Compress Image

Compression re-encodes a photo so it takes up less storage space and uploads faster, without necessarily changing its pixel dimensions. This matters for email attachments with size limits, website images that need to load quickly, and phone photo libraries that are running out of storage. The tool applies quality presets for JPG and WebP, formats built for this kind of shrinking, while output format starts from your first uploaded file so PNG transparency isn't dropped by default.

Website owners shrinking photos so pages load faster, people sending photos over email or messaging apps with attachment limits, real estate agents and online sellers preparing listing photos, and anyone archiving a large phone photo library who wants smaller files without opening a dedicated editor.

High keeps the most visual detail and the largest file size. Medium is a balanced default for most photos. Low gives the smallest files but shows more visible compression, especially in areas with fine detail.

PNG is lossless in this tool, so compressing it mostly removes minor redundancy rather than image data. Switch the output to JPG or WebP when a smaller file size matters more than pixel-perfect quality.

Yes. Compression happens locally in your browser using canvas re-encoding. Your images are not uploaded to Justools.

Yes. Add several images and the compressed outputs are bundled into one ZIP file so you get a single download instead of many pop-ups.

Re-encoding through canvas usually removes common image metadata as a side effect. If removing EXIF and GPS data is the actual goal, use Remove Photo Metadata instead, which is built specifically for that.

Compress Image keeps the same pixel dimensions and shrinks file size through quality settings. Resize Image changes width and height first, which often reduces size too. Use Resize when you need a specific size, Compress when the file just needs to be smaller.