Your app works perfectly.
On your machine.

We're building the definitive browser-native chaos engine. Inject real-world failure — latency spikes, API sabotage, device constraints — into any frontend. No code changes. No SDK. Just truth.

Request Early Access
qwilow — chaos session active
▸qwilow chaos-engine --preset "rush-hour" --intensity 0.8
— session started —
localhost:3000 is not the real world
Works on my machine™ is not QA
Your staging environment lied to you
Users don't have 16GB RAM and 1Gbps fibre
That loading spinner? Your user saw a blank screen.
Your 200 OK had an empty body. Nobody noticed.
The 500 error happened on a Saturday. At 2am.
Your WebSocket reconnected. Your UI didn't.
localhost:3000 is not the real world
Works on my machine™ is not QA
Your staging environment lied to you
Users don't have 16GB RAM and 1Gbps fibre
That loading spinner? Your user saw a blank screen.
Your 200 OK had an empty body. Nobody noticed.
The 500 error happened on a Saturday. At 2am.
Your WebSocket reconnected. Your UI didn't.
localhost:3000 is not the real world
Works on my machine™ is not QA
Your staging environment lied to you
Users don't have 16GB RAM and 1Gbps fibre
That loading spinner? Your user saw a blank screen.
Your 200 OK had an empty body. Nobody noticed.
The 500 error happened on a Saturday. At 2am.
Your WebSocket reconnected. Your UI didn't.
The Developer Bubble

You build on a MacBook Pro
with perfect WiFi.

Your users are on a 4-year-old Android, riding the subway, fighting 2 bars of signal. They're loading your checkout page on coffee shop WiFi that drops every 30 seconds.

That gap between your dev setup and their reality? That's where your bugs live. And you'll never find them by refreshing localhost.

Specs
Your Setup
Their Reality
Device
MacBook Pro M3 14"
Tecno Spark 10C
CPU
Apple M3 (8-core)
Helio G37 (2019 chip)
RAM
18GB Unified Memory
4GB (≈1.1GB free at runtime)
Storage
SSD — 3,400MB/s read
eMMC 5.1 — 280MB/s read
Network
900Mbps Fibre (Ethernet)
MTN 4G (avg 6Mbps, spikes to 0)
Latency
~2ms to localhost
~340ms to nearest CDN edge
Browser
Chrome 124 — Dev build
Chrome 96 — Auto-update disabled
OS
macOS Sonoma 14.4
Android 11 Go (patched 2022)
Battery
Plugged in, 100%
41% — Low power mode active
Screen
3024×1964 Liquid Retina
720×1612 (720p, 60Hz)
Apps running
VS Code, browser, Slack
14 background apps, 3 services
Time of day
10am, home office
7pm, commuting on BRT
Results
LCP0.3s
Errors0
Score98 · S
LCP11.2s
Errors7
Score31 · F
01

SEQUENCE_01

Join the waitlist

Sign up for early access. Be first when we launch.

02

SEQUENCE_02

Choose a scenario

Pick Rush Hour, Black Friday, or build your own chaos config.

03

SEQUENCE_03

Break things

Watch your app fail. Fix it. Ship with confidence.

The Chaos Toolkit

What Qwilow will break.

Network Sabotage

Real chaos. Zero code.

Latency Jitter

Random delays, 0–8000ms

Error Injection

500s, 429s, 503s on real API calls

Zombie Responses

200 OK. Empty body. Silent failure.

UI Stress Tests

Break your layouts.

Layout Shift Injector

Random padding chaos on rendered elements

Button Double-Submit

Tests your submit guards under pressure

Input Corruption

Appends garbage to form fields on type

Device Reality

Test for the 99%.

CPU Throttle Bursts

Blocks main thread for 500ms every 10s

Budget Phone Mode

$120 Android profile. DOM inflation.

Locale Override

Force RTL, Arabic numerals, local formats

Asset Blocker

Kill the fluff.

Resource Denial

Kills CSS, fonts, images at a rate you control (0–100%)

CDN Failure

Simulates assets failing to load from secondary domains

Auth Chaos

Test session logic.

JWT Expiry Jump

Injects 401 after N minutes. Tests recovery.

Silent Sign-out

Clears auth tokens mid-session to test UI state.

WebSocket Drops

Realtime resilience.

Conn Drops

Randomly disconnects WS connections. Does your UI recover?

Message Lag

Simulates delayed receipt of critical socket events.

Built-in Scenarios

Five scenarios, ready on day one.

Pre-configured chaos profiles for the most common real-world conditions. Build unlimited custom scenarios on Pro and above.

Module_ID 04x
Ready

RUSH HOUR

"Congested mobile network. Random spikes, drops, and full disconnects."

delay0ms → 8000ms
errors15% rate
assets5% blocked
websocketchaos enabled
Module_ID 04x
Ready

BLACK FRIDAY LOAD

"High traffic. APIs slow down, 429s appear, CDN starts struggling."

delay1000ms → 4000ms
errors20% (429, 503)
assets8% blocked
Module_ID 04x
Ready

BUDGET PHONE

"Simulate a $120 Android on a slow connection."

delay500ms → 3000ms
cputhrottle bursts on
dominflation enabled
Module_ID 04x
Ready

CORPORATE VPN

"High latency, CORS hiccups, auth drops after 2 minutes."

delay800ms → 2500ms
auth401 after 2min
websocketchaos enabled
Module_ID 04x
Ready

GENTLE MODE

"Light chaos. Good for projects that have never been tested."

delay0ms → 500ms
errors5% rate
assetsblocked 0%
The Resilience Engine

Quantify your
frontend robustness.

Every chaos session calculates a unique Resilience Score. Know exactly where your app fails before your users feel it.

S
98.2Resilience Index

"Grade: S — App handled everything. Ship it."

SResilience Report v1.2
Rush Hour
Simulation Complete
Latent ResponseResolved
API Timeout (408)Buffered
Asset Blocked (404)Handled

"Ship with confidence, or don't ship at all."

Anticipated Release: Q3 2026

The full toolkit.
No compromises.

We're building the most advanced chaos engineering suite ever made for the frontend. Stop waiting for QA to find bugs. Break them yourself.

Explore FeaturesJoin Waitlist
2026
FAQ

Common questions.

Pre-Launch Sequence

Secure your access
to the 2026 sequence.

Join the elite circle of developers building a more resilient web. Early access slots are limited and distributed by expertise.

Identity
Context