How to Make Your Website Load Faster: The 2026 Speed Checklist

How do you make your website load faster?

To make your website load faster: optimize and correctly size your images, reduce and defer non-critical JavaScript, use browser caching and a CDN, load fonts efficiently, and set explicit image dimensions to stop layout shift. Most slow sites fail on the same handful of things — fix these and you’ll pass Core Web Vitals regardless of your platform.

Start by measuring the right thing

Run your page through PageSpeed Insights and look at the field data for mobile, not just the lab score. The three Core Web Vitals tell you where the problem is: LCP (how fast the main content appears), INP (how quickly the page responds to taps), and CLS (whether things jump around while loading). Fix in that order of impact.

1. Images — usually the biggest win

• Serve WebP or AVIF, not PNG/JPEG, and size them to their display size (never a 3000px image in a 400px slot).
• Lazy-load everything below the fold with loading="lazy".
• Preload the hero image — it’s almost always your LCP element.

2. JavaScript — the INP killer

• Ship less of it. Audit third-party scripts (chat widgets, analytics, ad tags) — they’re often the heaviest thing on the page.
• Defer non-critical scripts (defer/async) so they don’t block rendering.
• Code-split heavy features so they load only when needed.

3. Fonts — a quiet source of shift and delay

• Self-host fonts or use a system font stack; avoid third-party font round-trips.
• Use font-display: swap and preload the primary font.

4. Caching and delivery

• Set long cache headers on static assets so repeat visits are instant.
• Serve through a CDN so assets load from a server near the user (this alone often halves time-to-first-byte).
• Enable compression (Gzip/Brotli) on text assets.

5. Stop layout shift (CLS)

• Set width and height (or an aspect-ratio) on every image and embed.
• Reserve space for ads, banners, and anything injected after load.

The uncomfortable truth about templates

Sometimes the site is slow because the template is. Page-builder and multipurpose themes ship megabytes of code you’ll never fully use, and no amount of image optimization fully fixes that. If you’ve done the checklist and you’re still slow, the foundation may be the problem — starting from a lean, hand-coded template is sometimes the real fix.

Speed problems, fixes, and impact

If you have worked the checklist and the page is still heavy, the template itself may be the weight — a lean, hand-coded template is sometimes the real fix.

Frequently asked questions

What is the single biggest thing that slows a website down?

Usually images — large, unoptimized, wrongly-sized files. Serving modern formats at the correct size and lazy-loading below the fold is the highest-impact fix on most sites.

Does website speed affect SEO?

Yes. Core Web Vitals are a Google ranking signal, and fast, server-rendered pages are also easier for AI engines to read and cite. Speed helps both search and AI visibility.

How fast should a website load?

Aim for Largest Contentful Paint under 2.5 seconds on mobile, Interaction to Next Paint under 200ms, and Cumulative Layout Shift under 0.1 — the Core Web Vitals “good” thresholds.