Reduce your image file size by up to 90% without any visible quality loss. Works instantly in your browser — no upload, no account needed.
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Choose ImageJPG, PNG, WebP · Max 5MB
Compressing your image...
This tool reduces the file size of JPG, PNG and WebP images while keeping them looking sharp. It works by re-encoding the image data more efficiently — for JPG and WebP, it adjusts compression quality to remove data the human eye barely notices; for PNG, it applies lossless optimisation that shrinks the file without changing a single pixel. The result is a smaller file that loads faster, uploads more easily, and takes up less storage, without a visible drop in quality at normal viewing sizes.
Large image files cause real problems. Websites with uncompressed images load slowly, which hurts both user experience and search rankings — Google's Core Web Vitals specifically measure how quickly visual content appears on screen. Email systems often reject or strip attachments over a certain size. Messaging apps like WhatsApp aggressively re-compress large photos themselves, often producing worse results than compressing the image yourself first. And if you're uploading dozens of product photos to an online store, smaller files mean faster page loads across your entire catalogue.
The whole process happens locally in your browser using JavaScript — your image is never uploaded to a server, processed remotely, or stored anywhere. This makes the tool fast (no upload wait) and private (nothing leaves your device).
JPG uses lossy compression, which means it can achieve dramatic size reductions — often 70-90% smaller — by selectively discarding image data that's least noticeable to the eye. This makes it ideal for photographs. PNG uses lossless compression, preserving every pixel exactly; it compresses well for images with flat colours, text, or transparency, but won't shrink photographs as dramatically as JPG. WebP combines the strengths of both — it supports transparency like PNG while achieving file sizes closer to JPG, and is increasingly the preferred format for web images. If your image doesn't need transparency, converting a PNG to JPG or WebP before compressing will usually produce the smallest possible file.
"Compress as much as possible" isn't always the right goal — the right amount of compression depends on how an image will be used. For a thumbnail or small preview image, very aggressive compression is rarely noticeable, since fine detail wouldn't be visible at that size anyway. For a large hero image that fills most of a screen, more conservative compression preserves the detail that's actually visible at that size. For images that might be downloaded and used elsewhere — by other people, or for printing — keeping quality higher than the bare minimum needed for the immediate use case leaves room for that image to be useful in other contexts later, rather than needing to track down and re-process an original.
If an image is going to go through multiple editing steps — resizing, cropping, adding text or borders — the order in which compression happens relative to these other steps matters for final quality. Compressing first and then performing other edits means each subsequent step starts from an already-compressed (and therefore already slightly degraded, for JPG) image, and further edits that involve re-encoding (like adding a border, which typically re-saves the whole image) compound this degradation slightly. Performing other edits first, on the highest-quality version of the image, and compressing only as the final step before the image is used or shared, generally produces a better result than compressing early and editing afterward.
At the compression levels this tool applies, quality loss is generally invisible on screens and in most printed materials. JPG compression does discard some data, but the algorithm prioritises removing information the human eye is least sensitive to. If you need to compare results, you can always keep your original file and compare the two side by side.
Because compression happens in your browser rather than on a server, the practical limit depends on your device's available memory rather than a fixed cap. Most images up to 25MB compress quickly on any modern phone, tablet or computer.
Re-encoding an image during compression typically strips embedded metadata, including camera details and GPS coordinates, as a side effect. If protecting your privacy is the main goal, you can verify what metadata is present using our EXIF Viewer before and after compressing.
This page compresses one image at a time for the most control over the result. If you need to process many images together and download them as a single ZIP file, use our Bulk Image Compressor instead.
No. This tool is completely free with no account, signup, watermark or usage limit. You can compress as many images as you like.