Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.28 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
30.86 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.01 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.046
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
10.62 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
30.86 s
Page Load Progression
FPage Weight BudgetAction4.0 MB transferred, 205 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction12990ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://cdn.wetransfer.com/_next/static/chunks/framework-ca2f8fe4a887959b.js | 2996ms | 2659ms | 71ms | 3rd |
| Unattributable | 1972ms | 159ms | 0ms | 3rd |
| https://wetransfer.com/ | 1140ms | 33ms | 2ms | 3rd |
| https://cdn.wetransfer.com/_next/static/chunks/7354.30a5a0411a6507e5.js | 1080ms | 734ms | 283ms | 3rd |
| https://tagging.wetransfer.com/gtm.js?id=GTM-NS54WBW | 916ms | 709ms | 116ms | 3rd |
| https://cdn.wetransfer.com/_next/static/chunks/1639.4df9c4041275b2cc.js | 875ms | 765ms | 58ms | 3rd |
| https://scripts.clarity.ms/0.8.59/clarity.js | 514ms | 461ms | 16ms | 3rd |
| https://tagging.wetransfer.com/gtag/js?id=G-0M019DTWVR&cx=c>m=4e64h1&sign=4d96752b4df1e138a9efd9654e79e37e67731d66d3b048163e825ffafd412ba3_20260421 | 496ms | 410ms | 60ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202512.1.0/otBannerSdk.js | 461ms | 291ms | 57ms | 3rd |
| https://js.stripe.com/v3 | 428ms | 316ms | 107ms | 3rd |
Showing top 10 of 23 scripts
FJS BundlesAction66 scripts, 1.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.wetransfer.com/_next/static/chunks/7354.30a5a0411a6507e5.js | 805 KB | 274 KB (34%) | ✓ | 3rd |
| https://js.stripe.com/v3 | 220 KB | 160 KB (73%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 0 KB | 74 KB (78%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 74 KB (78%) | ✓ | 3rd |
| https://tagging.wetransfer.com/gtm.js?id=GTM-NS54WBW | 0 KB | 71 KB (41%) | ✓ | 3rd |
| https://tagging.wetransfer.com/gtm.js?id=GTM-NS54WBW | 173 KB | 71 KB (41%) | ✓ | 3rd |
| https://cdn.wetransfer.com/_next/static/chunks/9338.993d9483534aa86f.js | 123 KB | 68 KB (55%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202512.1.0/otBannerSdk.js | 126 KB | 66 KB (52%) | ✓ | 3rd |
| https://cdn.wetransfer.com/_next/static/chunks/b7bfefd8.9b1f2da38a41583d.js | 71 KB | 62 KB (87%) | ✓ | 3rd |
| https://cdn.wetransfer.com/_next/static/chunks/7242.f78322a12cd2966a.js | 135 KB | 51 KB (38%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction205 resources · 4.0 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 205 resources | 4.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization7 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (91 KB)PASS
Web fonts
4
91 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
Fixing the unchecked items could save ~2 KB and ~4 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints2 hints, 0 missing preconnectsPASS
Current Resource Hints
2 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall205 requests over 6972msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.wetransfer.com cdn.wetransfer.com | Other | 2996ms | 0 KB | — | $40/mo | Costly |
Unattributable Unattributable | Other | 1972ms | 0 KB | — | $26/mo | Costly |
wetransfer.com wetransfer.com | Other | 1140ms | 8 KB | — | $15/mo | Costly |
cdn.wetransfer.com cdn.wetransfer.com | Other | 1080ms | 805 KB | 34% | $14/mo | Costly |
tagging.wetransfer.com tagging.wetransfer.com | Other | 916ms | 0 KB | 41% | $12/mo | Costly |
cdn.wetransfer.com cdn.wetransfer.com | Other | 875ms | 85 KB | 58% | $12/mo | Costly |
Microsoft Clarity scripts.clarity.ms | Session Replay | 514ms | 0 KB | — | $7/mo | Costly |
tagging.wetransfer.com tagging.wetransfer.com | Other | 496ms | 160 KB | — | $7/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 461ms | 126 KB | 52% | $6/mo | Essential |
Stripe js.stripe.com | Payment | 428ms | 220 KB | 73% | $6/mo | Essential |
cdn.wetransfer.com cdn.wetransfer.com | Other | 303ms | 123 KB | 55% | $4/mo | Costly |
cdn.wetransfer.com cdn.wetransfer.com | Other | 249ms | 0 KB | 77% | $3/mo | Costly |
cdn.wetransfer.com cdn.wetransfer.com | Other | 236ms | 0 KB | 54% | $3/mo | Costly |
apps.rokt.com apps.rokt.com | Other | 217ms | 21 KB | — | $3/mo | Costly |
cdn.wetransfer.com cdn.wetransfer.com | Other | 200ms | 135 KB | 38% | $3/mo | Costly |
Bing UET bat.bing.com | Advertising | 169ms | 0 KB | — | $2/mo | Optional |
accounts.google.com accounts.google.com | Other | 161ms | 0 KB | 78% | $2/mo | Optional |
cdn.wetransfer.com cdn.wetransfer.com | Other | 158ms | 2 KB | — | $2/mo | Optional |
cdn.wetransfer.com cdn.wetransfer.com | Other | 121ms | 131 KB | 23% | $2/mo | Optional |
cdn.wetransfer.com cdn.wetransfer.com | Other | 110ms | 0 KB | 78% | $1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 83ms | 9 KB | — | $1/mo | Essential |
cdn.wetransfer.com cdn.wetransfer.com | Other | 55ms | 7 KB | — | $1/mo | Optional |
wetransfer.com wetransfer.com | Other | 51ms | 7 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- cdn.wetransfer.com adds 2996ms and costs ~$40/month
- Unattributable adds 1972ms and costs ~$26/month
- wetransfer.com adds 1140ms and costs ~$15/month
- cdn.wetransfer.com adds 1080ms and costs ~$14/month
- tagging.wetransfer.com adds 916ms and costs ~$12/month
- cdn.wetransfer.com adds 875ms and costs ~$12/month
- Microsoft Clarity adds 514ms and costs ~$7/month
- tagging.wetransfer.com adds 496ms and costs ~$7/month
- cdn.wetransfer.com adds 303ms and costs ~$4/month
- cdn.wetransfer.com adds 249ms and costs ~$3/month
- cdn.wetransfer.com adds 236ms and costs ~$3/month
- apps.rokt.com adds 217ms and costs ~$3/month
- cdn.wetransfer.com adds 200ms and costs ~$3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
cdn.wetransfer.com takes 2996ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 1972ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
wetransfer.com takes 1140ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
cdn.wetransfer.com takes 1080ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
tagging.wetransfer.com takes 916ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
cdn.wetransfer.com takes 875ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
58% of cdn.wetransfer.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Microsoft Clarity takes 514ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
tagging.wetransfer.com takes 496ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
52% of OneTrust's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
73% of Stripe's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
cdn.wetransfer.com takes 303ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
55% of cdn.wetransfer.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
cdn.wetransfer.com takes 249ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
77% of cdn.wetransfer.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
cdn.wetransfer.com takes 236ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
54% of cdn.wetransfer.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
apps.rokt.com takes 217ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
cdn.wetransfer.com takes 200ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
78% of accounts.google.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
78% of cdn.wetransfer.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev