Image Compressor — Reduce Image File Size
Compress images to a smaller file size without leaving your browser. Drop in a JPG, PNG or WebP, choose an output format, drag the quality slider and optionally cap the longest side to downscale big photos. You instantly see the original versus compressed size, the percentage saved and a side-by-side preview, then download the result. Every step runs on your device, so your images never get uploaded to a server.
Runs entirely in your browser — nothing is uploaded to a server. Up to 25 MB.
Your compressed image will appear here
Drop, browse or paste an image to compress it and compare the file sizes.
Original size The size of the file you selected, before compression.
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Compressed size The size after re-encoding at the chosen format, quality and dimensions.
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Saved How much smaller the compressed file is compared with the original.
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Output size Width × height of the compressed image in pixels.
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JPEG and WebP are lossy formats: some detail is discarded to save space. Lower the quality gradually and check the preview.
How to use
- Drag an image onto the drop zone, click to browse, or paste it with Ctrl/Cmd + V.
- Pick an output format — JPEG for photos or WebP for smaller files on modern browsers.
- Drag the quality slider; 70–85% keeps images looking sharp while cutting the file size.
- Optionally set a max dimension to downscale large photos, for example 1920 px.
- Compare the original and compressed sizes, then click Download to save the smaller image.
Features
- Compress JPEG and WebP with an adjustable quality slider (10–100%)
- Optional resize that caps the longest side to shrink oversized photos
- Live side-by-side preview with original size, compressed size and percent saved
- Warns when a file is already well compressed and cannot get smaller
- Handles files up to 25 MB, including PNG transparency flattened onto white
- 100% in-browser — your images never leave your device