Reduce file size with adjustable quality. Live preview with before/after comparison.
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PNG, JPG, WebP supported
Representative files processed with this compressor on March 18, 2026. Exact output sizes vary slightly by browser because JPEG and WebP encoders are not identical across engines, but the tradeoffs below are consistent.
Use this as a starting point, then confirm the result with your own images and display size.
Takeaway: For photos, WebP at 80 to 85 is a strong default. JPEG 82 to 88 is still a safe fallback when compatibility matters more than absolute size.
The lake reflection and sunset gradient stayed clean with only minor texture loss in the darker foreground.
Smaller than JPEG at a similar perceived quality, which makes it the better choice for most photographic web content.
Takeaway: Product images usually tolerate moderate lossy compression well, but keep an eye on edge halos around packaging, text, and curved highlights.
The mug and packaging stayed crisp enough for catalog use, with slight smoothing only in the subtle background texture.
Delivered the best size reduction while preserving clean product edges and soft studio-light gradients.
Takeaway: Screenshots with text are where aggressive JPEG starts to fail. Use high-quality WebP or keep PNG when pixel-perfect interface detail matters.
The file got very small, but chart lines softened and the sidebar labels picked up visible halos around sharp edges.
Sharper than JPEG at the same viewing size and a better fit for screenshots that still need meaningful size savings.
Compress large images before publishing to improve page load speed, storage efficiency, and user experience. This tool applies lossy compression to JPEG and WebP images with a live before/after preview so you can find the best quality-to-size tradeoff.
ImageLab processes files locally in your browser. Files are not uploaded to our servers, which is useful for sensitive screenshots, internal product images, and personal photos.
For web use, 80–90% is a good starting point for most photographs. This produces files that are 50–75% smaller than the originals with minimal visible quality loss. For thumbnails or preview images, 65–80% is reasonable. Below 60%, blocky JPEG artifacts become visible in most images.
PNG is a lossless format and cannot be compressed with a quality slider without converting it to a lossy format. If you upload a PNG, use the format dropdown to select JPEG or WebP to apply lossy compression. To keep lossless PNG output, use the Format Converter instead.
No. This tool only adjusts compression quality — the output image has the same pixel dimensions as the input. To resize images, use the Resize & Crop tool.
Yes. The tool shows a preview of the compressed image alongside the original file size and compressed file size so you can judge quality and savings before downloading.