Private Image Compression
Compress Image Online
Reduce image file size in seconds while keeping usable quality. Everything runs client-side, so your files stay on your device.
Drop images here or click to upload
Supports JPG, PNG, WebP • Multiple files allowed
What this tool does
Compress Image lowers file size for photos and graphics, helping with faster sharing, web uploads, and smaller attachments.
Who should use it
- Website owners optimizing page load times.
- Job seekers preparing image-heavy applications.
- Anyone sending photos through email or chat with size limits.
Step-by-step usage (Upload -> Process -> Download)
- Upload one or more images and set a compression quality level.
- Process by letting the tool compress each file in-browser.
- Download compressed images one by one or all at once.
Output quality + clear limitations
- Higher quality settings keep more detail but save less space.
- Output format is JPEG, so transparency is not preserved.
- Very small or already optimized images may show limited size reduction.
- Dimensions are retained; this tool adjusts encoding quality, not pixel size.
Privacy explanation (client-side processing)
Compression happens on your device using browser APIs. PDFHarbor does not send image bytes to a remote compression service.
FAQ
Does the image compressor upload my files?
No. Compression happens in your browser, and your original images are not uploaded for processing.
What file types can I compress?
You can select common image files such as JPG, PNG, and WebP in the uploader.
Will the compressed file keep the original format?
Compressed output is currently exported as JPEG. This can remove transparency from PNG files.
Can I compress multiple images at once?
Yes. You can upload multiple files, review results, and download each image or all compressed files.
Why is one image not much smaller after compression?
Some files are already optimized. At high quality levels, additional size reduction may be limited.
Explore related tools
Pair compression with PDF creation and document tools.