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Image Compressor for Web

Optimize images for faster websites and better Core Web Vitals

Upload Image

Drop image here or click to upload

JPEG, PNG, WebP supported

Quality: 80%
Output:

Processed in your browser during compression

Compressed image appears here

Upload an image, adjust quality, and hit Compress.

Page speed directly impacts your bottom line. Google reports that 53% of mobile users abandon sites that take longer than 3 seconds to load, and images are typically the single heaviest resource on any web page — often accounting for 50-80% of total page weight. Unoptimized images don't just slow your site; they hurt your Core Web Vitals scores, tank your search rankings, and cost you conversions. Every 100ms of load time improvement can increase conversion rates by up to 8%.

Coda One's Image Compressor is purpose-built for web optimization. The quality slider lets you find the exact balance between visual quality and file size — for most web images, 75-85% quality delivers files that look identical to the original while being 50-70% smaller. Choose WebP output for the best compression ratio (all modern browsers support it), or stick with JPEG for maximum compatibility. The tool handles your hero images, product photos, blog graphics, and thumbnails with equal precision.

The workflow fits naturally into web development: export your images at full quality from Figma, Photoshop, or your CMS, then compress them here before uploading. Everything runs in your browser, so the image is not uploaded to our servers during compression. Unlike cloud-based compressors that charge per image or per month, this route is free to use without a signup wall. That browser-based flow can be useful for client projects and confidential content.

Frequently Asked Questions

What image size should I aim for on the web?
As a general guideline: hero images under 200KB, content images under 100KB, thumbnails under 30KB. These targets vary by use case, but keeping total page image weight under 500KB ensures fast load times on most connections. Use the quality slider to hit your target size.
Should I use WebP or JPEG for web images?
WebP produces 25-35% smaller files than JPEG at equivalent quality and is supported by all modern browsers (95%+ of users). Use WebP as your default web format. Only fall back to JPEG if you need to support very old browsers or specific email clients that don't render WebP.
How does image compression affect Core Web Vitals?
Smaller images directly improve Largest Contentful Paint (LCP) — the metric that measures how fast your main content loads. Optimized images also reduce Cumulative Layout Shift (CLS) when properly sized. Both are Google ranking factors, so compression has a direct SEO impact.
Can I use this for responsive images at multiple sizes?
This tool compresses at the original resolution. For responsive images, first resize your image to each breakpoint size using our Image Resizer, then compress each version here. This produces the smallest possible files for every screen size.
Does this replace a CDN image optimization service?
It complements CDN services, not replaces them. Pre-compressing images before upload means your CDN starts with smaller files. For sites with thousands of images needing automatic optimization, a CDN service adds value. For smaller sites or manual workflows, this free tool is often all you need.
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