Image Compressor

About This Module

Image Compressor is a free, browser-based tool that reduces image file size by re-encoding uploaded photos at a lower quality level. It supports JPG, PNG, and WEBP formats, runs entirely client-side, and requires no account or software installation. Your images are never uploaded to any server.

What Is Image Compressor?

Image Compressor lets you upload a photograph or graphic and reduce its file size by adjusting a quality slider from 1 to 100. The tool uses the HTML Canvas API to re-encode the image at the selected quality, producing a smaller file while preserving as much visual clarity as possible. Original size, compressed size, and percentage reduction are displayed side by side so you can instantly evaluate the trade-off between quality and file savings. The compressed result can be downloaded as JPG, PNG, or WEBP with a single click.

How It Works

Upload an image by dragging it into the drop zone or clicking to browse your device. Choose your desired output format and adjust the quality slider -- lower values yield smaller files at the cost of some visual fidelity. Click Compress to process the image. The tool draws the image onto a hidden canvas element and exports it at the chosen quality using the browser's native encoding. Once complete, the original and compressed file sizes appear along with the percentage reduction. Click Download to save the optimised image to your device.

Best Use Cases

• Website optimisation: Reduce hero images and product photos for faster page load times and better Core Web Vitals scores.
• Email attachments: Shrink large photographs so they fit within email size limits without using third-party compression software.
• Social media uploads: Compress images before posting to avoid platform re-compression that can degrade quality unpredictably.
• Storage management: Batch-compress holiday or event photos to reclaim disk space on local drives or cloud storage accounts.

Fields and Input Explanations

• Drop zone: Drag and drop an image file here, or click to open the file browser. Accepts JPG, PNG, and WEBP formats.
• Output format: Choose the file format for the compressed output -- JPG for photographs, PNG for graphics with transparency, WEBP for modern browsers.
• Quality: A slider from 1 (smallest file, lowest quality) to 100 (largest file, highest quality). Default is 80, which provides a good balance.
• Original: Displays the file size of the uploaded image before compression.
• Compressed: Displays the file size after compression at the selected quality level.
• Reduction: The percentage by which the file size was reduced compared to the original.
• Compress: Click to re-encode the image at the chosen quality and format.
• Download: Save the compressed image to your device.