Image Compressor
Compress JPG, PNG, and WebP images in your browser — no upload to any server. Reduce file size by up to 90% while keeping great visual quality. Batch compress, convert formats, and resize in one step.
Best for photos. Smaller files, no transparency.
Images larger than this will be downscaled. Aspect ratio preserved.
Upload images above to start compressing.
Free Online Image Compressor — JPG, PNG, WebP
This free image compressor reduces the file size of your JPEG, PNG, and WebP images entirely in your browser — nothing is ever uploaded to a server. Using the HTML5 Canvas API, your images are compressed locally with the same quality algorithms used by professional tools. It works on any device, requires no signup, and processes multiple images at once.
What You Can Do With This Tool
- Compress JPEG images — Reduce JPG file size by up to 90% with adjustable quality from 10 to 100.
- Compress PNG images — Losslessly reduce PNG size or convert to a smaller format.
- Compress WebP images — The modern web format with superior compression.
- Convert image formats — Convert JPG to WebP, PNG to JPEG, or any format to any other format in one step.
- Resize images — Downscale large images to a maximum width/height while preserving the aspect ratio.
- Batch compress — Upload dozens of images at once, compress them all, and download individually or all at once.
- Preview compressed images — Compare before and after inline before downloading.
- Live size savings — See exact file size reduction in KB/MB and percentage for every image.
Who Uses an Image Compressor?
Web developers and designers use it to optimize images before deploying to production — smaller images mean faster page loads and better Core Web Vitals scores. Bloggers and content creators compress images before uploading to WordPress, Squarespace, or Webflow. E-commerce store owners reduce product photo sizes to speed up their shops. Social media managers convert and resize images to platform-specific requirements. And anyone who needs to email or share images without hitting attachment size limits.
Unlike tools like TinyPNG or Squoosh that upload your images to remote servers, this tool runs 100% locally in your browser. Your images never leave your device — ideal for confidential or sensitive images.
Also try the Image to PDF converter to combine multiple images into a single PDF, or the Word Counter for analyzing your written content.
Frequently Asked Questions
Are my images uploaded to a server?
No. All compression runs locally in your browser using the HTML5 Canvas API. Your images never leave your device — not even for a millisecond. This makes it safe to use for confidential, watermarked, or private images.
What image formats are supported?
You can upload JPG/JPEG, PNG, WebP, GIF, BMP, and any other format your browser can decode. You can output to JPEG, PNG, or WebP. GIF and BMP are automatically converted to your chosen output format.
What quality setting should I use?
Quality 80 is the best starting point for most images — it reduces file size by 50–70% with no visible quality loss for typical photos. For thumbnails or background images, Quality 60–70 works well. For images where every detail matters (product photos, medical imaging), use Quality 90–95. Quality 100 is effectively lossless for JPEG/WebP.
What is the difference between JPEG, PNG, and WebP?
JPEG is lossy and produces the smallest files for photographs but does not support transparency. PNG is lossless and supports transparency, making it ideal for logos, screenshots, and graphics. WebP is a modern format that achieves better compression than both JPEG and PNG while supporting transparency — recommended for web use. All modern browsers support WebP since 2020.
How much can I reduce image file size?
It depends on the image and settings. A typical JPEG photo at Quality 80 is 50–70% smaller than the original. Converting a PNG photo to JPEG or WebP can reduce size by 70–90%. PNG graphics compress less dramatically since they are already lossless, but resizing them can still halve the file size.
Can I compress multiple images at once?
Yes — drag and drop multiple files or hold Shift/Ctrl to select multiple files in the file picker. All images are compressed simultaneously with the same settings, and you can download them individually or all at once.
Does compressing images affect SEO?
Yes — positively. Smaller images load faster, which improves Google's Core Web Vitals metrics (specifically Largest Contentful Paint). Google uses page speed as a ranking factor, and images are typically the largest resource on a page. Compressing images is one of the highest-impact optimizations for web performance and SEO.
What is the maximum file size or image dimensions?
There is no server-side limit since everything runs in your browser. The practical limit is your device's memory. Very large images (50+ MP) may slow down older devices. For best performance, images under 25 megapixels are recommended.