Design

Image Resizer and Compressor

Shrink oversized photos and graphics to the width your website actually needs, convert between JPG, PNG and WebP, and pick the quality level, then compare file size before and after and download the result.

Images are never upscaled. Transparency is kept for PNG and WebP and flattened onto white for JPG.

What the image resizer does

Images are the heaviest part of almost every web page, and most of that weight is waste: a 4000 pixel photo straight from a phone displayed in a 800 pixel column, or a screenshot saved as PNG when a JPG would be a tenth of the size. This tool fixes both problems in one step. Upload an image, choose the maximum width it needs to be, pick an output format and quality, and the server resamples it with high quality filtering and recompresses it. You get a side by side comparison of dimensions and file size, a preview, and a download link. Transparency in PNG and WebP files is preserved.

How to use it

  • Upload a JPG, PNG, WebP or GIF up to 15 MB.
  • Set the width. Use the presets as a guide: 400 for thumbnails, 800 for blog images, 1200 for content that spans the page, 1600 to 1920 for full width hero banners. Height follows automatically to keep the aspect ratio.
  • Choose a format. Keep original if you just want it smaller, WebP for the smallest file that still looks good, JPG for photos when you need universal support, or PNG when the image has sharp edges, text or transparency that must stay lossless.
  • Adjust quality. 75 to 85 is the sweet spot for photos; text heavy graphics may need 90.
  • Click resize, check the saved percentage, and download the file.

Choosing the right format

WebP produces files around 25 to 35 percent smaller than JPG at the same visual quality and supports transparency, and every current browser displays it. JPG remains the safest choice when the image will also be used in email or older software. PNG is lossless, so it never blurs, but photos saved as PNG are huge; reserve it for logos, icons, screenshots with text and anything needing a transparent background. GIF is kept only as an input and passthrough format; for animation, video is far more efficient. If you only need to convert to WebP without resizing, the dedicated image to WebP converter does exactly that.

Why it matters

Page speed is a ranking factor and a conversion factor, and oversized images are the most common reason a site fails the Largest Contentful Paint metric in Core Web Vitals. Serving an image at roughly the size it is displayed, in a modern format, can cut a page from several megabytes to a few hundred kilobytes without anyone noticing a difference in quality. That means faster loads on mobile data, lower hosting bandwidth and better scores in Google PageSpeed Insights. Run the website speed test before and after replacing your heaviest images to see the effect. Optimized images are a standard part of every site Digzy Technology builds, and if you run a store our ecommerce work automates this for every product photo.

FAQ

Frequently asked questions

What width should I use for web images?
Match the largest size the image is displayed at, then multiply by 1.5 to 2 if you want it crisp on high density screens. In practice: 400 to 600 px for thumbnails, 800 to 1200 px for article images, 1600 to 1920 px for full width banners.
Why did the tool not enlarge my small image?
Upscaling adds pixels without adding detail, so the result looks blurry and the file grows. If your original is narrower than the width you chose, we keep its native width and only recompress it.
Does the quality slider affect PNG?
No. PNG is lossless, so it is always compressed at the maximum lossless level and quality does not apply. The slider controls JPG and WebP, where lower values mean smaller files with more compression artifacts.
Is my image stored on your server?
No. The file is processed in memory and returned directly to your browser. Nothing is written to disk or kept once the response is sent.
What happens to transparency?
PNG and WebP output keep the alpha channel intact. JPG cannot store transparency, so transparent areas are flattened onto a white background when you choose JPG.
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