HTTP Archive sample: CWV pass rate with and without an embedded form tool
| Group | Pass with form tool | Pass without | Median LCP with | Median LCP without | Homepages with tool (CrUX) |
|---|---|---|---|---|---|
| WordPress | 41.6% | 52.2% | 2,399 ms | 2,065 ms | 29,744 |
| Webflow | 34.8% | 54.0% | 2,445 ms | 2,054 ms | 515 |
| Shopify | 60.2% | 57.4% | 1,949 ms | 1,916 ms | 6,276 |
| Other platforms | 36.6% | 39.7% | 2,183 ms | 2,120 ms | 10,672 |
| Top 10K | 43.2% | 48.9% | 1,946 ms | 1,784 ms | 213 |
| Ranks 10K to 100K | 42.0% | 42.2% | 2,027 ms | 1,964 ms | 2,453 |
| Rest of top 1M | 42.9% | 42.6% | 2,281 ms | 2,109 ms | 44,582 |
| All homepages | 42.9% | 42.6% | 2,266 ms | 2,091 ms | 47,248 |
Source: PageSpeed Matters, HTTP Archive top 1M crawl and CrUX, Sept 2026. Detection mixes form plugins and hosted forms.
Summary
Forms are where many sites turn visitors into leads: contact forms, quote requests, signups and surveys. Most are built with a form plugin or an embedded form service, and each one brings its own scripts and styles.
We looked at two questions. Which form builders are most widely embedded? Jotform appears on 33,550 of 40.3M homepages, against 24,636 for HubSpot Forms and 6,268 for Typeform. And do form tools go with slower sites? Overall, no. But that flat result hides clear gaps on WordPress and Webflow.
What we measured
We used two separate samples, and the numbers from each should be read on their own.
Adoption counts cover 40.3M homepages crawled between January and October 2026. We counted homepages carrying each form builder's embed code.
Speed figures come from the HTTP Archive crawl of the top 1M sites from September 2026, on mobile, joined to Chrome UX Report (CrUX) field data at the 75th percentile. A homepage counts as having a form tool when HTTP Archive detects a form builder, including WordPress form plugins and hosted form services. That detection mixes plugins and hosted forms, so it is broader than the adoption counts. 56,697 top 1M homepages have a form tool. A site passes Core Web Vitals when loading, responsiveness and visual stability are all rated good.
The speed results are correlations. Popularity bands do not overlap: Top 10K, ranks 10K to 100K, and the rest of the top 1M.
Jotform leads the form builder count
Across 40.3M homepages crawled since January 1, 2026, Jotform is embedded on 33,550, HubSpot Forms on 24,636 and Typeform on 6,268. That puts Jotform ahead of HubSpot Forms by about 1.4 to 1, and both well ahead of Typeform.
HubSpot Forms often comes with a wider HubSpot setup, so its count likely reflects CRM adoption as well as a choice of form builder.
The top 1M crawl shows where form tools concentrate by platform. 29.4% of top 1M WordPress homepages (33,401 of 113,593) run a detected form tool, against 13.6% of Shopify homepages. WordPress sites usually add contact forms through plugins, while Shopify themes include a contact form, which likely leaves stores fewer reasons to add a separate tool.
No overall speed difference
Across 56,697 top 1M homepages with a form tool, there is no overall speed difference. 42.9% pass Core Web Vitals, against 42.6% of homepages without one. Median LCP is 175 ms slower with a form tool, at 2,266 ms against 2,091 ms, but that is not enough to change the pass rate as a whole.
By popularity, only the Top 10K shows a gap, and it is the smallest group (213 homepages with a form tool and CrUX data). Top 10K homepages with a form tool pass 43.2% against 48.9% without, ranks 10K to 100K pass 42.0% against 42.2%, and the rest of the top 1M pass 42.9% against 42.6%.
The flat number hides platform gaps
Split by platform, clear gaps appear. WordPress homepages with a form tool pass 41.6% of the time (29,744 with CrUX data) against 52.2% without (70,169). WordPress sites make up most of the form tool group, while the group without a form tool includes many sites on platforms that pass less often in general. That mix likely flattens the overall number.
WordPress form plugins on their own show the same gap. Sites running one pass 41.5% of the time (27,128) against 51.9% without (72,785), with a median LCP of 2,415 ms against 2,071 ms. Many form plugins load their scripts and styles on every page, not just the page with the form, which is a likely contributor, though the data shows a link rather than a cause.
Webflow homepages with an embedded form tool pass 34.8% (515) against 54.0% without (1,793). Shopify goes the other way: form tools coincide with a slightly higher pass rate, 60.2% (6,276) against 57.4% (38,981). Shopify stores that add a form tool may be larger, better resourced stores, which could explain the difference better than the tool itself.
What this means for your site
A form tool does not have to slow a site down, but on WordPress and Webflow the sites that use one pass Core Web Vitals less often. The fix is usually about where and when the form loads.
- Load form plugin scripts and styles only on pages that contain a form. Many WordPress plugins and asset managers support this.
- For hosted forms, load the embed when the form scrolls into view or when a visitor clicks to open it.
- Reserve space for embedded forms so they do not shift the layout when they appear.
- Remove form plugins and embeds you no longer use, along with any leftover script tags.
- Check your contact and landing pages in PageSpeed Insights before and after any change.
Sources
- PageSpeed Matters analysis of 40.3M homepages crawled January to October 2026
- HTTP Archive crawl of the top 1M sites, September 2026, mobile
- Chrome UX Report (CrUX) field data, 75th percentile, September 2026
- Largest Contentful Paint (LCP), web.dev: https://web.dev/articles/lcp
Frequently asked questions
What is the most popular online form builder?
Jotform, by embed count. Across 40.3M homepages crawled since January 1, 2026, Jotform is on 33,550, HubSpot Forms on 24,636 and Typeform on 6,268.
Do form plugins slow down WordPress?
WordPress sites running a form plugin pass Core Web Vitals less often: 41.5% against 51.9% without, with a median LCP of 2,415 ms against 2,071 ms. This is a correlation, not proof the plugin is the cause.
Do embedded forms hurt Core Web Vitals?
Not overall: 42.9% of top 1M homepages with a form tool pass, against 42.6% without. By platform it differs. WordPress sites with a form tool pass 41.6% against 52.2%, and Webflow sites 34.8% against 54.0%.
Loading form scripts only where a form appears keeps lead capture working without weighing down every page. Need help with this? See our conversion rate optimization agency.