h01.in/tools/ffmpeg

Ranks Overall #1,533 Astro Showcase #165

Data from Oct 2, 2026, 1:36 PM UTC 9h old Measured once a month · 1 run since Oct 2, 2026

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

This URL redirects to https://h01.in/tools/ffmpeg/.

The same URL in a different form — a trailing slash — so both are treated as one site rather than two: one history, measured once. 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

Built with Astro 5.16.4

Uses React

Hosted by Cloudflare

Lighthouse Scores LAB Simulated

Performance

no change

Accessibility

no change

100

Best Practices

no change

100

SEO

no change

Metrics LAB

No field data: the Chrome UX Report is not being collected for this project, so every figure below is from the Lighthouse run.

Metric	Lab Simulated
LCP CWV (estimate) Largest Contentful Paint	4.45 s poor	— 4.45 s – 4.45 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—
CLS CWV (estimate) Cumulative Layout Shift	0.306 poor	— 0.306 – 0.306
TBT Total Blocking Time	109 ms good	— 109 ms – 109 ms
FCP First Contentful Paint	2.13 s needs work	— 2.13 s – 2.13 s
Speed Index	2.13 s good	— 2.13 s – 2.13 s
TTFB Time to First Byte	477 ms good	— 477 ms – 477 ms

Metric

Lab Simulated

Value

Change / range

Trend

LCP CWV (estimate) Largest Contentful Paint

4.45 s poor

— 4.45 s – 4.45 s

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

n/a

—

CLS CWV (estimate) Cumulative Layout Shift

0.306 poor

— 0.306 – 0.306

TBT Total Blocking Time

109 ms good

— 109 ms – 109 ms

FCP First Contentful Paint

2.13 s needs work

— 2.13 s – 2.13 s

Speed Index

2.13 s good

— 2.13 s – 2.13 s

TTFB Time to First Byte

477 ms good

— 477 ms – 477 ms

LCP Subparts LAB Unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.

element render delay 132 ms

time to first byte 58 ms

Page weight

Metric	Value	Change / range
Page Weight	634 kB	— 634 kB – 634 kB
Requests	44	— 44 – 44
Third-party Weight	188 kB	— 188 kB – 188 kB
Third-party CPU	65 ms	— 65 ms – 65 ms
Unused JS	130 kB	— 130 kB – 130 kB
Unused CSS	0 B	— 0 B – 0 B

Metric

Value

Change / range

Trend

Page Weight

634 kB

— 634 kB – 634 kB

Requests

— 44 – 44

Third-party Weight

188 kB

— 188 kB – 188 kB

Third-party CPU

65 ms

— 65 ms – 65 ms

Unused JS

130 kB

— 130 kB – 130 kB

Unused CSS

0 B

— 0 B – 0 B

By resource type

Type	Share	Size	Requests
script	72.2%	456 kB	32
font	18.3%	116 kB	2
other	4.2%	26.3 kB	5
stylesheet	3.6%	22.7 kB	1
document	1.6%	10.3 kB	1
image	0.1%	868 B	1
Total		634 kB	44

Third parties 2 entities

Entity	Transfer	Size	Main thread Simulated
Google Tag Manager	script	178 kB	62 ms
Cloudflare		10.2 kB	3 ms
Total		188 kB	65 ms

Entity

Transfer

Size

Main thread Simulated

Google Tag Manager

script

178 kB

62 ms

Cloudflare

10.2 kB

3 ms

Total

188 kB

65 ms

Page health

Metric	Value	Change / range
Main Thread Work	1.35 s	— 1.35 s – 1.35 s
Long Tasks	3	— 3 – 3
DOM Elements	769	— 769 – 769
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	26	— 26 – 26
A11y Failures	4	— 4 – 4
A11y Failing Nodes	22	— 22 – 22

Metric

Value

Change / range

Trend

Main Thread Work

1.35 s

— 1.35 s – 1.35 s

Long Tasks

— 3 – 3

DOM Elements

769

— 769 – 769

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

— 26 – 26

A11y Failures

— 4 – 4

A11y Failing Nodes

— 22 – 22

Main thread work

Task	Share	Duration Simulated
script evaluation	41%	550 ms
other	35%	470 ms
style layout	9%	127 ms
paint composite render	6%	74 ms
script parse compile	5%	64 ms
parse HTML	3%	42 ms
garbage collection	2%	20 ms
Total		1.35 s

