https://simpleswap.io/?id=jvw7l9dn7nk6aj4j

Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-DIV

nodeLabel: div.styles-module__X7HtVW__shell > main.styles-module__X7HtVW__main > div.theme-module__xVqVYG__container > div.mantine-visible-from-lg

path: 1,HTML,1,BODY,6,DIV,1,MAIN,0,DIV,0,DIV

selector: div.styles-module__X7HtVW__shell > main.styles-module__X7HtVW__main > div.theme-module__xVqVYG__container > div.mantine-visible-from-lg

snippet: <div style="position: absolute; inset: 0px; background-image: url("https://edge.simpleswap.io/…");" class="mantine-visible-from-lg">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
edge.simpleswap.io/images/illustrations/support.webp	0.0 ms	31.4 KiB
edge.simpleswap.io/images/backgrounds/main-bg.webp	0.0 ms	29.2 KiB
edge.simpleswap.io/images/illustrations/wide-choice.webp	0.0 ms	23.1 KiB
edge.simpleswap.io/images/illustrations/privacy.webp	0.0 ms	22.7 KiB
edge.simpleswap.io/images/illustrations/safety.webp	0.0 ms	19.0 KiB
edge.simpleswap.io/images/currencies-logo/trx.svg	0.0 ms	1.7 KiB
edge.simpleswap.io/images/promo-main-page/dai.svg	0.0 ms	1.4 KiB
edge.simpleswap.io/images/currencies-logo/usdc.svg	0.0 ms	1.3 KiB
edge.simpleswap.io/images/promo-main-page/wabi.svg	0.0 ms	1.2 KiB
edge.simpleswap.io/images/promo-main-page/fun.svg	0.0 ms	1.1 KiB
edge.simpleswap.io/images/currencies-logo/btc.svg	0.0 ms	1.1 KiB
edge.simpleswap.io/images/currencies-logo/usdcpoly.svg	0.0 ms	1.1 KiB
edge.simpleswap.io/images/currencies-logo/usd.svg	0.0 ms	1.0 KiB
edge.simpleswap.io/images/currencies-logo/ltc.svg	0.0 ms	1.0 KiB
edge.simpleswap.io/images/promo-main-page/ioc.svg	0.0 ms	1009 B
edge.simpleswap.io/images/currencies-logo/sol.svg	0.0 ms	1002 B
edge.simpleswap.io/images/promo-main-page/nxs.svg	0.0 ms	935 B
edge.simpleswap.io/images/currencies-logo/usdttrc20.svg	0.0 ms	821 B
edge.simpleswap.io/images/currencies-logo/usdt.svg	0.0 ms	816 B
edge.simpleswap.io/images/promo-main-page/torn.svg	0.0 ms	790 B
edge.simpleswap.io/images/currencies-logo/eur.svg	0.0 ms	780 B
edge.simpleswap.io/images/currencies-logo/usdtpoly.svg	0.0 ms	770 B
edge.simpleswap.io/images/promo-main-page/cag.svg	0.0 ms	684 B
edge.simpleswap.io/images/currencies-logo/ton.svg	0.0 ms	635 B
edge.simpleswap.io/images/currencies-logo/xrp.svg	0.0 ms	607 B
edge.simpleswap.io/images/promo-main-page/ybc.svg	0.0 ms	575 B
edge.simpleswap.io/images/currencies-logo/xmr.svg	0.0 ms	524 B
edge.simpleswap.io/images/currencies-logo/eth.svg	0.0 ms	381 B

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
Buy cryptocurrency with fiat currency `div.styles-module__xTLEyG__root > div.m_8bffd616 > div.styles-module__xTLEyG__image > img`	edge.simpleswap.io/images/illustrations/buy-with-fiat.webp	193.2 KiB	171.2 KiB
info.category3 preview `ul.styles-module__0OXq_G__root > li.styles-module__0OXq_G__item > div.styles-module__0OXq_G__image > img`	edge.simpleswap.io/images/illustrations/support.webp	31.3 KiB	29.5 KiB
info.category2 preview `ul.styles-module__0OXq_G__root > li.styles-module__0OXq_G__item > div.styles-module__0OXq_G__image > img`	edge.simpleswap.io/images/illustrations/wide-choice.webp	23.0 KiB	21.3 KiB
info.category1 preview `ul.styles-module__0OXq_G__root > li.styles-module__0OXq_G__item > div.styles-module__0OXq_G__image > img`	edge.simpleswap.io/images/illustrations/privacy.webp	22.6 KiB	20.9 KiB
info.category4 preview `ul.styles-module__0OXq_G__root > li.styles-module__0OXq_G__item > div.styles-module__0OXq_G__image > img`	edge.simpleswap.io/images/illustrations/safety.webp	18.9 KiB	17.9 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Diagnostics

