microsoft.com

https://www.microsoft.com/

Ranks Overall #1,499 Big Tech #14

Data from Sep 15, 2026, 5:54 AM UTC 2h old Measured every 2 days · 11 runs since Aug 28, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Scoring Calculator · Wayback Machine

This URL redirects to https://www.microsoft.com/en-us.

The site’s front door pointing at the page it serves there — a locale or CMS landing path, not a move. The origin is still the address of the site, so history stays under it rather than forking to a path that depends on where the measurement ran. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Uses ReactLit 3.3.3

Filmstrip LAB Throttled

How the page drew during the measured load, at 9 points across 40.07 s. Compare this filmstrip against another site.

5.01 s
10.02 s
15.03 s
20.04 s
25.05 s
27.42 s
30.05 s
35.06 s
40.07 s

Lighthouse Scores LAB Simulated

Performance

↓ -2 (-7.1%)

100

Accessibility

no change

Best Practices

no change

SEO

no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-08-17 → 2026-09-13), origin-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	26.23 s poor	↑ +3051 ms (+13.2%) 22.10 s – 43.03 s	3.08 s needs work	63.6% 22.1% 14.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	1.26 s poor	56.3% 11.9% 31.8%
CLS CWV Cumulative Layout Shift	0.013 good	↓ -0.002 (-13.3%) 0 – 0.601	0.110 needs work	74.4% 10.9% 14.7%
TBT Total Blocking Time	2.74 s poor	↑ +403 ms (+17.2%) 1.89 s – 3.05 s	n/a	—
FCP First Contentful Paint	6.44 s poor	↑ +1612 ms (+33.4%) 4.82 s – 9.71 s	2.49 s needs work	56.7% 25.9% 17.4%
Speed Index	12.23 s poor	↑ +338 ms (+2.8%) 11.74 s – 13.33 s	n/a	—
TTFB Time to First Byte	645 ms good	↓ -39 ms (-5.7%) significant 638 ms – 689 ms	1.37 s needs work	43.6% 42.4% 14.1%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

26.23 s poor

↑ +3051 ms (+13.2%) 22.10 s – 43.03 s

3.08 s needs work

63.6% 22.1% 14.3%

INP CWV Interaction to Next Paint — field only, no lab run can measure it

n/a

—

1.26 s poor

56.3% 11.9% 31.8%

CLS CWV Cumulative Layout Shift

0.013 good

↓ -0.002 (-13.3%) 0 – 0.601

0.110 needs work

74.4% 10.9% 14.7%

TBT Total Blocking Time

2.74 s poor

↑ +403 ms (+17.2%) 1.89 s – 3.05 s

n/a

—

FCP First Contentful Paint

6.44 s poor

↑ +1612 ms (+33.4%) 4.82 s – 9.71 s

2.49 s needs work

56.7% 25.9% 17.4%

Speed Index

12.23 s poor

↑ +338 ms (+2.8%) 11.74 s – 13.33 s

n/a

—

TTFB Time to First Byte

645 ms good

↓ -39 ms (-5.7%) significant 638 ms – 689 ms

1.37 s needs work

43.6% 42.4% 14.1%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

resource load duration 14.27 s

element render delay 11.91 s

time to first byte 1.24 s

LCP LAB Simulated vs LCP FIELD

Lab 26.23 s

Field p75 3.08 s

The lab LCP is 8.51× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	6.62 MB	↑ +20.7 kB (+0.3%) 6.59 MB – 7.67 MB
Requests	296	↑ +34 (+13%) 259 – 296
Third-party Weight	551 kB	↑ +2.0 kB (+0.4%) 519 kB – 551 kB
Third-party CPU	526 ms	↑ +61 ms (+13.2%) 234 ms – 1.07 s
Unused JS	638 kB	↓ -1.5 kB (-0.2%) 634 kB – 640 kB
Unused CSS	246 kB	→ no change 198 kB – 247 kB

Metric

Value

Change / range

Trend

Page Weight

6.62 MB

↑ +20.7 kB (+0.3%) 6.59 MB – 7.67 MB

Requests

296

↑ +34 (+13%) 259 – 296

Third-party Weight

551 kB

↑ +2.0 kB (+0.4%) 519 kB – 551 kB

Third-party CPU

526 ms

↑ +61 ms (+13.2%) 234 ms – 1.07 s

Unused JS

638 kB

↓ -1.5 kB (-0.2%) 634 kB – 640 kB

Unused CSS

246 kB

→ no change 198 kB – 247 kB

By resource type

Type	Share	Size	Requests
image	49.7%	3.19 MB	48
script	41.8%	2.68 MB	167
stylesheet	4.4%	280 kB	13
font	2.8%	181 kB	8
other	0.7%	43.8 kB	57
document	0.7%	43.0 kB	2
Total		6.62 MB	296

