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.
Recommended for your browser
Choose where to install
Official stores are the safest choice and provide automatic updates.
CH
Chrome
Detected: Chrome
Other browsers
Developer / manual installation
Use the ZIP only when an official store is unavailable.
- Unzip the file, open the browser's Extensions page, enable Developer mode, then choose Load unpacked.
Manual installations do not update automatically. ZIP files are not one-click installers.
product screenshot · NetworkRules editor
product screenshot · NetworkRules rules
product screenshot · NetworkRules settings
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.
Pro from $3.99/moPricing
Buy right here — checkout is handled by Paddle.
Free
$0
Choose where to install- Unlimited rules
- 20 mock endpoints
- Header / redirect / block
- Import from Requestly & ModHeader
Pro
$3.99/mo $29/yr $59one-time
Paid account access is currently available in the Chrome version only.
Secure checkout by Paddle · cards, Alipay, WeChat Pay
- Everything in Free
- Unlimited mock endpoints
- Dynamic response scripts
- Cloud-synced rule sets
Team
Coming soon
Contact sales- Everything in Pro
- Shared team rule sets
- Centralized billing
- 10+ seats
The bundle is not available yet. Individual paid extensions are available now; join the waitlist for bundle updates. Join waitlist →
Private by construction
local-first · optional online features disclosed · no data sold
- No analytics
- No telemetry
- No third-party SDKs
- Core processing stays local; optional sync, backup, AI or sharing connects only when you enable it
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.
Questions & suggestions
Ask a question, request a feature or report an issue. We read every message and publish the useful ones with our answer.
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