Install required
- Requestr
- None — open a browser tab
- Postman
- Desktop app or web app
- Insomnia
- Desktop app download
Browser-native API client
Send a GET in seconds. No account, no install.
Open a tab and test any HTTP, GraphQL, WebSocket & Socket.IO API — no download, no sign-up, and nothing ever leaves your browser.
No sign-up · Free & open source · Works in any browser
GET│{{BASE_URL}}/users
Headers
AuthorizationBearer ••••••••••
Acceptapplication/json
200 OK38 ms · 1.2 kB
[
{
"id": 1,
"name": "Alice",
"role": "admin"
}
]
env: staging✓ data stays in your browser
requestr.manifest·read-onlylocal
No install
install: null,
No account
account: null,
Zero setup
setup_time: 0ms,
Privacy-first
data_location: "browser-only",
// your requests never leave this tab
Features
Tools the desktop clients skip. Zero bloat.
Transform, compare, and visualize JSON, share requests as links, and more — rarely found in a browser-based API client.
Transform Playground
Filter and reshape JSON with JSONPath or JavaScript. Live output, AI expression suggest, and a dedicated workspace.
Method-driven theming
Every HTTP method has its own color. GET is emerald, POST is blue, DELETE is red — your API is always scannable.
JSON Compare
Side-by-side JSON diff with change-only tree view. Seed from any response and spot regressions instantly.
JSON Visualize
Interactive node graph from JSON, YAML, or CSV. Zoom, search, and rotate layouts to explore complex payloads.
Shareable request links
Generate a link that pre-loads method, URL, headers, and body. No account, no export — just paste and send.
Dark, light & accent themes
System-aware dark/light mode plus custom accent colors. Persistent across sessions with zero flicker.
Compare
How Requestr compares
Built because desktop clients got slow and put basic testing behind a sign-up. Here's how it stacks up.
100% local
Requests run in your browser. Nothing is sent to our servers.
Account required
- Requestr
- No
- Postman
- Optional (sign-in for sync & collections)
- Insomnia
- Optional (Scratch Pad works without account)
Data location
- Requestr
- Stored in your browser only
- Postman
- Local in lightweight client; cloud sync optional
- Insomnia
- Local by default; cloud or Git optional
Time to first request
- Requestr
- Seconds (open tab, send)
- Postman
- Minutes if downloading desktop app
- Insomnia
- Minutes if downloading desktop app
CORS (browser use)
- Requestr
- Built-in server-side proxy
- Postman
- Web app needs Desktop Agent; desktop app unaffected
- Insomnia
- Desktop app — not subject to browser CORS
Supported protocols
- Requestr
- HTTP, GraphQL, WebSocket, Socket.IO
- Postman
- HTTP, GraphQL, WebSocket, Socket.IO, gRPC, SOAP, MQTT
- Insomnia
- HTTP, GraphQL, gRPC, WebSocket, Socket.IO, SSE
Pricing model
- Requestr
- Free, open source
- Postman
- Free tier; Solo from $9/mo; Team from $19/user/mo
- Insomnia
- Essentials free; Pro $12/user/mo; Enterprise $45/user/mo
Real-time support
- Requestr
- WebSocket + Socket.IO (browser-native)
- Postman
- WebSocket + Socket.IO
- Insomnia
- WebSocket + Socket.IO + SSE
| Feature | Requestr | Postman | Insomnia |
|---|---|---|---|
| Install required | None — open a browser tab | Desktop app or web app | Desktop app download |
| Account required | No | Optional (sign-in for sync & collections) | Optional (Scratch Pad works without account) |
| Data location | Stored in your browser only | Local in lightweight client; cloud sync optional | Local by default; cloud or Git optional |
| Time to first request | Seconds (open tab, send) | Minutes if downloading desktop app | Minutes if downloading desktop app |
| CORS (browser use) | Built-in server-side proxy | Web app needs Desktop Agent; desktop app unaffected | Desktop app — not subject to browser CORS |
| Supported protocols | HTTP, GraphQL, WebSocket, Socket.IO | HTTP, GraphQL, WebSocket, Socket.IO, gRPC, SOAP, MQTT | HTTP, GraphQL, gRPC, WebSocket, Socket.IO, SSE |
| Pricing model | Free, open source | Free tier; Solo from $9/mo; Team from $19/user/mo | Essentials free; Pro $12/user/mo; Enterprise $45/user/mo |
| Real-time support | WebSocket + Socket.IO (browser-native) | WebSocket + Socket.IO | WebSocket + Socket.IO + SSE |
Your API. Your browser. No strings attached.
Open a tab and start building. Everything runs locally, so there's nothing to configure and nothing to sync.
Free, open source, and yours — no sign-up required.