Your mom can debug faster now
See every trace.
Debug any flow.
An Electron desktop tool that captures every UI event, network call, console log, and error — zero code changes required. Correlates frontend and backend in a unified trace timeline.
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Caution. Use FlowLens at your own risk. You might actually start shipping faster.
You enjoy debugging at 3 AM
Who needs sleep when you can grep through 47 log files?
console.log is your best friend
20 hours of adding logs, 5 minutes of actual fixing. Peak productivity.
You think bugs add character
That random crash in production? It's a feature. Users love surprises.
You love context-switching
Browser, terminal, editor, repeat. Great cardio for your fingers.
Guesswork is your methodology
"It works on my machine" is a valid deployment strategy, right?
Stack traces are bedtime stories
Nothing puts you to sleep faster than 200 lines of minified errors.
You enjoy debugging at 3 AM
Who needs sleep when you can grep through 47 log files?
console.log is your best friend
20 hours of adding logs, 5 minutes of actual fixing. Peak productivity.
You think bugs add character
That random crash in production? It's a feature. Users love surprises.
You love context-switching
Browser, terminal, editor, repeat. Great cardio for your fingers.
Guesswork is your methodology
"It works on my machine" is a valid deployment strategy, right?
Stack traces are bedtime stories
Nothing puts you to sleep faster than 200 lines of minified errors.
capabilities
Everything you need to trace full-stack behavior
get started
Up and running in minutes
Follow these steps to start tracing your full-stack app.
Paste your URL
Paste your app's URL into FlowLens. It loads in an embedded browser with auto-injected instrumentation.
Add backend tracing
Install @nihal/flowlens-node to correlate server-side spans with frontend traces.
Wire up middleware
Add the middleware to your Express, Fastify, or raw HTTP server. CORS must allow the trace header.
import cors from "cors";
import { flowlens } from "@nihal/flowlens-node";
app.use(flowlens({ serviceName: "my-api" });Ready to debug?
Get started in under a minute.