< Free & Open Source · MIT >

See What
Your App
Is Doing.

Instantly.

A debug receiver for any language or runtime. Send objects, errors, SQL, and timers — watch them stream into the desktop app in real time.

Download ↓ Read the docs →

macOS · Windows · Linux

· ★ GitHub

LIVE

< The problem >

The Old Way vs.
The Fanar Way.

WITHOUT FANAR

WITH FANAR

✕ console.log everywhere

✓ Structured, typed payloads

✕ Remove before committing

✓ Always-on, stays in dev only

✕ No SQL visibility

✓ SQL with syntax highlight + timing

✕ No timing data

✓ Named timers built-in

✕ Stack traces buried in logs

✓ Clickable frames — opens VS Code

< How it works >

Three Steps.
Full Visibility.

Install the client

npm install @fanar-app/fanar

Send any value

fanar({ user, orders })

Watch it appear

← real-time, no refresh

< Features >

Built For The Way
Developers Work.

Any Language

Plain HTTP POST API. Works from Node, PHP, Python, Ruby, Go, or curl.

Real-Time

No polling. Payloads stream to the app the moment they arrive.

SQL Inspector

Queries arrive with syntax highlighting, bound values, and execution time.

Stack Traces

Click any frame to open the exact file and line in VS Code.

Named Timers

fanar.time('render').stop() — measure anything with one line.

Zero Config

One import auto-instruments NestJS and Laravel — fully automatic.

< Client libraries >

Send From Anywhere.

One package for Node. One import for NestJS or Laravel.
Or skip the library — plain HTTP works from anything.

▌

import fanar from '@fanar-app/fanar'

fanar('hello world')
fanar({ user, orders })
fanar(new Error('oops'))
fanar.query(sql, { bindings, duration })
fanar.time('render').stop()

docs →

import { FanarModule } from '@fanar-app/fanar/nestjs'

@Module({
  imports: [FanarModule.register()],
})
export class AppModule {}

// Auto-logs every request, query, and exception

docs →

<?php
use Fanar\Fanar;

Fanar::dump('hello');
Fanar::dump(['user' => $user, 'orders' => $orders]);
Fanar::dump(new Exception('oops'));
Fanar::query($sql, $bindings, $duration);
Fanar::time('render')->stop();

docs →

// config/app.php
'providers' => [
    Fanar\Laravel\FanarServiceProvider::class,
],

// .env
FANAR_HOST=127.0.0.1
FANAR_PORT=9913

// Auto-logs every request, query, and exception

docs →

<script src="https://cdn.jsdelivr.net/npm/@fanar-app/fanar-browser/dist/fanar.min.js"></script>
<script>
  fanar('hello from the browser')
  fanar({ user, cart }).label('checkout')
  fanar(new Error('something went wrong'))
  fanar.time('render').stop()
</script>

docs →

curl -X POST http://localhost:9913/api/payloads \
  -H "Content-Type: application/json" \
  -d '{"type":"log","label":"Hello","content":"World"}'

# Works from any language, script, or CI pipeline

docs →

< Downloads >