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reason	Failure type
Pages with cache-control:no-store header cannot enter back/forward cache.	Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.	Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.	Not actionable

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 47.6 KiB

URL	Transfer Size	Est Savings
:root,:host{color-scheme:var(--mantine-color-scheme)} …	55.6 KiB	47.6 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 20.9 KiB

URL	Transfer Size	Est Savings
edge.simpleswap.io/exchange-frontend/static/_next/static/chunks/10rj~6lwyv6l~.js	67.6 KiB	20.9 KiB

More information about the performance of your application. These numbers don't directly affect the Performance score.

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 716 ms

URL	Time Spent
simpleswap.io/?id=jvw7l9dn7nk6aj4j	816 ms

●Time to Interactive 1.9 s

●Max Potential First Input Delay 90 ms

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,098 KiB

●JavaScript execution time 0.6 s

●Minimizes main-thread work 1.9 s

●Avoid long main-thread tasks 4 long tasks found

●Image elements have explicit `width` and `height`

●Network Requests

●Network Round Trip Times 60 ms

●Server Backend Latencies 300 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.styles-module__lWGaJG__container > div.m_4081bf90 > div.m_4081bf90 > button#mantine-cbnzq6qn7-target `div.styles-module__lWGaJG__container > div.m_4081bf90 > div.m_4081bf90 > button#mantine-cbnzq6qn7-target`
div.styles-module__lWGaJG__container > div.m_4081bf90 > div.m_4081bf90 > button#mantine-1ing9xzep-target `div.styles-module__lWGaJG__container > div.m_4081bf90 > div.m_4081bf90 > button#mantine-1ing9xzep-target`

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634 `div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634`
div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634 `div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634`
div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634 `div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634`

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Sign up `div.m_4081bf90 > a.mantine-focus-auto > span.m_80f1301b > span.theme-module__GV-Iya__label`
BTC `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
BTC `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
ETH `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
SOL `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
ETH `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
ETH `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
SOL `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
ETH `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
XMR `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
BTC `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
SOL `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
ETH `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
BTC `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
MATIC `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
SOL `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
BTC `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
ETH `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
MATIC `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
MATIC `div.m_8bffd616 > div.m_8bffd616 > div.m_347db0ec > span.m_5add502a`
Create fiat exchange `div.m_8bffd616 > a.mantine-focus-auto > span.m_80f1301b > span.theme-module__GV-Iya__label`
Create an exchange `div.m_8bffd616 > a.mantine-focus-auto > span.m_80f1301b > span.theme-module__GV-Iya__label`
Watch a video guide `div.m_8bffd616 > button.mantine-focus-auto > span.m_80f1301b > span.theme-module__GV-Iya__label`

These are opportunities to improve the legibility of your content.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Top pairs on SimpleSwap `div.theme-module__xVqVYG__container > div.theme-module__xVqVYG__container > div.m_8bffd616 > h4.theme-module__xVqVYG__heading`

These are opportunities to improve keyboard navigation in your application.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Touch targets have sufficient size and spacing.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●ARIA IDs are unique

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

○Links are distinguishable without relying on color.

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
simpleswap.io/api/v4/exchanges-new/header	`Failed to load resource: the server responded with a status of 400 ()`
simpleswap.io/api/v4/customers/profile?_=1787833848091	`Failed to load resource: the server responded with a status of 401 ()`
simpleswap.io/api/v4/customers/profile?_=1787833848091	`Failed to load resource: the server responded with a status of 401 ()`

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Crawling and Indexing

Search engines are unable to include your pages in search results if they don't have permission to crawl them. Learn more about crawler directives.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Blocking Directive Source
`x-robots-tag: noindex, nofollow`

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

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
simpleswap.io/contacts	More

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634 `div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634`
div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634 `div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634`
div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634 `div.styles-module__dlespW__content_wrapper > div.styles-module__dlespW__mobile_app_links > a.mantine-focus-auto > img.m_9e117634`

hreflang links tell search engines what version of a page they should list in search results for a given language or region. Learn more about `hreflang`.

Why this matters

Performance issues directly impact user engagement and conversion rates.


`Link: <https://simpleswap.io/cn>; rel="alternate"; hreflang="cn"`

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

○Structured data is valid

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links are crawlable

●robots.txt is valid

●Document has a valid `rel=canonical`