Task

Time

Duration Simulated

script evaluation

41%

550 ms

other

35%

470 ms

style layout

127 ms

paint composite render

74 ms

script parse compile

64 ms

parse HTML

42 ms

garbage collection

20 ms

Total

1.35 s

Axe violations axe-core 4.13.0, full rule set

26 violating nodes across 7 rules, 997 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

serious color-contrast — Elements must meet minimum color contrast ratio thresholds 19 nodes

Offending elements (5 of 19)

.hover\:text-foreground[data-slot="breadcrumb-link"][href$="tools"] > .gap-x-2 > span
```
<span>Tools</span>
```

.mb-6

<p class="text-muted-foreground mx-auto mb-6 max-w-2xl text-lg"> Modify video format, bitrate, frame rate, resolution, playback speed, codecs, and audio using a fully free, browser-side FFmpeg-powere…

.space-y-2:nth-child(1) > p

<p class="text-muted-foreground text-sm"> Upload your file and select a <strong>Preset</strong> from the dropdown. This is the fastest way to get results. We have presets for "Web Optimized" (small s…

.space-y-2:nth-child(1) > p > strong
```
<strong>Preset</strong>
```

.space-y-2:nth-child(2) > p

<p class="text-muted-foreground text-sm"> Use the tabs to adjust specific settings. You can change the <strong>CRF</strong> (quality vs size), strip audio tracks, or apply visual filters like brightn…

moderate landmark-unique — Landmarks should have a unique role or role/label/title (i.e. accessible name) combination 2 nodes
Offending elements
1. .divide-border
```
<header class="bg-background/50 divide-border z-50 divide-y backdrop-blur-sm xl:divide-none xl:bg-transparent xl:backdrop-blur-none sticky top-0">
```
2. .sm\:grid-cols-2 > div:nth-child(1) > nav
```
<nav class="flex flex-col gap-2">
```
moderate heading-order — Heading levels should only increase by one 1 node
Offending element
1. .space-y-2:nth-child(1) > h4
```
<h4 class="text-foreground font-bold">1. The Basics</h4>
```

critical label — Form elements must have labels 1 node

Offending element

input[accept="video/*,audio/*"]

<input accept="video/*,audio/*" tabindex="-1" type="file" style="border: 0px; clip: rect(0px, 0px, 0px, 0px); clip-path: inset(50%); height: 1px; margin: 0px -1px -1px 0px; overflow: hidden; padding:…

moderate landmark-banner-is-top-level — Banner landmark should not be contained in another landmark 1 node
Offending element
1. .z-10
```
<header class="bg-background/50 sticky top-0 z-10 backdrop-blur-md" data-astro-transition-persist="astro-l7r54iwe-2">
```

moderate landmark-no-duplicate-banner — Document should not have more than one banner landmark 1 node

Offending element

.divide-border

<header class="bg-background/50 divide-border z-50 divide-y backdrop-blur-sm xl:divide-none xl:bg-transparent xl:backdrop-blur-none sticky top-0">

serious link-name — Links must have discernible text 1 node
Offending element
1. .hover\:text-foreground[data-slot="breadcrumb-link"][href="/"]
```
<a data-slot="breadcrumb-link" class="hover:text-foreground transition-colors" href="/">
```

Accessibility failures 4 of 29 audits

color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 19 nodes
heading-order — Heading elements are not in a sequentially-descending order 1 node
label — Form elements do not have associated labels 1 node
link-name — Links do not have a discernible name 1 node

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Every stored run for this URL, newest first.

When	Scores	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 2, 2026, 1:36 PM UTC		66	4.45 s	0.306	109 ms	634 kB	3/3	±4	3,005 +21%	25.7s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Stack

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB

LCP Subparts LAB 🐇 Unthrottled

Page weight

By resource type

Third parties 2 entities

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 4 of 29 audits

Hygiene

Measurement log

Lighthouse Scores LAB Simulated

LCP Subparts LAB Unthrottled