Compress JPEG and PNG images in your browser. No upload to any server - fully private. Adjust quality and download instantly. Free online image compressor.
The Image Compressor reduces the file size of JPEG, PNG, and WebP images entirely within your browser - your photos never leave your device. Use the quality slider or preset buttons to balance between file size and visual fidelity, then download the compressed result instantly. It's ideal for optimizing images before uploading to websites, blogs, or social media.
The tool decodes your image into raw pixel data using an HTML5 <canvas> element, then re-encodes it using the browser's built-in codec via canvas.toBlob() or canvas.toDataURL() with a quality parameter between 0 and 1. For JPEG and WebP, this quality parameter directly controls the lossy compression level - lower values discard more high-frequency detail to achieve smaller file sizes. PNG compression is lossless in the browser, so size reductions for PNGs come primarily from re-encoding overhead rather than quality loss.
Your images never leave your device - all compression processing happens locally inside your browser tab using the Canvas API. This makes the tool safe for compressing confidential photos, medical images, legal documents scanned to JPEG, or any other sensitive visual content. There is no server, no upload, no account, and no image retention of any kind.
Browser-based compression is limited by the codecs available in your browser - it cannot output advanced formats like AVIF on older browsers or apply techniques like chroma subsampling control or progressive JPEG encoding. Very large images (above ~50 MP) may cause canvas memory errors on low-RAM devices. The tool also does not support batch compression of multiple images simultaneously or lossless PNG optimization via algorithms like zopfli or pngquant, which can achieve better PNG compression ratios than the browser's built-in encoder.
The tool accepts JPEG, PNG, and WebP as input formats, which covers the vast majority of web and photo images. Output format depends on the input type and browser support - Chrome and Edge fully support WebP encoding, while Safari added WebP support in version 14 (2020). JPEG and PNG output work in all modern browsers. GIF, TIFF, SVG, and RAW camera formats are not supported as these require specialized codecs not available in the standard browser Canvas API.
TinyPNG uses server-side pngquant and mozjpeg algorithms that typically achieve better compression ratios than browser-native codecs - especially for PNGs - but your images are uploaded to their servers. Google's Squoosh offers the widest format support and WebAssembly-powered codecs for near-native compression quality, all client-side, making it the most powerful browser tool available. This compressor targets simplicity and speed: no setup, instant results, private by default, and sufficient quality for the majority of web optimization use cases.