# Castline

Castline is a web app for turning saved audio into private podcast feeds. It is built for people who want to listen later in their podcast app without publishing a public podcast.

## Primary URL

https://castline.opoojkk.com/

## Category

Private podcast feed manager, listen-later audio inbox, RSS audio delivery app.

## What Castline Does

- Saves uploaded audio files to managed storage.
- Imports direct audio file URLs.
- Creates private, token-protected RSS feeds.
- Opens saved audio in podcast apps through standard podcast feed URLs.
- Tracks account usage for feed count, episode count, storage, URL imports, and media transfer.

## Current Scope

Castline supports direct audio workflows. It is not a YouTube downloader, video converter, public podcast host, or automatic channel sync tool.

## Audience

Castline is for founders, researchers, operators, creators, and professionals who collect audio they want to review later in a private podcast app workflow.

## Common Questions

### What is Castline?

Castline is a private podcast inbox for saved audio. Users add an audio file or direct audio URL, and Castline makes it available through a private RSS feed.

### Is Castline for public podcast publishing?

No. Castline focuses on private, token-protected feeds for personal or workspace listening.

### What audio sources are supported?

Castline supports uploaded audio files and direct audio file URLs, including MP3, M4A, AAC, WAV, OGG, and WebM.

### How is access protected?

Private RSS and media URLs use feed tokens. Rotating a token invalidates old RSS and media URLs.

## Key Pages

- Home and app: https://castline.opoojkk.com/
- Sitemap: https://castline.opoojkk.com/sitemap.xml
- Robots: https://castline.opoojkk.com/robots.txt