Tools & Wizards About Us
sfjazz.org screenshot

Report Summary

  • 10

    Performance

    Renders faster than
    23% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 49% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

sfjazz.org

Home | SFJAZZ.org

Page Load Speed

6 sec in total

First Response

197 ms

Resources Loaded

4.8 sec

Page Rendered

985 ms

sfjazz.org screenshot

About Website

Welcome to sfjazz.org homepage info - get ready to check SFJAZZ best content for United States right away, or after learning these important things about sfjazz.org

The SFJAZZ homepage showcases the 2025‑26 season with featured concerts, on‑demand and livestream content, upcoming performances, education programs (classes/workshops), membership info, and SFJAZZ Ce...

Visit sfjazz.org

Key Findings

We analyzed Sfjazz.org page load time and found that the first response time was 197 ms and then it took 5.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

sfjazz.org performance score

10

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value12.6 s

0/100

25%

SI (Speed Index)

Value8.9 s

15/100

10%

TBT (Total Blocking Time)

Value2,630 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.317

36/100

15%

TTI (Time to Interactive)

Value18.8 s

3/100

10%

Network Requests Diagram

sfjazz.org

197 ms

www.sfjazz.org

1846 ms

fbevents.js

33 ms

gtm.js

75 ms

gtm.js

115 ms

Our browser made a total of 160 requests to load all elements on the main page. We found that 73% of them (117 requests) were addressed to the original Sfjazz.org, 8% (13 requests) were made to Embed.tawk.to and 5% (8 requests) were made to . The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Sfjazz.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 807.5 kB (18%)

Content Size

4.5 MB

After Optimization

3.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sfjazz.org main page is 4.5 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 3.5 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 94.2 kB

  • Original 107.2 kB
  • After minification 86.1 kB
  • After compression 13.0 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 21.1 kB, which is 20% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 94.2 kB or 88% of the original size.

Image Optimization

-5%

Potential reduce by 174.8 kB

  • Original 3.5 MB
  • After minification 3.3 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. SFJAZZ images are well optimized though.

JavaScript Optimization

-48%

Potential reduce by 266.1 kB

  • Original 554.6 kB
  • After minification 554.6 kB
  • After compression 288.5 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 266.1 kB or 48% of the original size.

CSS Optimization

-72%

Potential reduce by 272.4 kB

  • Original 376.9 kB
  • After minification 375.1 kB
  • After compression 104.5 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Sfjazz.org needs all CSS files to be minified and compressed as it can save up to 272.4 kB or 72% of the original size.

Requests Breakdown

Number of requests can be reduced by 33 (35%)

Requests Now

94

After Optimization

61

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 94 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SFJAZZ. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

sfjazz.org

sfjazz.org

197 ms

www.sfjazz.org

www.sfjazz.org

1846 ms

fbevents.js

fbevents.js

33 ms

gtm.js

gtm.js

75 ms

gtm.js

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115 ms

default

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271 ms

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235 ms

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267 ms

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203 ms

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84 ms

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115 ms

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twk-app.js

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Accessibility Review

sfjazz.org accessibility score

80

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Buttons do not have an accessible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

sfjazz.org best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

sfjazz.org SEO score

77

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

robots.txt is not valid

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sfjazz.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Sfjazz.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

sfjazz.org

Open Graph data is detected on the main page of SFJAZZ. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: