Falkenr
Falkenr
Debug locally. Share instantly.
Local-first runtime debuggingshare when it matters

Debug Spring Boot issues with the exact runtime state in front of you.

Falkenr gives you a zero-config runtime dashboard at/_devthen lets you share the same debugging context with teammates when a bug needs more than screenshots and logs.

Quick install
dependencies {
  implementation("io.github.ogheck:spring-devtools-ui:0.1.5")
}
Restart your app and open /_dev
Java 17+ and Spring Boot 3.2.x / 3.3.x
Product preview

The actual runtime dashboard, not a mockup.

Falkenr runs inside your Spring Boot app and exposes live runtime state through a local dashboard first. Hosted sharing builds on the same session when another developer needs to inspect it with you.

Falkenr runtime dashboard showing Spring Boot endpoints, requests, logs, and config
Runtime dashboard preview
How it works

Local runtime first, collaboration when you need it.

1. Start local

Add one dependency. Restart your app. Open /_dev. See endpoints, requests, logs, config, jobs, and more instantly.

2. Stay free locally

Keep using the local dashboard without registration, payment, cloud setup, or hosted data transfer.

3. Upgrade for Team

Sign in only when you want the hosted relay, teammate invitations, viewer sessions, and shared replay context.

4. Collaborate

Teammates inspect the same requests, logs, config, and replay artifacts from a hosted session.

Local vs hosted boundary

No account until the debugging session leaves your machine.

The public starter is for local development. Team beta starts when Falkenr hosts collaboration state, viewer sessions, invitations, or replay context for other people.

Install and open /_dev locally
Free
Included
Team beta
Not required
Access
No account
Inspect endpoints, requests, logs, config, jobs, DB queries, flags, fakes, and time controls
Free
Included
Team beta
Not required
Access
No account
Use the public GitHub repo, examples, and Apache-2.0 starter
Free
Included
Team beta
Not required
Access
No account
Attach a local session to the Falkenr hosted relay
Free
Not included
Team beta
Included
Access
Team account
Core value

Stop debugging alone.

Most debugging breaks down when it leaves your machine:

Can you reproduce this?
Send me the logs
Works on my machine
Try hitting this endpoint

Falkenr replaces all of that with a single link.

Why Falkenr is different
Zero setup
No database or local service required for the free dashboard. Just add the dependency.
Local-first
Everything works entirely on your machine.
Share when needed
Turn on remote access only when you want to collaborate.
Not another observability tool
This is your actual runtime, not logs after the fact.
Features

Everything you need, built into your app.

Real runtime surfaces, plus the power tools you reach for when a session turns messy.

Runtime visibility
  • • Endpoints explorer
  • • Request capture (headers, body, status)
  • • Logs with filtering and stack traces
  • • Full config inspection
Developer power tools
  • • Background jobs viewer
  • • DB query tracking
  • • Dependency graph
  • • Feature flag overrides
  • • Webhook simulator
  • • Fake external services
  • • Time control
Hosted collaboration
  • • Shareable session links
  • • Hosted viewer
  • • Request replay artifacts
  • • Multi-user session view
Current product status

Built and running.

Local runtime visibility, hosted Team checkout, share links, invitations, and the hosted viewer are live. Persistent history and enterprise controls remain planned.

Status
Local debugging
complete
Runtime visibility
complete
Developer power tools
complete
Hosted collaboration
paid beta
Persistent history
planned
Enterprise controls
planned
Production use
not supported
Where it fits

From solo debugging to shared sessions.

During development
Understand your app instantly without adding tooling.
During debugging
Capture the exact request and state that caused the issue.
Across teammates
Share a live debugging session instead of writing repro steps.
Across time zones
Prepare session context someone else can inspect later.
Simple pricing

Start free. Pay only for hosted Team collaboration.

Free local use needs no account. Team beta needs a Falkenr account because it uses hosted relay, invitations, viewer sessions, and shared debugging state. There is no free hosted workspace.