Image Compressor

Compress JPG, PNG, WebP images online for free

Image Compressor Online – Free JPEG, PNG, WebP Compressor

Heavy images slow down websites, eat phone storage, and fail to upload on forms with strict size limits. This free image compressor shrinks JPG, PNG, WebP, and GIF files right in your browser — with a quality slider you control, a live before/after size comparison, and zero watermarks. Many online compressors cap free usage or force you into a paid plan for bulk compression; here, bulk is free and unlimited.

How to Compress Images

Step 1: Drag and drop your images into the box, or click to select multiple files. Step 2: Move the quality slider (higher = better quality, lower = smaller file) and pick an output format — keep the original, or convert to JPEG or WebP for maximum savings. Step 3: Click “Compress Images”. Step 4: See exactly how much each file shrank, then download individually or all together as a ZIP.

Why Use This Image Compressor?

Full control: a 10–100% quality slider instead of a mysterious “auto” setting. Format flexibility: output JPEG for photos, WebP for the web, or PNG when you need lossless. Bulk, free: compress many images at once and download everything as a ZIP — features competitors typically paywall. Private: images never leave your device; processing is 100% local.

FAQs

How much can images shrink? Photos often shrink 60–80% at quality 80 with barely visible difference. PNG screenshots with flat colors compress especially well when converted to WebP.

Which format should I choose? JPEG for photos (smallest), WebP for websites (modern and small), PNG only when you need perfect lossless quality or transparency.

Do GIFs stay animated? No — only the first frame is kept. Use this tool for still images; animated GIFs need a dedicated GIF optimizer.

Is there a limit on number of images? No fixed limit. Very large batches may take a while depending on your device.

Are my images uploaded anywhere? Never. Compression runs entirely in your browser.

Tips to Compress Images Without Visible Quality Loss

Image compression works best when you match the format and settings to how the image will be used. For photographs, JPEG or WebP at 70-80% quality is the sweet spot: file size drops by more than half while the difference is invisible on screens. For graphics with sharp lines, text, or transparency, keep them as PNG only when you truly need lossless quality; otherwise WebP gives you the best of both worlds - smaller files with full transparency support. The WebP format, developed by Google, typically produces files 25-35% smaller than equivalent JPEGs and PNGs.

One of the most overlooked steps is resizing before compressing. A 4000-pixel-wide photo displayed at 800 pixels wastes enormous space; shrinking the dimensions first, then compressing, multiplies your savings. If you are preparing images for a website, convert them to WebP and add a JPEG fallback for very old browsers - modern browsers all support WebP natively, and the speed improvement is one of the easiest SEO wins available. Batch processing is also worth using: compressing a whole folder at once with identical settings keeps your site or document consistent.

• Photos: use JPEG or WebP. Start at 80% quality and go lower only if the file is still too large. Below 60%, blocky artefacts start to appear in skies and gradients.
• Screenshots and logos: try WebP first. It handles flat colours and text far better than JPEG, at a fraction of PNG's size.
• Resize, then compress. Halving the pixel dimensions cuts the file size roughly four times before compression even begins.
• Keep one original. Like all lossy compression, aggressive settings cannot be undone. Archive the originals before bulk-compressing.

Related Free Image Tools

If you work with PNG files often, try our dedicated PNG to WebP converter - it converts PNG and JPG images to the modern WebP format in one click, with a live quality slider so you can preview the size savings before downloading.