Compress Image Online — Reduce File Size for Free
Large image files slow down websites, bloat email attachments, and eat into upload limits on forms and marketplaces. This tool compresses JPG, PNG, and WebP images directly in your browser, shrinking file size while keeping the image visually sharp — no server round-trip, no upload wait.
JPG, PNG, WebP, HEIC, SVG · processed entirely on your device
Compress Image Online — Reduce File Size for Free
Large image files slow down websites, bloat email attachments, and eat into upload limits on forms and marketplaces. This tool compresses JPG, PNG, and WebP images directly in your browser, shrinking file size while keeping the image visually sharp — no server round-trip, no upload wait.
You control the trade-off with two settings above the dropzone: a quality slider, which balances smaller files against visual sharpness, and an optional target size in megabytes. If you set a target size, the compressor will prioritize hitting that size over the quality slider; leave it blank to compress purely by quality instead. For most web images, a quality setting between 70-85% cuts file size dramatically with no visible difference.
Compression happens using your device's own processing power via a background web worker, so your browser tab stays responsive even on larger batches. Drop in one image or several at once — multiple files are compressed independently and bundled into a single zip download. Because nothing is ever uploaded, this works even on a slow or offline connection once the page has loaded, and there's no limit on how many images or how often you use it.
Common questions
It depends on the source image and quality setting, but savings of 50-80% are common for typical JPG and PNG photos without a noticeable drop in visual quality.
The quality slider controls compression strength directly — lower values mean smaller files but more visible artifacts. The target size field instead asks the tool to aim for a specific file size in MB, adjusting quality automatically to get close to it.
This tool supports JPG, PNG, and WebP. For other formats like HEIC or AVIF, convert to one of these first using our conversion tools, then compress.
No — compression preserves the PNG's transparency channel. Only the pixel data is re-encoded more efficiently; the alpha channel stays intact.
Entirely on your device. The tool uses a background web worker in your browser to compress images locally, so files are never uploaded anywhere.