Third parties 12 entities

Entity	Transfer	Size	Main thread Simulated
Clicktale	script	220 kB	283 ms
s-microsoft.com	font	180 kB	0 ms
Google Tag Manager	script	90.1 kB	23 ms
Clarity	script	36.7 kB	212 ms
ContentSquare		21.1 kB	7 ms
All 12		551 kB	526 ms

Entity

Transfer

Size

Main thread Simulated

Clicktale

script

220 kB

283 ms

s-microsoft.com

font

180 kB

0 ms

Google Tag Manager

script

90.1 kB

23 ms

Clarity

script

36.7 kB

212 ms

ContentSquare

21.1 kB

7 ms

All 12

551 kB

526 ms

Without JavaScript

This page is client rendered.

Nothing was painted until the scripts ran. This is a web performance and robustness issue!

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

86.6% of pixels differ — the page changes substantially. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric	Value	Change / range
Main Thread Work	30.08 s	↑ +5740 ms (+23.6%) 13.12 s – 36.23 s
Long Tasks	20	→ no change 20 – 20
DOM Elements	4,022	↓ -1 3,950 – 4,167
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	1	→ no change 1 – 1
A11y Failures	1	→ no change 1 – 1
A11y Failing Nodes	4	→ no change 4 – 5

Metric

Value

Change / range

Trend

Main Thread Work

30.08 s

↑ +5740 ms (+23.6%) 13.12 s – 36.23 s

Long Tasks

→ no change 20 – 20

DOM Elements

4,022

↓ -1 3,950 – 4,167

Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)

→ no change 1 – 1

A11y Failures

→ no change 1 – 1

A11y Failing Nodes

→ no change 4 – 5

Main thread work

Task	Share	Duration Simulated
script evaluation	81%	24.29 s
other	9%	2.81 s
style layout	5%	1.58 s
script parse compile	2%	737 ms
garbage collection	1%	274 ms
parse HTML	1%	244 ms
paint composite render	0%	143 ms
Total		30.08 s

Task

Time

Duration Simulated

script evaluation

81%

24.29 s

other

2.81 s

style layout

1.58 s

script parse compile

737 ms

garbage collection

274 ms

parse HTML

244 ms

paint composite render

143 ms

Total

30.08 s

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 1580 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

minor empty-heading — Headings should not be empty 1 node

Accessibility failures 1 of 36 audits

label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 4 nodes

Best Practices failures 5 of 20 audits

deprecations — Uses deprecated APIs 1 item
third-party-cookies — Uses third-party cookies 22 items
errors-in-console — Browser errors were logged to the console 7 items
inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 1 item
valid-source-maps — Missing source maps for large first-party JavaScript 2 items

SEO failures 1 of 10 audits

link-text — Links do not have descriptive text 5 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 7 console errors

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending	LCP	INP	CLS	FCP	TTFB
2026-09-05	3.07 s	1.28 s	0.110	2.49 s	1.38 s
2026-08-29	3.08 s	1.32 s	0.110	2.49 s	1.39 s
2026-08-22	3.10 s	1.43 s	0.110	2.50 s	1.39 s
2026-08-15	3.13 s	1.50 s	0.100	2.53 s	1.40 s
2026-08-08	3.15 s	1.50 s	0.100	2.56 s	1.40 s
2026-08-01	3.16 s	1.54 s	0.110	2.59 s	1.39 s
2026-07-25	3.15 s	1.55 s	0.120	2.61 s	1.39 s
2026-07-18	3.14 s	1.56 s	0.130	2.63 s	1.40 s
2026-07-11	3.13 s	1.64 s	0.130	2.65 s	1.41 s
2026-07-04	3.13 s	1.66 s	0.130	2.66 s	1.42 s
2026-06-27	3.24 s	1.60 s	0.150	2.75 s	1.49 s
2026-06-20	3.50 s	1.50 s	0.160	2.93 s	1.64 s

Week ending

LCP

INP

CLS

FCP

TTFB

2026-09-05

3.07 s

1.28 s

0.110

2.49 s

1.38 s

2026-08-29

3.08 s

1.32 s

0.110

2.49 s

1.39 s

2026-08-22

3.10 s

1.43 s

0.110

2.50 s

1.39 s

2026-08-15

3.13 s

1.50 s

0.100

2.53 s

1.40 s

2026-08-08

3.15 s

1.50 s

0.100

2.56 s

1.40 s

2026-08-01

3.16 s

1.54 s

0.110

2.59 s

1.39 s

2026-07-25

3.15 s

1.55 s

0.120

2.61 s

1.39 s

2026-07-18

3.14 s

1.56 s

0.130

2.63 s

1.40 s

2026-07-11

3.13 s

1.64 s

0.130

2.65 s

1.41 s

2026-07-04

3.13 s

1.66 s

0.130

2.66 s

1.42 s

2026-06-27

3.24 s

1.60 s

0.150

2.75 s

1.49 s

2026-06-20

3.50 s

1.50 s

0.160

2.93 s

1.64 s

Runs

Every stored run for this URL, newest first.

