forms expect. A frame appears on your photo: drag it onto your face and zoom until your head fills the dashed guide. For a dedicated walkthrough, see the ID photo resizer.
Private by default
Everything happens in your browser, so photos are never uploaded. Re-encoding also strips hidden EXIF data such as GPS location and camera details — handy before posting a photo online. Need to put the photos in a document? Use JPG to PDF, then compress the PDF.
