OtoDev | performance | OtoDev - Curated links for web developers

Brotli.Pro

Check if your website supports Brotli compression

http network performance website analysis

Dither it!

Dither images for style and performance

image performance

Squoosh

Make images smaller using best-in-class codecs, right in the browser

image performance

Slowfil.es

Demonstate and observe slow-loading resources.

http network performance

Worth It

Determine how much less JavaScript is downloaded using module/nomodule

javascript performance

Lighthouse Scoring Calculator

Calculate your Lighthouse performance score across versions

performance

SpeedVitals

SpeedVitals measures Website Performance and helps optimize Core Web Vitals

performance

ESBench

Create shareable JavaScript benchmarks

javascript performance

HTTP/3 Check

Check if a URL supports HTTP/3.

http performance

JPEG.rocks

Optimize your jpegs

image performance

gif2avif

Convert GIFs to next-generation AVIF files

image performance

pkg-size

Find the true size of an npm package.

javascript performance

waterfaller.dev

Analyse your website’s waterfall to make it faster.

performance

Lighthouse CI Diff

Compare two Lighthouse reports

performance

SEO Toolbox

Check and visualize the Cumulative Layout Shift of any website, Test URLs in bulk for their HTTP response headers, redirect chains, HTTP status codes and applicable robots.txt rules and much more…

http performance seo website analysis

avif.io

Convert images to AVIF.

image performance

AVPress

Optimise videos in your browser.

performance video

MConverter

Convert images to and from JXL (JPEG XL), AVIF, WebP and more

image performance

Yellow Lab

Test and analyse your website.

performance

Responsive Breakpoints

Create responsive breakpoints for your images and get the adequate HTML them

image performance