Image Compressor

Client-side image compression is a method of reducing an image's file size entirely within your web browser using HTML5 features (like the Canvas API, OffscreenCanvas, and Web Workers). Since the computation occurs locally on your machine, your image files are never uploaded to any remote server, guaranteeing absolute privacy and instantaneous compression.

Lossy compression (used in JPEG, WebP, and AVIF) permanently discards subtle pixel data that the human eye is unlikely to notice, resulting in huge file size reductions (often up to 90%). Lossless compression (used in PNG) compresses the file without altering any pixel data, maintaining pixel-perfect quality but yielding larger file sizes.

ToolZeno supports JPG, JPEG, PNG, WEBP, AVIF, and BMP as input. You can choose to convert your output to JPG, PNG, WEBP, or AVIF. If your browser does not support encoding to a newer format like AVIF, the tool will automatically fall back to standard formats to prevent crashes.

Image files often contain EXIF metadata which holds sensitive information like GPS location coordinates, capture date, device model, and camera settings. Removing this metadata protects your privacy when sharing photos online and further reduces the file size by stripping unnecessary header bytes.

Yes. ToolZeno includes a 'Keep Metadata' option. For JPEG images, the compression framework extracts the APP1 EXIF segment from the original file and injects it back into the compressed output buffer. Note that canvas rendering automatically strips metadata for non-JPEG formats.

There is no set file size limit. However, because processing occurs in your browser's RAM, very large images (e.g., above 75MB) or huge batches of 100+ files may reach browser memory thresholds, especially on mobile devices. We recommend compressing extremely large files individually.