API Waste Analysis
See bytes shipped vs. used across your entire API surface.
Data Received
11.6 KB
91 fields
Data Used by UI
123 B
3 fields
Waste
99%
11.5 KB
11.5 KB
Wasted (99%)
of 11.6 KB received
UnusedUsed
Chrome DevTools extension
Fix unused API fields instantly.
Monitor real UI field access and eliminate wasted payloads from your APIs.
Open sourceNo backend changesWorks with fetch/XHR
FEATURES
Everything slowing your APIs down.
Overfetch analyzes every response and surfaces what's wasted, what's duplicated, and what you can fix.
Unused Fields
Highlight every JSON key your UI never reads.
GET /api/users/88213.4 kB • 142 ms
{
"id": 8821,USED
"name": "Alex Chen",USED
"email": "alex@acme.io",USED
"avatar_url": "https://...",UNUSED
"created_at": "2024-01-15",UNUSED
"plan": "pro",USED
"billing_address": { ... },UNUSED
"preferences": { ... }UNUSED
}
Duplicate Requests
Spot the same call fired multiple times.
GET /api/users3 duplicates
3.2 kB09:41:022001.1 kB142 ms
09:41:032001.1 kB138 ms
09:41:042001.0 kB145 ms
Payload Structure
Inspect nested responses without leaving DevTools.
USED
USED
UNUSED
UNUSED
Optimization Hints
Endpoint-level suggestions for frontend and backend.
High impact
Remove 4 unused fields from GET /api/users. Could save 1.2 KB (88%) per request.
Stop shipping data nobody reads.
Install once. Open DevTools. See your waste.