Free Image Compressor & Resizer
Large, uncompressed images are one of the most common reasons websites load slowly — and page speed is a direct Google ranking factor. This tool compresses and resizes JPG, PNG, and WebP images entirely in your browser, so you can shrink file sizes for faster page loads without installing anything or uploading your files anywhere.
How to use it
- Drag in one or more images, or click to browse.
- Choose an output format, adjust the quality slider, and set a maximum width/height.
- Click Compress all images to see before/after sizes for each file.
- Download images individually or grab them all at once as a ZIP.
Tips for web-ready images
- Resize images to the actual dimensions they'll display at — don't ship a 4000px photo for a 600px thumbnail.
- 75–85% quality is usually visually lossless for JPEG while cutting file size significantly.
- Use WebP where your platform supports it for the best size-to-quality ratio.
- Reserve PNG for images that need transparency or sharp, flat-color graphics like logos.
Frequently asked questions
Does this tool upload my images to a server?
No — all processing happens locally in your browser using the Canvas API. Your files never leave your device.
Why does image size matter for SEO?
Heavy images slow down page load and hurt Core Web Vitals like Largest Contentful Paint, which Google factors into search rankings.
JPEG, PNG, or WebP — which should I pick?
JPEG for photos, PNG when you need transparency or crisp flat graphics, and WebP for the smallest size at comparable quality where supported.
Want your whole site optimized for speed?
Techno Alig builds fast-loading, Core-Web-Vitals-friendly websites — this compressor is one of 30+ free tools we offer.
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