# Self-hosted developer tools apps for Cloudflare

> Database GUIs, crawlers, webhooks, API testing and other tools for developers. 15 open-source apps you can deploy to your own Cloudflare account, ranked by stars and recent commits.

Page: https://openflarestack.com/category/developer-tools/. Updated 2026-10-13.

## 1. Outerbase Studio

A lightweight browser-based database GUI supporting Postgres, MySQL, and SQLite.

- Repository: https://github.com/outerbase/studio (AGPL-3.0, 5992 stars, last commit 2026-03-25)
- Creates: KV namespace
- Deploy: https://deploy.workers.cloudflare.com/?url=https://github.com/outerbase/studio
- Details: https://openflarestack.com/apps/studio.md

## 2. chmonitor

Dashboard for ClickHouse clusters that shows queries and health and suggests tuning fixes.

- Repository: https://github.com/chmonitor/chmonitor (GPL-3.0, 301 stars, last commit 2026-10-13)
- Creates: D1 database, KV namespace, Browser Rendering, Cron trigger
- Install: see https://github.com/chmonitor/chmonitor#readme
- Details: https://openflarestack.com/apps/chmonitor.md

## 3. Deepcrawl

Turns web pages into clean markdown and link trees for AI agents, with a dashboard. Self-hosted alternative to Firecrawl.

- Repository: https://github.com/lumpinif/deepcrawl (MIT, 688 stars, last commit 2026-08-24)
- Creates: KV namespace, D1 database
- Install: see https://github.com/lumpinif/deepcrawl#readme
- Details: https://openflarestack.com/apps/deepcrawl.md

## 4. Sub Box

Manage and merge proxy subscription links into custom Clash configs with multi‑user support.

- Repository: https://github.com/kleinrui/sub-box (Apache-2.0, 156 stars, last commit 2026-10-10)
- Creates: D1 database
- Deploy: https://deploy.workers.cloudflare.com/?url=https://github.com/kleinrui/sub-box
- Details: https://openflarestack.com/apps/sub-box.md

## 5. Codra

AI reviewer that posts inline findings on GitHub pull requests, with a dashboard to tune it. Self-hosted alternative to CodeRabbit.

- Repository: https://github.com/devarshishimpi/codra (AGPL-3.0, 120 stars, last commit 2026-10-06)
- Creates: KV namespace, Hyperdrive, Queues, Workflows, Workers AI, Cron trigger
- Install: see https://github.com/devarshishimpi/codra#readme
- Details: https://openflarestack.com/apps/codra.md

## 6. placeholders.dev

Generates custom placeholder images on the fly from simple URL parameters. Self-hosted alternative to Placeholder.com.

- Repository: https://github.com/Cherry/placeholders.dev (MIT, 163 stars, last commit 2026-09-17)
- Creates: Analytics Engine
- Deploy: https://deploy.workers.cloudflare.com/?url=https://github.com/Cherry/placeholders.dev
- Details: https://openflarestack.com/apps/placeholders-dev.md

## 7. Webhooks Proxy Tunnel

Exposes your local HTTP server to the public internet via a Cloudflare Worker tunnel for webhook testing. Self-hosted alternative to ngrok.

- Repository: https://github.com/peter-leonov/webhooks-proxy-tunnel (MIT, 65 stars, last commit 2026-10-03)
- Creates: Durable Objects
- Deploy: https://deploy.workers.cloudflare.com/?url=https://github.com/peter-leonov/webhooks-proxy-tunnel/tree/main/worker
- Details: https://openflarestack.com/apps/webhooks-proxy-tunnel.md

## 8. TypedWebhook.tools

Catches test webhooks and turns their JSON into TypeScript, Cue and JSON Schema types. Self-hosted alternative to webhook.site.

- Repository: https://github.com/inngest/typedwebhook.tools (GPL-3.0, 307 stars, last commit 2026-03-31)
- Creates: KV namespace, Durable Objects
- Deploy: https://deploy.workers.cloudflare.com/?url=https%3A%2F%2Fgithub.com%2Finngest%2Ftypedwebhook.tools
- Details: https://openflarestack.com/apps/typedwebhook-tools.md

## 9. Droidline

Control real Android phones from code for testing, automation, and AI agents - no ADB, cable, or root needed. Self-hosted alternative to Appium.

- Repository: https://github.com/KnifeLemon/Droidline (MIT, 18 stars, last commit 2026-10-11)
- Creates: Durable Objects
- Install: see https://github.com/KnifeLemon/Droidline#readme
- Details: https://openflarestack.com/apps/droidline.md

## 10. CertHub

Requests, renews and distributes SSL certificates from several CAs with a web console and API.

- Repository: https://github.com/PIKACHUIM/CFWorkerACME (GPL-3.0, 99 stars, last commit 2026-05-27)
- Creates: D1 database, Cron trigger
- Deploy: https://deploy.workers.cloudflare.com/?url=https%3A%2F%2Fgithub.com%2FPIKACHUIM%2FCFWorkerACME
- Details: https://openflarestack.com/apps/cfworkeracme.md

## 11. workers-firecrawl

Firecrawl-compatible search, map and scrape API that runs on a headless browser you host. Self-hosted alternative to Firecrawl.

- Repository: https://github.com/G4brym/workers-firecrawl (MIT, 62 stars, last commit 2026-03-13)
- Creates: Browser Rendering
- Deploy: https://deploy.workers.cloudflare.com/?url=https://github.com/G4brym/workers-firecrawl
- Details: https://openflarestack.com/apps/workers-firecrawl.md

## 12. Your IP

Displays your IP address, geolocation, and connection details via a web UI and API. Self-hosted alternative to ipify.

- Repository: https://github.com/jim60105/worker-your-ip (GPL-3.0, 11 stars, last commit 2026-08-23)
- Creates: no bindings found
- Deploy: https://deploy.workers.cloudflare.com/?url=https://github.com/jim60105/worker-your-ip
- Details: https://openflarestack.com/apps/worker-your-ip.md

## 13. usage-guard-collector

Alerts you on Discord or Slack when Cloudflare usage suddenly spikes, before the bill shows it.

- Repository: https://github.com/HowardZlh/usage-guard-collector (MIT, 3 stars, last commit 2026-10-12)
- Creates: D1 database, Cron trigger
- Deploy: https://deploy.workers.cloudflare.com/?url=https://github.com/HowardZlh/usage-guard-collector
- Details: https://openflarestack.com/apps/usage-guard-collector.md

## 14. httpbin-hono

Your own private httpbin for testing HTTP clients, with Swagger docs built in.

- Repository: https://github.com/nakanoasaservice/httpbin-hono (ISC, 6 stars, last commit 2026-08-23)
- Creates: no bindings found
- Deploy: https://deploy.workers.cloudflare.com/?url=https://github.com/nakanoasaservice/httpbin-hono
- Details: https://openflarestack.com/apps/httpbin-hono.md

## 15. Webhook Relay

Receive, store and forward webhooks with signed URLs and a live dashboard. Self-hosted alternative to Hookdeck.

- Repository: https://github.com/Soul-Brews-Studio/soul-brews-cat-lab-webhook-relay (MIT, 5 stars, last commit 2026-02-27)
- Creates: D1 database
- Deploy: https://deploy.workers.cloudflare.com/?url=https%3A%2F%2Fgithub.com%2FSoul-Brews-Studio%2Fsoul-brews-cat-lab-webhook-relay
- Details: https://openflarestack.com/apps/soul-brews-cat-lab-webhook-relay.md