❓ Frequently Asked Questions – Image Compressor
Is this image compressor safe to use? Are my images uploaded?
Yes, completely safe. This image compressor works entirely in your browser using the HTML5 Canvas API. Your images are never uploaded to any server, never stored, and never shared. The compression happens locally on your device, so even confidential or personal images are completely private.
What image formats are supported?
This tool supports JPG/JPEG, PNG, WebP, and GIF formats for input. You can also convert between formats — for example, convert a PNG to WebP or a JPG to PNG — using the Output Format setting. WebP is recommended for web use as it offers the best compression ratio.
What quality setting should I use?
80% quality is the recommended sweet spot for most images — it reduces file size by 60–70% while maintaining excellent visual quality. For social media or web thumbnails where file size matters most, 60–70% works well. For professional or print-quality images where you want minimal loss, use 85–95%.
Can I compress multiple images at once?
Yes! This tool supports bulk image compression. Simply select multiple files when browsing, or drag and drop multiple images at once onto the upload area. All images will be compressed with the same settings and can be downloaded individually or all at once using the "Download All" button.
What is the difference between JPG, PNG and WebP?
JPG (JPEG) is best for photos — it achieves high compression but doesn't support transparency. PNG supports transparency and is ideal for logos, icons and graphics but has larger file sizes. WebP is a modern format that supports both lossy and lossless compression, offers 25–35% smaller files than JPG at the same quality, and supports transparency — making it the best choice for web use.
How does the resize feature work?
Use the Max Width and Max Height sliders to set maximum dimensions. If your image exceeds these dimensions, it will be scaled down proportionally (aspect ratio is preserved). Setting either slider to 0 means "no limit" — the original dimensions are kept. This is useful for reducing large 4K photos to web-friendly sizes before compression.