Why compress images online?
Large image files are one of the most common causes of slow websites. Google's PageSpeed Insights measures page load time as a ranking factor — pages that take more than 3 seconds to load lose an average of 53% of mobile visitors before the page fully renders. By compressing your images, you can dramatically reduce file size without any visible quality loss.
Our free image compressor works entirely in your browser — your images are never uploaded to a server. This makes it both fast and privacy-friendly: sensitive images such as documents, screenshots, or personal photos never leave your device.
The tool supports JPEG, PNG, and WebP formats. For photographs, JPEG is typically the best choice. For images requiring transparency (logos, icons), use PNG. For modern web use, WebP offers the best compression efficiency and is now supported by all major browsers.
Frequently asked questions
How much can I compress an image without visible quality loss?▼
For JPEG files, compression to 70-80% of the original size is typically achievable with barely perceptible quality loss — especially at normal screen resolutions. PNG files can be compressed losslessly (no quality loss) but the reduction is more modest, typically 10-30%. WebP format offers the best results: equivalent quality at 25-35% smaller file sizes than JPEG.
Are my images uploaded to a server?▼
No. The image compressor processes everything locally in your browser using the Canvas API. Your image never leaves your device. This makes the tool safe for compressing confidential images, document scans, or personal photos. No image-related cookies are set.
Which format should I use for my website?▼
Use WebP as the default for all web images — all modern browsers support it, and it offers the best quality-to-size ratio. Use JPEG for photos that also need to work outside the browser (email, print). Only use PNG when transparency is truly required. Avoid BMP and TIFF on websites — these formats are uncompressed and unnecessarily large.
Does image compression really help my Google ranking?▼
Yes, indirectly. Google Core Web Vitals — particularly Largest Contentful Paint (LCP) and overall page load speed — are confirmed ranking factors. Images are often the heaviest elements on a webpage. Compressing images is one of the highest-impact quick wins for web performance, and Google PageSpeed Insights flags unoptimized images as a recommendation on almost every site it analyzes.
What is the maximum file size I can compress?▼
The maximum file size is limited by the available memory in your browser — in practice the tool handles files up to roughly 20-25 MB comfortably. Very large files (professional RAW photos of 50+ MB) may cause issues on devices with limited RAM. For such files, consider a desktop application like GIMP (free) or Squoosh, which is browser-based but optimized for large files.