When Scores Perf LCP CLS TBT Weight Runs Spread Bench Took Archive

Sep 15, 2026, 5:54 AM UTC 26 26.23 s 0.013 2.74 s 6.62 MB 3/3 ±22 2,476 0% 152.4s Wayback

Sep 13, 2026, 3:31 AM UTC 28 23.18 s 0.015 2.34 s 6.60 MB 3/3 ±2 2,983 +20% 147s Wayback

Sep 11, 2026, 3:12 AM UTC 4 37.73 s 0.601 2.65 s 6.59 MB 3/3 ±24 2,248 -9% 116.2s Wayback

Sep 8, 2026, 11:52 PM UTC 28 33.28 s 0 1.89 s 6.81 MB 3/3 ±3 2,977 +20% 72.1s Wayback

Sep 6, 2026, 11:41 PM UTC 27 27.01 s 0.011 2.72 s 7.48 MB 3/3 ±22 2,453 -1% 82.8s Wayback

Sep 4, 2026, 9:25 PM UTC 26 43.03 s 0.053 2.91 s 7.67 MB 3/3 ±22 2,545 +3% 88s Wayback

Sep 4, 2026, 10:49 AM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 40.1s

Sep 3, 2026, 6:53 AM UTC 27 34.23 s 0.008 2.09 s 7.48 MB 3/3 ±2 3,266 +32% 72.4s Wayback

Sep 2, 2026, 3:03 AM UTC 27 24.85 s 0.013 2.77 s 7.49 MB 3/3 ±22 2,351 -5% 88.5s Wayback

Aug 31, 2026, 9:37 PM UTC 26 27.18 s 0.011 3.05 s 7.53 MB 3/3 ±24 2,465 -1% 88.3s Wayback

Aug 28, 2026, 5:42 PM UTC 27 22.10 s 0.025 2.73 s 7.08 MB 3/3 ±23 2,313 -7% 93.4s Wayback

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Sep 15, 2026, 5:54 AM UTC	26	26.23 s	0.013	2.74 s	6.62 MB	3/3	±22	2,476 0%	152.4s	Wayback
Sep 13, 2026, 3:31 AM UTC	28	23.18 s	0.015	2.34 s	6.60 MB	3/3	±2	2,983 +20%	147s	Wayback
Sep 11, 2026, 3:12 AM UTC	4	37.73 s	0.601	2.65 s	6.59 MB	3/3	±24	2,248 -9%	116.2s	Wayback
Sep 8, 2026, 11:52 PM UTC	28	33.28 s	0	1.89 s	6.81 MB	3/3	±3	2,977 +20%	72.1s	Wayback
Sep 6, 2026, 11:41 PM UTC	27	27.01 s	0.011	2.72 s	7.48 MB	3/3	±22	2,453 -1%	82.8s	Wayback
Sep 4, 2026, 9:25 PM UTC	26	43.03 s	0.053	2.91 s	7.67 MB	3/3	±22	2,545 +3%	88s	Wayback
Sep 4, 2026, 10:49 AM UTC	`TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse.`	40.1s
Sep 3, 2026, 6:53 AM UTC	27	34.23 s	0.008	2.09 s	7.48 MB	3/3	±2	3,266 +32%	72.4s	Wayback
Sep 2, 2026, 3:03 AM UTC	27	24.85 s	0.013	2.77 s	7.49 MB	3/3	±22	2,351 -5%	88.5s	Wayback
Aug 31, 2026, 9:37 PM UTC	26	27.18 s	0.011	3.05 s	7.53 MB	3/3	±24	2,465 -1%	88.3s	Wayback
Aug 28, 2026, 5:42 PM UTC	27	22.10 s	0.025	2.73 s	7.08 MB	3/3	±23	2,313 -7%	93.4s	Wayback

Stack

Filmstrip LAB 🐢 Throttled

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB FIELD

LCP Subparts LAB 🐢 Throttled

LCP LAB 🤖 Simulated vs LCP FIELD

Page weight

By resource type

Third parties 12 entities

Without JavaScript

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 1 of 36 audits

Best Practices failures 5 of 20 audits

SEO failures 1 of 10 audits

Hygiene

Measurement log

Field history 25 weeks

Runs

Filmstrip LAB Throttled

Lighthouse Scores LAB Simulated

LCP Subparts LAB Throttled

LCP LAB Simulated vs LCP FIELD