Free Online OPML Beautifier & Formatter
Format, beautify, and validate OPML (Outline Processor Markup Language) files online. OPML is an XML format commonly used to export and import RSS feed subscriptions, podcasts, and outline structures across readers.
Our OPML Beautifier cleans messy or minified OPML markup by applying structural tree indentation and validating node tags directly inside your browser.
Key Features of Our Online OPML Beautifier
Structural Indentation
Formats OPML outline elements into clean, easy-to-read tag hierarchies.
XML & OPML Validation
Checks for broken tags and missing markup before rendering formatted outputs.
Minification Support
Compresses OPML documents into single-line strings when needed.
Client-Side Privacy
Executes parsing locally in browser memory without sending feed data to remote servers.
How to Use the OPML Beautifier
- Paste raw OPML or RSS outline markup into the left input box.
- Click "Beautify OPML" to auto-format nested tags and indentation.
- Review the structured output in the right column.
- Click "Copy Result" or "Download" to export your formatted .opml file.
Frequently Asked Questions (FAQs)
What is an OPML file?
OPML stands for Outline Processor Markup Language. It is an XML dialect used to exchange structured outline data such as RSS subscriptions and podcast feeds.
Will formatting change my feed URLs?
No. The beautification process only adjusts structural spacing and line breaks without modifying tag attributes or URLs.