OPML Viewer | View OPML Files in Tree Format

OPML Viewer | View OPML Files in Tree Format

View and analyze OPML files (Outline Processor Markup Language)

OPML Statistics

Outline Items 0
Feed Links 0
Nested Levels 0
File Size 0 KB

OPML Viewer – View, Parse, and Analyze OPML Files

A robust web application called OPML Viewer was created to assist users in opening, viewing, and analyzing OPML (Outline Processor Markup Language) files straight from their web browser. This tool makes working with OPML files easier without requiring the installation of any software, whether you are handling complicated nested outlines, managing RSS feed collections or exporting content from a podcast manager.

For developers, bloggers, podcasters and data analysts who want to manage and comprehend OPML structures quickly and effectively, our OPML Viewer is perfect because of its clear interface, support for file uploads, URLs and JSON conversion, as well as its user friendly features like zoom, full-screen mode, and live preview.

An OPML file: what is it?

Outline Processor Markup Language is referred to as OPML. Originally developed by UserLand as an XML based format for managing outlines, it is now widely used for cross platform sharing of structured data such as tasks, notes, and outlines, as well as RSS feed lists and podcast subscriptions.

A hierarchy or tree structure can be represented by nesting the <outline> elements that make up a typical OPML file. Because of this, it can be used to manage anything that needs a parent child data relationship.

OPML files are frequently used for:

  • Importing and exporting RSS subscriptions from feed readers such as Inoreader or Feedly.
  • Distributing collections of podcast feeds.
  • Putting together book or blog content outlines.
  • Backing up content lists or bookmarks.

OPML Viewers salient features

With its extensive feature set our OPML Viewer can handle even the most complicated OPML structures. What to anticipate is as follows:

  1. Use a URL to load OPML
    The viewer will automatically retrieve and display the contents of an OPML file when you paste any valid URL that points to it such as https://example.com/feeds.opml. When working with remote OPML feeds that have been shared by others this is fantastic.
  2. Use File Upload to load OPML
    Uploading.opml files from your local device is simple. For the majority of use cases, there are no size restrictions, and parsing takes place directly in your browser.
  3. Auto-Updated Live OPML Preview
    As you load or modify files, observe how your OPML file structure automatically updates. Perfect for quickly iterating or understanding newly generated OPML outputs.
  4. Comprehensive OPML Data
    View useful metadata quickly, such as:
    • The quantity of outline items
    • number of feed links
    • Bytes of the file size
    • Nesting depth (levels of hierarchy)
    This summary provides an idea of the OPML file's level of detail or complexity.
  5. Tree View Expand/Collapse
    Use the unfold_more and unfold_less controls to switch between the OPML structure's expanded and collapsed views. This is useful when comparing several structures side by side or when working with deeply nested outlines.
  6. OPML to JSON conversion
    OPML content can be exported and viewed in JSON format, which is ideal for developers who wish to incorporate OPML content into their own applications or work with outline data in JavaScript.
  7. Retrieve Feed URLs
    Extract all of the RSS feed links that are included in your OPML with a single click. Excellent for conducting feed audits or switching between readers.
  8. In/Out Zoom
    Change the viewer's zoom level to make large OPML documents easier to read.
  9. Mode of Full Screen
    When reviewing large or complicated OPML structures, switch to a full-screen, distraction-free mode.
  10. Download and Copy
    Copy the JSON view or parsed OPML content to your clipboard.
    Get the OPML file to share or use as a backup.

⚙️ Using the OPML Viewer

Here's how to use our online OPML Viewer step-by-step:

Step 1: Load your OPML file.

You have two options:

  • In the Enter URL input field, paste a URL.
  • To choose a.opml file from your device, click the Upload File icon.

Step 2: Examine the Outline

The outline structure loads in a formatted tree view. To move through the hierarchy, use the fold/unfold buttons.

Step 3: Examine the Data

See the file's basic details, including its size, nested levels, feed links, and number of outline items.

Step 4: Make Use of Extra Equipment

  • With a single click, extract feeds.
  • For external use, convert to JSON.
  • For additional processing, download the file or make a copy of its contents.

Use Cases for Tech Users and Developers

  1. Management of RSS Feeds
    Viewing or moving your subscription list between feed readers is simple with tools like:
    • Feedly
    • The Elderly Reader
    • NetNewsWire
    • The Inoreader
  2. Organization of Podcasts
    OPML is the preferred format for podcast subscription management for podcasters who use apps like Overcast or Pocket Casts.
  3. Automation & Scripting
    Developers can parse OPML data that has been exported from note-taking applications or project management tools such as:
    • Workflow
    • Dynalist
    • Logseq
    • Obsidian (using specific plugins)
    Our tool facilitates the analysis of OPML structures prior to the creation of automation scripts.

OPML for Developers: A Brief Synopsis

A typical OPML structure looks like this:

<opml version="2.0">
  <head>
    <title>My Subscriptions</title>
  </head>
  <body>
    <outline text="Technology">
      <outline text="CoinDesk" type="rss" xmlUrl="https://www.coindesk.com/feed"/>
      <outline text="TechCrunch" type="rss" xmlUrl="https://techcrunch.com/feed"/>
    </outline>
  </body>
</opml>

RSS feeds can be described and linked to using attributes like text, type, and xmlUrl that can be included in any <outline> element.

Is the OPML Viewer safe?

Indeed. Your browser handles all client-side processing. This implies:

  • There is no server upload for your files.
  • Your information is kept safe and confidential.

Excellent for proprietary or delicate outline structures.

Relevant Resources

The following additional resources for developers and content managers go well with the OPML Viewer:

  • XML Formatter: This tool formats and enhances XML data.
  • XML to JSON Converter: Convert entire OPML XML files to clean JSON format with the XML to JSON Converter.
  • RSS Viewer: View RSS feeds taken from OPML subscriptions with the RSS Viewer.
  • HTML Formatter: For formatting embedded HTML in OPML notes, HTML Formatter is ideal.

Tips for Better OPML Organization

  • Make use of titles that are clear: Put meaningful labels on your outlines to make them easier to find.
  • Steer clear of needless nesting: It can be more difficult to maintain deeply nested structures.
  • Organize logically: Sort outlines according to source, category, or type of content.
  • Verify the structure: To visually verify that tags and attributes are positioned correctly, use our viewer.

OPML Viewer: Who Uses It?

Many different types of users can benefit from our tool:

  • Developers who work with content aggregators or feeds.
  • Bloggers moving backup feeds or RSS readers.
  • Podcast listeners can import or export their collection.
  • Technical writers who deal with organized material.
  • Teachers and students are investigating structured markup formats.