Online Image Optimizer ? Free Compress & Resize Tool by Chochi
Resize and compress images for the web in seconds. Upload a JPEG, PNG, or WebP, set your max dimensions and quality, and download an optimized file?no account required. Built for webmasters, e-commerce owners, bloggers, and agencies who want faster pages and better Core Web Vitals without losing visible quality.
How it works: Choose an image file (JPEG, PNG, or WebP; max 10 MB). Optionally set a maximum width and/or height to resize for your layout, adjust the quality slider (e.g. 60?100%), and pick an output format (keep original, JPEG, PNG, or WebP). Click Optimize Image. You get a download of the optimized file and a comparison of original vs optimized size so you can see the savings.
What this tool does
This online image optimizer resizes and compresses your images while preserving visual quality. You control max dimensions (so images fit your layout without oversized files), compression level via a quality slider, and output format?including WebP for smaller file sizes where supported. Processing runs on our server; you upload, we optimize, you download.
Typical use cases include product photos for e-commerce, blog and article images, hero banners, and thumbnails. Whether you're on WordPress, WooCommerce, Shopify, or a custom site, smaller images mean faster load times and a better experience. Files are processed temporarily and not stored; no account is required and we don't keep your uploads.
How to use the tool
- Open this Online Image Optimizer page on Chochi Tools.
- Click to select an image from your device (JPEG, PNG, or WebP; max 10 MB).
- Optionally set a maximum width and/or height (e.g. 1200 px) so the image is resized for your site.
- Adjust the quality slider if you want?higher keeps more detail, lower reduces file size.
- Choose an output format (keep original, or convert to JPEG, PNG, or WebP).
- Click Optimize Image and wait a moment for processing.
- Download the optimized image and replace the original on your website or in your workflow.
SEO and performance benefits
Smaller, correctly sized images improve page load time and Core Web Vitals (e.g. LCP and CLS), which matter for both user experience and SEO. Search engines favour fast, usable pages; slow image-heavy sites tend to rank worse and convert less. Compressing images for the web?instead of uploading huge originals?reduces bandwidth and helps mobile users especially.
Best practice is to serve images at the size they're displayed: avoid putting a 5000?5000 px photo in a 400 px box. Use this tool to resize and compress before upload, or to batch-optimize existing assets. Combined with modern formats like WebP where your stack supports it, you can often cut image weight by 30?50% or more with little visible loss.
FAQs
Does compressing images hurt quality?
It can if you compress too much. Our tool lets you set a quality level (e.g. 60?100%). At 80?90% most photos look fine and file size drops a lot. For graphics or logos you may prefer PNG and higher quality. Start with the default and compare the download; lower the slider only if you need smaller files.
What image size is best for blogs and product photos?
Use the size you actually display. For a content width of 800 px, a 1600 px-wide image (2? for retina) is usually enough. For product grids, 600?800 px wide is often sufficient. Set max width/height in the tool to match your layout so you don't upload 4000 px images for a 400 px box.
Is WebP better than JPG for SEO and performance?
WebP typically gives 25?35% smaller files than JPEG at similar quality, so it helps page speed and Core Web Vitals. Browsers widely support it; for older ones you can serve a JPEG fallback. Our optimizer can output WebP. SEO benefits come indirectly through faster load times and better user signals, not from the format name itself.
Can I use this for WordPress, WooCommerce, or Shopify?
Yes. Optimize images before uploading to your media library or product gallery, or use the tool to re-compress existing assets you've exported. For site-wide automation, consider plugins or themes that optimize on upload; this tool is ideal for one-off or batch prep when you want full control over dimensions and quality.
Are my uploads stored on your servers?
No. Files are processed temporarily and then removed. We don't keep your images or use them for anything except generating the optimized download. No account or login is required.
What file formats and sizes does the optimizer support?
Input: JPEG, PNG, and WebP. Maximum file size is 10 MB per image. You can output in the same format or convert to JPEG, PNG, or WebP. Dimensions are limited to 8192 px per side to keep processing fast and safe.
How does image optimization help Core Web Vitals?
Large images are a common cause of slow LCP (Largest Contentful Paint). Resizing and compressing reduces bytes and improves LCP. Proper dimensions also reduce layout shift (CLS) when images load. Google uses Core Web Vitals in page experience signals; faster, stable pages tend to perform better in search and for conversions.
Can I optimize images without losing quality?
You can minimize visible loss by keeping quality at 85?95% and only resizing to the size you need. Often you'll still see 20?40% file size reduction. For lossless savings, use PNG for graphics with few colours; for photos, a small quality drop (e.g. 80?85%) usually looks fine and saves more.
Need More Than Free Tools?
This free tool is built by Chochi, a web development, performance, and SEO studio. We help businesses get faster sites and better visibility in search.
Need help with whole-site image optimization or performance?
- Book a free performance consultation ? we'll review your site and suggest concrete improvements.
- Request an image or website optimization audit ? get a clear plan for speed and Core Web Vitals.
No pressure. Our web performance and SEO services are here when you're ready.