Record → mock in three steps
Capture a real request, convert it to a mock, edit a field. The first mock just works.
record & replay
NR
Developer tools · network
NetworkRules intercepts, rewrites and mocks network requests — cleanly.
Record real traffic, turn a request into a mock, and change one field. No ads, no telemetry — the clean alternative for developers who left Requestly and ModHeader.
product screenshot · NetworkRules panel
product screenshot · NetworkRules popup
product screenshot · NetworkRules devtools
Proof it took effect
A hit-log and toolbar badge show exactly which requests were rewritten — mocks don't show in DevTools.
hit counterWhat Pro buys
Dynamic response scripts, cloud-synced rule sets, and team presets.
from $4/moPricing
Buy right here — checkout is handled by Paddle.
Free
$0
Add to Chrome- Unlimited rules
- 20 mock endpoints
- Header / redirect / block
- Import from Requestly & ModHeader
Pro
$3.99/mo $29/yr $59one-time
Upgrade to ProSecure checkout by Paddle · cards, Alipay, WeChat Pay
- Everything in Free
- Unlimited mock endpoints
- Dynamic response scripts
- Cloud-synced rule sets
Team
$8/seat/mo
Contact sales- Everything in Pro
- Shared team rule sets
- Centralized billing
- 10+ seats
Unlock Pro across all our paid extensions — and every new one we ship. See the bundle →
Private by construction
local processing · zero tracking · no data sold
- No analytics
- No telemetry
- No third-party SDKs
- Data never leaves the browser
Questions people ask
Why don't my mocks show in the DevTools Network tab?
The platform doesn't surface them there. NetworkRules gives you its own hit-log and a badge count as the proof of effect.
Can I import my Requestly / ModHeader rules?
Yes — a one-click importer maps them over and honestly flags anything unsupported.
Does it work in Firefox?
Yes. On Firefox the network layer has no blind spots; on Chromium some request types are out of scope, and the UI tells you which.