Are PixelTools free to use?

Yes, all 18 image tools on PixelTools are completely free with no limits, no account required, and no hidden fees.

Do my images get uploaded to a server?

Never. All processing happens locally in your browser using the Canvas API. Your files never leave your device.

What image formats are supported?

Most tools accept JPG, PNG, WEBP, and GIF. Output formats depend on the specific tool.

Is there a maximum file size?

No hard limit. Very large files (20MB+) may take a few seconds on older devices but will process correctly.

Convert Images for Website Performance — Best Formats & Sizes

Why Image Format Matters for Website Speed

Images are the largest assets on most web pages. The format you choose directly impacts file size, load time, and your Google PageSpeed score. In 2026, choosing the right image format for website performance is one of the most impactful optimizations you can make — and it's completely free with the right tools.

Google's Core Web Vitals — specifically Largest Contentful Paint (LCP) — are heavily influenced by image loading speed. Websites that serve images in modern formats like WEBP consistently outperform those using only JPEG or PNG, both in speed and in search rankings.

Image Format Comparison for Web

WEBPSmallestAll modern browsersEverything — photos, graphics, icons

JPEGMediumUniversalPhotographs, product images

PNGLargestUniversalLogos, icons, transparency

GIFLargeUniversalSimple animations (use WEBP instead)

AVIFSmallestModern browsers onlyFuture-proof, limited support

The Optimal Image Workflow for Websites

Start with the highest quality source — always work from the original, uncompressed file.
Resize to display dimensions — use our Image Resizer to set the exact pixel dimensions your layout requires. Never serve a 4000px image in a 800px container.
Convert to WEBP — use our JPG to WEBP or PNG to JPG converter for maximum compatibility.
Compress the output — run through our Image Compressor at 80% quality for final size reduction.
Remove metadata — use our EXIF Remover to strip unnecessary metadata that adds file size.

Target File Sizes for Web Images

Hero/banner images: Under 300–500KB at 1920px wide
Product images: Under 150–200KB at 800–1200px
Blog post images: Under 100–150KB at 800px wide
Thumbnails: Under 30–50KB at 300–400px
Icons and logos: Under 10–20KB (use SVG when possible)

Impact on Google PageSpeed and SEO

Google PageSpeed Insights grades your website on a 0–100 scale. Images that are too large, in the wrong format, or not properly compressed are among the most common reasons for low scores. Specifically, PageSpeed flags:

"Serve images in next-gen formats" — fixed by converting to WEBP
"Efficiently encode images" — fixed by compressing at 75–85% quality
"Properly size images" — fixed by resizing to display dimensions
"Defer offscreen images" — fixed by adding loading="lazy" to img tags

Addressing the first three with our free tools can improve your PageSpeed score by 15–30 points, which directly impacts your Google search rankings.

Frequently Asked Questions

What image format is best for website performance?

WEBP is the best format for website performance in 2026. It offers 25–35% smaller file sizes than JPEG at equivalent quality and is supported by all modern browsers.

Should I use PNG or JPG for my website?

Use JPG for photographs and complex images. Use PNG for logos, icons, and images with transparency. For best performance, convert both to WEBP.

How do I convert images for website performance for free?

Use our free JPG to WEBP converter or PNG to JPG converter. Both run entirely in your browser with no upload required.

What image size is best for website loading speed?

Keep images under 200KB for most web use cases. Hero images can be up to 500KB. Use our Image Compressor to reduce file size and Image Resizer to set correct dimensions.

Does image format affect SEO?

Yes. Google's PageSpeed Insights specifically recommends serving images in next-gen formats (WEBP) and efficiently encoding images. Better image optimization leads to higher PageSpeed scores, which is a Google ranking factor.