| File | Original | Compressed | Saved |
|---|
Image Compressor — Reduce Image File Size Without Losing Quality
An image compressor reduces the file size of your photos and graphics so they load faster on websites, take less storage space, and are easier to share via email or messaging apps. Our free online compressor uses advanced algorithms to shrink file sizes while preserving visual quality.
Unlike tools that upload your images to remote servers, this compressor runs entirely in your browser. Your images are never uploaded, stored, or transmitted anywhere. This makes it completely private and secure — ideal for sensitive photos, documents, or personal images.
You can compress multiple images at once (batch mode), choose an output format (JPG, WebP, or PNG), set a quality level, resize to maximum dimensions, or even specify a target file size in KB. A side-by-side preview shows you exactly how much space you've saved.
How to Compress an Image
-
Upload your image(s) Drag and drop one or more images onto the upload area, or click to browse. We support PNG, JPG, WebP, BMP, and GIF formats.
-
Choose your settings Select an output format (or keep original), adjust the quality slider, optionally set max dimensions or a target file size in KB.
-
Compress Click the "Compress" button. Compression happens instantly in your browser. A preview shows the original vs compressed versions with file sizes.
-
Download Review the results and click "Download" to save your compressed image(s). For batch mode, all files download as a summary.
Frequently Asked Questions
No, never. All image compression happens entirely in your browser using the HTML5 Canvas API. Your images are never uploaded, stored, or transmitted anywhere — making this tool completely private and secure.
The quality slider directly controls the compression level — lower values produce smaller files but more visual artifacts. The target file size option uses binary search to find the best quality setting that achieves your desired file size. If you set both, the target file size takes priority.
WebP offers the best compression — typically 25-35% smaller than JPG at equivalent quality. JPG is the most widely supported format and works great for photos. PNG is lossless and best for graphics with sharp edges or transparency. Choose "Keep original" to compress without changing the format.
Yes! Drop multiple images into the upload area and they'll all be compressed with the same settings. A batch results table shows the file size savings for each image, plus the total saved across all files.
There are no artificial limits imposed by the tool. However, very large images (e.g., 20,000+ pixel dimensions) may cause performance issues in your browser's Canvas API since all processing is done in memory. For typical photos and web graphics, the compressor handles them with ease.
Related Tools
Try these other free tools from our collection.