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Speedflow

Webflow Performance

Find What's Slowing Down Your Webflow Site

Speedflow checks fonts, scripts, third-party code, and video embeds — the performance issues that Lighthouse scores but doesn't explain in Webflow terms.

For example,

  • Free plan available
  • No credit card
  • Takes ~30 seconds
Webflow Performance Audit - Speedflow
Webflow sites audited
357Webflow sites audited
had at least one critical issue
93%had at least one critical issue
performance checks per audit
10+performance checks per audit

What we check

Every Performance Issue That Affects Webflow Sites

Most performance checker tools aren't built for Webflow. Speedflow checks the signals that actually matter for how Webflow generates HTML.

  • Google Fonts loaded externally

    High

    External Google Fonts add a render-blocking request on every page load. Self-hosting fonts through Webflow eliminates this latency entirely.

  • Font preload missing

    High

    Self-hosted fonts without <link rel="preload" as="font"> load after the browser parses the stylesheet — causing flash of invisible text (FOIT) on every visit.

  • YouTube/Vimeo embeds not optimized

    High

    Default YouTube and Vimeo iframes load 500KB+ of third-party scripts on page load — even if the video is below the fold. A facade pattern loads the embed only on click.

  • Too many third-party scripts

    High

    More than 5 third-party scripts (analytics, chat, pixels, ads) measurably increase page load time. Speedflow lists every script so you know exactly what's running.

  • Webflow JS/CSS not minified

    High

    Unminified Webflow assets are a sign the site was published in preview mode or with incorrect export settings. Easy to fix, immediate impact.

  • font-display: swap missing

    Medium

    Without font-display: swap, custom fonts block text rendering until loaded. Adding swap shows fallback text immediately while the font loads.

Complete checklist

All 10+ Performance Checks

Every check Speedflow runs on your Webflow site, grouped by category.

Fonts

  • Google Fonts loaded externallyHigh
  • Missing preload for critical fontsHigh
  • font-display: swap missingMedium
  • Missing preconnect for font CDNMedium

Scripts

  • Webflow JavaScript not minifiedHigh
  • Webflow CSS not minifiedHigh
  • Duplicate jQuery detectedHigh
  • Multiple versions of same libraryHigh

Third-party scripts

  • Too many third-party scripts (5+)High
  • Advertisement scripts detectedHigh
  • Multiple analytics tools detectedMedium
  • Facebook Pixel detectedMedium
  • Chat widget detectedMedium

Video

  • YouTube/Vimeo embeds not optimizedHigh
  • Videos not lazy-loadedMedium

Icons

  • Large inline SVG icons (5KB+)Medium

How it works

Performance Audit in 30 Seconds, Fixes in Minutes

  1. Paste Your URL

    Any Webflow page – published or staging.

  2. Get a full audit in seconds

    50+ QA checks: accessibility, SEO, and performance. Prioritized by impact.

  3. Fix with confidence

    Follow Designer-specific instructions and launch knowing the site is clean.

What Webflow developers say after testing Speedflow

Real feedback from Webflow developers and agencies using Speedflow.

  • Finally, the tool that deserves the spotlight among Webflow developers. It's soo effective that we've instantly incorporated it into our QA process. An incredible time and nerve saver!

    Stefan Keglić

    Stefan Keglić

    the kreative duo, co-founder

  • There's always that moment when a client opens the site on their end and starts poking around. I used to dread it. Since I started using Speedflow before every launch, I actually look forward to that moment – because I know the site is clean.

    Sophie R.

    Sophie R.

    Webflow Developer

  • I used to spend 1-2 hours going through each site manually before launch. With Speedflow I get the same result in under a minute. That time adds up fast when you're managing multiple client projects at once.

    Tomas K.

    Tomas K.

    Webflow Developer

  • QA used to be held together by memory and manual checklists.

    Speedflow changed that – I run it at the 80-90% mark on every project, paste the URL, work through the fixes, done. Hours became minutes. One sitemap crawl covers the whole site, and fixes come with your actual data pre-filled and clear step-by-step instructions.

    Whenever I flag something, Dmytro has it sorted the same day. That kind of support is rare.

    If you're doing Webflow work and you're not using Speedflow, you're making QA harder than it needs to be.

    Maurice Röhler

    Maurice Röhler

    Freelance Strategic Web Designer

  • Before sending a site live, I always had that uncomfortable feeling – "did I miss something?"

    Speedflow killed that anxiety. I run an audit, fix what it flags, and launch knowing the site is clean. My clients haven't come back with quality complaints since.

    Tim S.

    Tim S.

    Freelance Webflow Developer

  • QA always felt overwhelming – I knew something was probably off, but I didn't know where to start or what actually mattered. When I tried Speedflow, everything clicked.

    The app doesn't just give you a score, it pinpoints the exact element causing the issue, explains why it matters, and guides you on how to fix it. That's how I finally started taking accessibility and other checks seriously, things I had never even considered before. Now auditing a site feels like a clear, manageable process instead of a frustrating guessing game.

    Alina Zinchenko

    Alina Zinchenko

    Webflow Developer

  • I run a small Webflow agency and QA was always the bottleneck before launch. We'd manually go through checklists, run, check accessibility – it took hours. Speedflow replaced most of that in one click.

    Klim

    Klim

    CEO & Founder of an Agency

FAQ

Common Questions

  • How is this different from running Lighthouse?

    Lighthouse gives you a score. Speedflow tells you which specific Webflow asset isn't minified, which exact font is missing preload, and which third-party scripts are running. It's the diagnostic layer under the score.

  • Does Speedflow measure Core Web Vitals?

    Speedflow checks the technical signals that affect Core Web Vitals — font loading, image loading priority, script weight, and embed behavior. For actual CWV measurements (LCP, CLS, INP scores), use Google Search Console or PageSpeed Insights alongside Speedflow.

  • My site uses GSAP — will it be flagged?

    Only if you have multiple versions of GSAP loaded simultaneously, which sometimes happens when a template and a custom script both include it. A single GSAP instance is not flagged.

  • What counts as "too many" third-party scripts?

    Speedflow flags when the total across analytics, marketing, ads, and chat categories exceeds 5. This is a signal to audit what's actually necessary — not all flagged scripts need to be removed.

Free audit

Run Your First Webflow Performance Audit Free

Paste your URL and see exactly what's holding your site back in speed.

For example,

  • Free plan available
  • No credit card
  • Takes ~30 seconds