Sinkhole

Mon, 01 Jan 0001 00:00:00 +0000

Sinkhole is a zero-infrastructure email trap for staging environments. It runs as a Cloudflare Worker with D1 storage and a built-in web UI. Emails are POSTed over HTTP with no SMTP server needed.

Overview

When you’re building and testing applications, you don’t want real emails going out to real people. Sinkhole captures all outgoing mail from your app and stores it in a simple web UI where you can inspect and verify everything without it leaving your environment.

It’s designed to run entirely on Cloudflare’s free tier. There are no servers, no SMTP, no Docker containers. Fork the repo, create your GitHub OAuth app to authenticate your team, deploy the Worker, and you’re all set.

Features

No SMTP required - Emails are sent via a simple HTTP POST, so there’s no mail server to configure or maintain
Built-in web UI - Browse, search, and inspect captured emails directly in your browser
Cloudflare Worker - Runs on the edge with D1 for storage and R2 for attachments, all within the free tier
GitHub OAuth - Restrict access to your GitHub org or a specific team
Channels - Separate captured emails by environment, project, or team
Attachment support - Attachments are stored in R2 and viewable from the UI
Laravel integration - A companion sinkhole-laravel package makes it a tiny config change to capture all outgoing mail from any Laravel app

Screenshooter

Mon, 01 Jan 0001 00:00:00 +0000

Screenshooter is a client-side tool for creating consistent, beautiful social media images. Upload a screenshot, pick a canvas size, tweak the effects, add text, and download a PNG, without leaving the browser.

Overview

Creating good-looking OpenGraph images, Twitter banners, and other social graphics usually means opening a design tool, fiddling with templates, and exporting manually. Screenshooter strips that down to a single HTML page with no build step, no server, and no dependencies. Everything runs in the browser using HTML5 Canvas.

Built entirely by Claude - initially with Sonnet 4, later improved with Opus 4.6.

Features

Preset canvas sizes - Twitter Banner, Twitter Timeline, OpenGraph, 16:9, Email, or define your own custom dimensions
Image effects - Skew, grayscale, zoom, opacity, grain, and depth of field
Text overlays - Title and body text with customizable color, size, and alignment
PNG export - One-click download of the final image

Open Source on Frontier.sh

Sinkhole

Overview

Features

Screenshooter

Overview

Features